add idl4k kernel firmware version 1.13.0.105

kernel/drivers/power/Kconfig

@@ -0,0 +1,113 @@
+menuconfig POWER_SUPPLY
+	tristate "Power supply class support"
+	help
+	  Say Y here to enable power supply class support. This allows
+	  power supply (batteries, AC, USB) monitoring by userspace
+	  via sysfs and uevent (if available) and/or APM kernel interface
+	  (if selected below).
+
+if POWER_SUPPLY
+
+config POWER_SUPPLY_DEBUG
+	bool "Power supply debug"
+	help
+	  Say Y here to enable debugging messages for power supply class
+	  and drivers.
+
+config PDA_POWER
+	tristate "Generic PDA/phone power driver"
+	depends on !S390
+	help
+	  Say Y here to enable generic power driver for PDAs and phones with
+	  one or two external power supplies (AC/USB) connected to main and
+	  backup batteries, and optional builtin charger.
+
+config APM_POWER
+	tristate "APM emulation for class batteries"
+	depends on APM_EMULATION
+	help
+	  Say Y here to enable support APM status emulation using
+	  battery class devices.
+
+config WM831X_POWER
+	tristate "WM831X PMU support"
+	depends on MFD_WM831X
+	help
+	  Say Y here to enable support for the power management unit
+	  provided by Wolfson Microelectronics WM831x PMICs.
+
+config WM8350_POWER
+        tristate "WM8350 PMU support"
+        depends on MFD_WM8350
+        help
+          Say Y here to enable support for the power management unit
+	  provided by the Wolfson Microelectronics WM8350 PMIC.
+
+config BATTERY_DS2760
+	tristate "DS2760 battery driver (HP iPAQ & others)"
+	select W1
+	select W1_SLAVE_DS2760
+	help
+	  Say Y here to enable support for batteries with ds2760 chip.
+
+config BATTERY_DS2782
+	tristate "DS2782 standalone gas-gauge"
+	depends on I2C
+	help
+	  Say Y here to enable support for the DS2782 standalone battery
+	  gas-gauge.
+
+config BATTERY_PMU
+	tristate "Apple PMU battery"
+	depends on PPC32 && ADB_PMU
+	help
+	  Say Y here to expose battery information on Apple machines
+	  through the generic battery class.
+
+config BATTERY_OLPC
+	tristate "One Laptop Per Child battery"
+	depends on X86_32 && OLPC
+	help
+	  Say Y to enable support for the battery on the OLPC laptop.
+
+config BATTERY_TOSA
+	tristate "Sharp SL-6000 (tosa) battery"
+	depends on MACH_TOSA && MFD_TC6393XB && TOUCHSCREEN_WM97XX
+	help
+	  Say Y to enable support for the battery on the Sharp Zaurus
+	  SL-6000 (tosa) models.
+
+config BATTERY_WM97XX
+	bool "WM97xx generic battery driver"
+	depends on TOUCHSCREEN_WM97XX=y
+	help
+	  Say Y to enable support for battery measured by WM97xx aux port.
+
+config BATTERY_BQ27x00
+	tristate "BQ27200 battery driver"
+	depends on I2C
+	help
+	  Say Y here to enable support for batteries with BQ27200(I2C) chip.
+
+config BATTERY_DA9030
+	tristate "DA9030 battery driver"
+	depends on PMIC_DA903X
+	help
+	  Say Y here to enable support for batteries charger integrated into
+	  DA9030 PMIC.
+
+config BATTERY_MAX17040
+	tristate "Maxim MAX17040 Fuel Gauge"
+	depends on I2C
+	help
+	  MAX17040 is fuel-gauge systems for lithium-ion (Li+) batteries
+	  in handheld and portable equipment. The MAX17040 is configured
+	  to operate with a single lithium cell
+
+config CHARGER_PCF50633
+	tristate "NXP PCF50633 MBC"
+	depends on MFD_PCF50633
+	help
+	 Say Y to include support for NXP PCF50633 Main Battery Charger.
+
+endif # POWER_SUPPLY

kernel/drivers/power/Makefile

@@ -0,0 +1,31 @@
+power_supply-objs := power_supply_core.o
+
+ifeq ($(CONFIG_SYSFS),y)
+power_supply-objs += power_supply_sysfs.o
+endif
+
+ifeq ($(CONFIG_LEDS_TRIGGERS),y)
+power_supply-objs += power_supply_leds.o
+endif
+
+ifeq ($(CONFIG_POWER_SUPPLY_DEBUG),y)
+EXTRA_CFLAGS += -DDEBUG
+endif
+
+obj-$(CONFIG_POWER_SUPPLY)	+= power_supply.o
+
+obj-$(CONFIG_PDA_POWER)		+= pda_power.o
+obj-$(CONFIG_APM_POWER)		+= apm_power.o
+obj-$(CONFIG_WM831X_POWER)	+= wm831x_power.o
+obj-$(CONFIG_WM8350_POWER)	+= wm8350_power.o
+
+obj-$(CONFIG_BATTERY_DS2760)	+= ds2760_battery.o
+obj-$(CONFIG_BATTERY_DS2782)	+= ds2782_battery.o
+obj-$(CONFIG_BATTERY_PMU)	+= pmu_battery.o
+obj-$(CONFIG_BATTERY_OLPC)	+= olpc_battery.o
+obj-$(CONFIG_BATTERY_TOSA)	+= tosa_battery.o
+obj-$(CONFIG_BATTERY_WM97XX)	+= wm97xx_battery.o
+obj-$(CONFIG_BATTERY_BQ27x00)	+= bq27x00_battery.o
+obj-$(CONFIG_BATTERY_DA9030)	+= da9030_battery.o
+obj-$(CONFIG_BATTERY_MAX17040)	+= max17040_battery.o
+obj-$(CONFIG_CHARGER_PCF50633)	+= pcf50633-charger.o

kernel/drivers/power/apm_power.c

@@ -0,0 +1,375 @@
+/*
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ * Copyright © 2007 Eugeny Boger <eugenyboger@dgap.mipt.ru>
+ *
+ * Author: Eugeny Boger <eugenyboger@dgap.mipt.ru>
+ *
+ * Use consistent with the GNU GPL is permitted,
+ * provided that this copyright notice is
+ * preserved in its entirety in all copies and derived works.
+ */
+
+#include <linux/module.h>
+#include <linux/power_supply.h>
+#include <linux/apm-emulation.h>
+
+
+#define PSY_PROP(psy, prop, val) psy->get_property(psy, \
+			 POWER_SUPPLY_PROP_##prop, val)
+
+#define _MPSY_PROP(prop, val) main_battery->get_property(main_battery, \
+							 prop, val)
+
+#define MPSY_PROP(prop, val) _MPSY_PROP(POWER_SUPPLY_PROP_##prop, val)
+
+static DEFINE_MUTEX(apm_mutex);
+static struct power_supply *main_battery;
+
+enum apm_source {
+	SOURCE_ENERGY,
+	SOURCE_CHARGE,
+	SOURCE_VOLTAGE,
+};
+
+struct find_bat_param {
+	struct power_supply *main;
+	struct power_supply *bat;
+	struct power_supply *max_charge_bat;
+	struct power_supply *max_energy_bat;
+	union power_supply_propval full;
+	int max_charge;
+	int max_energy;
+};
+
+static int __find_main_battery(struct device *dev, void *data)
+{
+	struct find_bat_param *bp = (struct find_bat_param *)data;
+
+	bp->bat = dev_get_drvdata(dev);
+
+	if (bp->bat->use_for_apm) {
+		/* nice, we explicitly asked to report this battery. */
+		bp->main = bp->bat;
+		return 1;
+	}
+
+	if (!PSY_PROP(bp->bat, CHARGE_FULL_DESIGN, &bp->full) ||
+			!PSY_PROP(bp->bat, CHARGE_FULL, &bp->full)) {
+		if (bp->full.intval > bp->max_charge) {
+			bp->max_charge_bat = bp->bat;
+			bp->max_charge = bp->full.intval;
+		}
+	} else if (!PSY_PROP(bp->bat, ENERGY_FULL_DESIGN, &bp->full) ||
+			!PSY_PROP(bp->bat, ENERGY_FULL, &bp->full)) {
+		if (bp->full.intval > bp->max_energy) {
+			bp->max_energy_bat = bp->bat;
+			bp->max_energy = bp->full.intval;
+		}
+	}
+	return 0;
+}
+
+static void find_main_battery(void)
+{
+	struct find_bat_param bp;
+	int error;
+
+	memset(&bp, 0, sizeof(struct find_bat_param));
+	main_battery = NULL;
+	bp.main = main_battery;
+
+	error = class_for_each_device(power_supply_class, NULL, &bp,
+				      __find_main_battery);
+	if (error) {
+		main_battery = bp.main;
+		return;
+	}
+
+	if ((bp.max_energy_bat && bp.max_charge_bat) &&
+			(bp.max_energy_bat != bp.max_charge_bat)) {
+		/* try guess battery with more capacity */
+		if (!PSY_PROP(bp.max_charge_bat, VOLTAGE_MAX_DESIGN,
+			      &bp.full)) {
+			if (bp.max_energy > bp.max_charge * bp.full.intval)
+				main_battery = bp.max_energy_bat;
+			else
+				main_battery = bp.max_charge_bat;
+		} else if (!PSY_PROP(bp.max_energy_bat, VOLTAGE_MAX_DESIGN,
+								  &bp.full)) {
+			if (bp.max_charge > bp.max_energy / bp.full.intval)
+				main_battery = bp.max_charge_bat;
+			else
+				main_battery = bp.max_energy_bat;
+		} else {
+			/* give up, choice any */
+			main_battery = bp.max_energy_bat;
+		}
+	} else if (bp.max_charge_bat) {
+		main_battery = bp.max_charge_bat;
+	} else if (bp.max_energy_bat) {
+		main_battery = bp.max_energy_bat;
+	} else {
+		/* give up, try the last if any */
+		main_battery = bp.bat;
+	}
+}
+
+static int do_calculate_time(int status, enum apm_source source)
+{
+	union power_supply_propval full;
+	union power_supply_propval empty;
+	union power_supply_propval cur;
+	union power_supply_propval I;
+	enum power_supply_property full_prop;
+	enum power_supply_property full_design_prop;
+	enum power_supply_property empty_prop;
+	enum power_supply_property empty_design_prop;
+	enum power_supply_property cur_avg_prop;
+	enum power_supply_property cur_now_prop;
+
+	if (MPSY_PROP(CURRENT_AVG, &I)) {
+		/* if battery can't report average value, use momentary */
+		if (MPSY_PROP(CURRENT_NOW, &I))
+			return -1;
+	}
+
+	if (!I.intval)
+		return 0;
+
+	switch (source) {
+	case SOURCE_CHARGE:
+		full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
+		full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
+		empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
+		empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
+		cur_avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
+		cur_now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
+		break;
+	case SOURCE_ENERGY:
+		full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
+		full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
+		empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
+		empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
+		cur_avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
+		cur_now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
+		break;
+	case SOURCE_VOLTAGE:
+		full_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX;
+		full_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN;
+		empty_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN;
+		empty_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN;
+		cur_avg_prop = POWER_SUPPLY_PROP_VOLTAGE_AVG;
+		cur_now_prop = POWER_SUPPLY_PROP_VOLTAGE_NOW;
+		break;
+	default:
+		printk(KERN_ERR "Unsupported source: %d\n", source);
+		return -1;
+	}
+
+	if (_MPSY_PROP(full_prop, &full)) {
+		/* if battery can't report this property, use design value */
+		if (_MPSY_PROP(full_design_prop, &full))
+			return -1;
+	}
+
+	if (_MPSY_PROP(empty_prop, &empty)) {
+		/* if battery can't report this property, use design value */
+		if (_MPSY_PROP(empty_design_prop, &empty))
+			empty.intval = 0;
+	}
+
+	if (_MPSY_PROP(cur_avg_prop, &cur)) {
+		/* if battery can't report average value, use momentary */
+		if (_MPSY_PROP(cur_now_prop, &cur))
+			return -1;
+	}
+
+	if (status == POWER_SUPPLY_STATUS_CHARGING)
+		return ((cur.intval - full.intval) * 60L) / I.intval;
+	else
+		return -((cur.intval - empty.intval) * 60L) / I.intval;
+}
+
+static int calculate_time(int status)
+{
+	int time;
+
+	time = do_calculate_time(status, SOURCE_ENERGY);
+	if (time != -1)
+		return time;
+
+	time = do_calculate_time(status, SOURCE_CHARGE);
+	if (time != -1)
+		return time;
+
+	time = do_calculate_time(status, SOURCE_VOLTAGE);
+	if (time != -1)
+		return time;
+
+	return -1;
+}
+
+static int calculate_capacity(enum apm_source source)
+{
+	enum power_supply_property full_prop, empty_prop;
+	enum power_supply_property full_design_prop, empty_design_prop;
+	enum power_supply_property now_prop, avg_prop;
+	union power_supply_propval empty, full, cur;
+	int ret;
+
+	switch (source) {
+	case SOURCE_CHARGE:
+		full_prop = POWER_SUPPLY_PROP_CHARGE_FULL;
+		empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY;
+		full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN;
+		empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN;
+		now_prop = POWER_SUPPLY_PROP_CHARGE_NOW;
+		avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG;
+		break;
+	case SOURCE_ENERGY:
+		full_prop = POWER_SUPPLY_PROP_ENERGY_FULL;
+		empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY;
+		full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN;
+		empty_design_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY_DESIGN;
+		now_prop = POWER_SUPPLY_PROP_ENERGY_NOW;
+		avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG;
+		break;
+	case SOURCE_VOLTAGE:
+		full_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX;
+		empty_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN;
+		full_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN;
+		empty_design_prop = POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN;
+		now_prop = POWER_SUPPLY_PROP_VOLTAGE_NOW;
+		avg_prop = POWER_SUPPLY_PROP_VOLTAGE_AVG;
+		break;
+	default:
+		printk(KERN_ERR "Unsupported source: %d\n", source);
+		return -1;
+	}
+
+	if (_MPSY_PROP(full_prop, &full)) {
+		/* if battery can't report this property, use design value */
+		if (_MPSY_PROP(full_design_prop, &full))
+			return -1;
+	}
+
+	if (_MPSY_PROP(avg_prop, &cur)) {
+		/* if battery can't report average value, use momentary */
+		if (_MPSY_PROP(now_prop, &cur))
+			return -1;
+	}
+
+	if (_MPSY_PROP(empty_prop, &empty)) {
+		/* if battery can't report this property, use design value */
+		if (_MPSY_PROP(empty_design_prop, &empty))
+			empty.intval = 0;
+	}
+
+	if (full.intval - empty.intval)
+		ret =  ((cur.intval - empty.intval) * 100L) /
+		       (full.intval - empty.intval);
+	else
+		return -1;
+
+	if (ret > 100)
+		return 100;
+	else if (ret < 0)
+		return 0;
+
+	return ret;
+}
+
+static void apm_battery_apm_get_power_status(struct apm_power_info *info)
+{
+	union power_supply_propval status;
+	union power_supply_propval capacity, time_to_full, time_to_empty;
+
+	mutex_lock(&apm_mutex);
+	find_main_battery();
+	if (!main_battery) {
+		mutex_unlock(&apm_mutex);
+		return;
+	}
+
+	/* status */
+
+	if (MPSY_PROP(STATUS, &status))
+		status.intval = POWER_SUPPLY_STATUS_UNKNOWN;
+
+	/* ac line status */
+
+	if ((status.intval == POWER_SUPPLY_STATUS_CHARGING) ||
+	    (status.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) ||
+	    (status.intval == POWER_SUPPLY_STATUS_FULL))
+		info->ac_line_status = APM_AC_ONLINE;
+	else
+		info->ac_line_status = APM_AC_OFFLINE;
+
+	/* battery life (i.e. capacity, in percents) */
+
+	if (MPSY_PROP(CAPACITY, &capacity) == 0) {
+		info->battery_life = capacity.intval;
+	} else {
+		/* try calculate using energy */
+		info->battery_life = calculate_capacity(SOURCE_ENERGY);
+		/* if failed try calculate using charge instead */
+		if (info->battery_life == -1)
+			info->battery_life = calculate_capacity(SOURCE_CHARGE);
+		if (info->battery_life == -1)
+			info->battery_life = calculate_capacity(SOURCE_VOLTAGE);
+	}
+
+	/* charging status */
+
+	if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
+		info->battery_status = APM_BATTERY_STATUS_CHARGING;
+	} else {
+		if (info->battery_life > 50)
+			info->battery_status = APM_BATTERY_STATUS_HIGH;
+		else if (info->battery_life > 5)
+			info->battery_status = APM_BATTERY_STATUS_LOW;
+		else
+			info->battery_status = APM_BATTERY_STATUS_CRITICAL;
+	}
+	info->battery_flag = info->battery_status;
+
+	/* time */
+
+	info->units = APM_UNITS_MINS;
+
+	if (status.intval == POWER_SUPPLY_STATUS_CHARGING) {
+		if (!MPSY_PROP(TIME_TO_FULL_AVG, &time_to_full) ||
+				!MPSY_PROP(TIME_TO_FULL_NOW, &time_to_full))
+			info->time = time_to_full.intval / 60;
+		else
+			info->time = calculate_time(status.intval);
+	} else {
+		if (!MPSY_PROP(TIME_TO_EMPTY_AVG, &time_to_empty) ||
+			      !MPSY_PROP(TIME_TO_EMPTY_NOW, &time_to_empty))
+			info->time = time_to_empty.intval / 60;
+		else
+			info->time = calculate_time(status.intval);
+	}
+
+	mutex_unlock(&apm_mutex);
+}
+
+static int __init apm_battery_init(void)
+{
+	printk(KERN_INFO "APM Battery Driver\n");
+
+	apm_get_power_status = apm_battery_apm_get_power_status;
+	return 0;
+}
+
+static void __exit apm_battery_exit(void)
+{
+	apm_get_power_status = NULL;
+}
+
+module_init(apm_battery_init);
+module_exit(apm_battery_exit);
+
+MODULE_AUTHOR("Eugeny Boger <eugenyboger@dgap.mipt.ru>");
+MODULE_DESCRIPTION("APM emulation driver for battery monitoring class");
+MODULE_LICENSE("GPL");

kernel/drivers/power/bq27x00_battery.c

@@ -0,0 +1,381 @@
+/*
+ * BQ27x00 battery driver
+ *
+ * Copyright (C) 2008 Rodolfo Giometti <giometti@linux.it>
+ * Copyright (C) 2008 Eurotech S.p.A. <info@eurotech.it>
+ *
+ * Based on a previous work by Copyright (C) 2008 Texas Instruments, Inc.
+ *
+ * This package is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+#include <linux/module.h>
+#include <linux/param.h>
+#include <linux/jiffies.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/idr.h>
+#include <linux/i2c.h>
+#include <asm/unaligned.h>
+
+#define DRIVER_VERSION			"1.0.0"
+
+#define BQ27x00_REG_TEMP		0x06
+#define BQ27x00_REG_VOLT		0x08
+#define BQ27x00_REG_RSOC		0x0B /* Relative State-of-Charge */
+#define BQ27x00_REG_AI			0x14
+#define BQ27x00_REG_FLAGS		0x0A
+
+/* If the system has several batteries we need a different name for each
+ * of them...
+ */
+static DEFINE_IDR(battery_id);
+static DEFINE_MUTEX(battery_mutex);
+
+struct bq27x00_device_info;
+struct bq27x00_access_methods {
+	int (*read)(u8 reg, int *rt_value, int b_single,
+		struct bq27x00_device_info *di);
+};
+
+struct bq27x00_device_info {
+	struct device 		*dev;
+	int			id;
+	int			voltage_uV;
+	int			current_uA;
+	int			temp_C;
+	int			charge_rsoc;
+	struct bq27x00_access_methods	*bus;
+	struct power_supply	bat;
+
+	struct i2c_client	*client;
+};
+
+static enum power_supply_property bq27x00_battery_props[] = {
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_TEMP,
+};
+
+/*
+ * Common code for BQ27x00 devices
+ */
+
+static int bq27x00_read(u8 reg, int *rt_value, int b_single,
+			struct bq27x00_device_info *di)
+{
+	int ret;
+
+	ret = di->bus->read(reg, rt_value, b_single, di);
+	*rt_value = be16_to_cpu(*rt_value);
+
+	return ret;
+}
+
+/*
+ * Return the battery temperature in Celsius degrees
+ * Or < 0 if something fails.
+ */
+static int bq27x00_battery_temperature(struct bq27x00_device_info *di)
+{
+	int ret;
+	int temp = 0;
+
+	ret = bq27x00_read(BQ27x00_REG_TEMP, &temp, 0, di);
+	if (ret) {
+		dev_err(di->dev, "error reading temperature\n");
+		return ret;
+	}
+
+	return (temp >> 2) - 273;
+}
+
+/*
+ * Return the battery Voltage in milivolts
+ * Or < 0 if something fails.
+ */
+static int bq27x00_battery_voltage(struct bq27x00_device_info *di)
+{
+	int ret;
+	int volt = 0;
+
+	ret = bq27x00_read(BQ27x00_REG_VOLT, &volt, 0, di);
+	if (ret) {
+		dev_err(di->dev, "error reading voltage\n");
+		return ret;
+	}
+
+	return volt;
+}
+
+/*
+ * Return the battery average current
+ * Note that current can be negative signed as well
+ * Or 0 if something fails.
+ */
+static int bq27x00_battery_current(struct bq27x00_device_info *di)
+{
+	int ret;
+	int curr = 0;
+	int flags = 0;
+
+	ret = bq27x00_read(BQ27x00_REG_AI, &curr, 0, di);
+	if (ret) {
+		dev_err(di->dev, "error reading current\n");
+		return 0;
+	}
+	ret = bq27x00_read(BQ27x00_REG_FLAGS, &flags, 0, di);
+	if (ret < 0) {
+		dev_err(di->dev, "error reading flags\n");
+		return 0;
+	}
+	if ((flags & (1 << 7)) != 0) {
+		dev_dbg(di->dev, "negative current!\n");
+		return -curr;
+	}
+	return curr;
+}
+
+/*
+ * Return the battery Relative State-of-Charge
+ * Or < 0 if something fails.
+ */
+static int bq27x00_battery_rsoc(struct bq27x00_device_info *di)
+{
+	int ret;
+	int rsoc = 0;
+
+	ret = bq27x00_read(BQ27x00_REG_RSOC, &rsoc, 1, di);
+	if (ret) {
+		dev_err(di->dev, "error reading relative State-of-Charge\n");
+		return ret;
+	}
+
+	return rsoc >> 8;
+}
+
+#define to_bq27x00_device_info(x) container_of((x), \
+				struct bq27x00_device_info, bat);
+
+static int bq27x00_battery_get_property(struct power_supply *psy,
+					enum power_supply_property psp,
+					union power_supply_propval *val)
+{
+	struct bq27x00_device_info *di = to_bq27x00_device_info(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = bq27x00_battery_voltage(di);
+		if (psp == POWER_SUPPLY_PROP_PRESENT)
+			val->intval = val->intval <= 0 ? 0 : 1;
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		val->intval = bq27x00_battery_current(di);
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY:
+		val->intval = bq27x00_battery_rsoc(di);
+		break;
+	case POWER_SUPPLY_PROP_TEMP:
+		val->intval = bq27x00_battery_temperature(di);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void bq27x00_powersupply_init(struct bq27x00_device_info *di)
+{
+	di->bat.type = POWER_SUPPLY_TYPE_BATTERY;
+	di->bat.properties = bq27x00_battery_props;
+	di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props);
+	di->bat.get_property = bq27x00_battery_get_property;
+	di->bat.external_power_changed = NULL;
+}
+
+/*
+ * BQ27200 specific code
+ */
+
+static int bq27200_read(u8 reg, int *rt_value, int b_single,
+			struct bq27x00_device_info *di)
+{
+	struct i2c_client *client = di->client;
+	struct i2c_msg msg[1];
+	unsigned char data[2];
+	int err;
+
+	if (!client->adapter)
+		return -ENODEV;
+
+	msg->addr = client->addr;
+	msg->flags = 0;
+	msg->len = 1;
+	msg->buf = data;
+
+	data[0] = reg;
+	err = i2c_transfer(client->adapter, msg, 1);
+
+	if (err >= 0) {
+		if (!b_single)
+			msg->len = 2;
+		else
+			msg->len = 1;
+
+		msg->flags = I2C_M_RD;
+		err = i2c_transfer(client->adapter, msg, 1);
+		if (err >= 0) {
+			if (!b_single)
+				*rt_value = get_unaligned_be16(data);
+			else
+				*rt_value = data[0];
+
+			return 0;
+		}
+	}
+	return err;
+}
+
+static int bq27200_battery_probe(struct i2c_client *client,
+				 const struct i2c_device_id *id)
+{
+	char *name;
+	struct bq27x00_device_info *di;
+	struct bq27x00_access_methods *bus;
+	int num;
+	int retval = 0;
+
+	/* Get new ID for the new battery device */
+	retval = idr_pre_get(&battery_id, GFP_KERNEL);
+	if (retval == 0)
+		return -ENOMEM;
+	mutex_lock(&battery_mutex);
+	retval = idr_get_new(&battery_id, client, &num);
+	mutex_unlock(&battery_mutex);
+	if (retval < 0)
+		return retval;
+
+	name = kasprintf(GFP_KERNEL, "bq27200-%d", num);
+	if (!name) {
+		dev_err(&client->dev, "failed to allocate device name\n");
+		retval = -ENOMEM;
+		goto batt_failed_1;
+	}
+
+	di = kzalloc(sizeof(*di), GFP_KERNEL);
+	if (!di) {
+		dev_err(&client->dev, "failed to allocate device info data\n");
+		retval = -ENOMEM;
+		goto batt_failed_2;
+	}
+	di->id = num;
+
+	bus = kzalloc(sizeof(*bus), GFP_KERNEL);
+	if (!bus) {
+		dev_err(&client->dev, "failed to allocate access method "
+					"data\n");
+		retval = -ENOMEM;
+		goto batt_failed_3;
+	}
+
+	i2c_set_clientdata(client, di);
+	di->dev = &client->dev;
+	di->bat.name = name;
+	bus->read = &bq27200_read;
+	di->bus = bus;
+	di->client = client;
+
+	bq27x00_powersupply_init(di);
+
+	retval = power_supply_register(&client->dev, &di->bat);
+	if (retval) {
+		dev_err(&client->dev, "failed to register battery\n");
+		goto batt_failed_4;
+	}
+
+	dev_info(&client->dev, "support ver. %s enabled\n", DRIVER_VERSION);
+
+	return 0;
+
+batt_failed_4:
+	kfree(bus);
+batt_failed_3:
+	kfree(di);
+batt_failed_2:
+	kfree(name);
+batt_failed_1:
+	mutex_lock(&battery_mutex);
+	idr_remove(&battery_id, num);
+	mutex_unlock(&battery_mutex);
+
+	return retval;
+}
+
+static int bq27200_battery_remove(struct i2c_client *client)
+{
+	struct bq27x00_device_info *di = i2c_get_clientdata(client);
+
+	power_supply_unregister(&di->bat);
+
+	kfree(di->bat.name);
+
+	mutex_lock(&battery_mutex);
+	idr_remove(&battery_id, di->id);
+	mutex_unlock(&battery_mutex);
+
+	kfree(di);
+
+	return 0;
+}
+
+/*
+ * Module stuff
+ */
+
+static const struct i2c_device_id bq27200_id[] = {
+	{ "bq27200", 0 },
+	{},
+};
+
+static struct i2c_driver bq27200_battery_driver = {
+	.driver = {
+		.name = "bq27200-battery",
+	},
+	.probe = bq27200_battery_probe,
+	.remove = bq27200_battery_remove,
+	.id_table = bq27200_id,
+};
+
+static int __init bq27x00_battery_init(void)
+{
+	int ret;
+
+	ret = i2c_add_driver(&bq27200_battery_driver);
+	if (ret)
+		printk(KERN_ERR "Unable to register BQ27200 driver\n");
+
+	return ret;
+}
+module_init(bq27x00_battery_init);
+
+static void __exit bq27x00_battery_exit(void)
+{
+	i2c_del_driver(&bq27200_battery_driver);
+}
+module_exit(bq27x00_battery_exit);
+
+MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
+MODULE_DESCRIPTION("BQ27x00 battery monitor driver");
+MODULE_LICENSE("GPL");

kernel/drivers/power/da9030_battery.c

@@ -0,0 +1,605 @@
+/*
+ * Battery charger driver for Dialog Semiconductor DA9030
+ *
+ * Copyright (C) 2008 Compulab, Ltd.
+ * 	Mike Rapoport <mike@compulab.co.il>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/device.h>
+#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/mfd/da903x.h>
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+#define DA9030_FAULT_LOG		0x0a
+#define DA9030_FAULT_LOG_OVER_TEMP	(1 << 7)
+#define DA9030_FAULT_LOG_VBAT_OVER	(1 << 4)
+
+#define DA9030_CHARGE_CONTROL		0x28
+#define DA9030_CHRG_CHARGER_ENABLE	(1 << 7)
+
+#define DA9030_ADC_MAN_CONTROL		0x30
+#define DA9030_ADC_TBATREF_ENABLE	(1 << 5)
+#define DA9030_ADC_LDO_INT_ENABLE	(1 << 4)
+
+#define DA9030_ADC_AUTO_CONTROL		0x31
+#define DA9030_ADC_TBAT_ENABLE		(1 << 5)
+#define DA9030_ADC_VBAT_IN_TXON		(1 << 4)
+#define DA9030_ADC_VCH_ENABLE		(1 << 3)
+#define DA9030_ADC_ICH_ENABLE		(1 << 2)
+#define DA9030_ADC_VBAT_ENABLE		(1 << 1)
+#define DA9030_ADC_AUTO_SLEEP_ENABLE	(1 << 0)
+
+#define DA9030_VBATMON		0x32
+#define DA9030_VBATMONTXON	0x33
+#define DA9030_TBATHIGHP	0x34
+#define DA9030_TBATHIGHN	0x35
+#define DA9030_TBATLOW		0x36
+
+#define DA9030_VBAT_RES		0x41
+#define DA9030_VBATMIN_RES	0x42
+#define DA9030_VBATMINTXON_RES	0x43
+#define DA9030_ICHMAX_RES	0x44
+#define DA9030_ICHMIN_RES	0x45
+#define DA9030_ICHAVERAGE_RES	0x46
+#define DA9030_VCHMAX_RES	0x47
+#define DA9030_VCHMIN_RES	0x48
+#define DA9030_TBAT_RES		0x49
+
+struct da9030_adc_res {
+	uint8_t vbat_res;
+	uint8_t vbatmin_res;
+	uint8_t vbatmintxon;
+	uint8_t ichmax_res;
+	uint8_t ichmin_res;
+	uint8_t ichaverage_res;
+	uint8_t vchmax_res;
+	uint8_t vchmin_res;
+	uint8_t tbat_res;
+	uint8_t adc_in4_res;
+	uint8_t adc_in5_res;
+};
+
+struct da9030_battery_thresholds {
+	int tbat_low;
+	int tbat_high;
+	int tbat_restart;
+
+	int vbat_low;
+	int vbat_crit;
+	int vbat_charge_start;
+	int vbat_charge_stop;
+	int vbat_charge_restart;
+
+	int vcharge_min;
+	int vcharge_max;
+};
+
+struct da9030_charger {
+	struct power_supply psy;
+
+	struct device *master;
+
+	struct da9030_adc_res adc;
+	struct delayed_work work;
+	unsigned int interval;
+
+	struct power_supply_info *battery_info;
+
+	struct da9030_battery_thresholds thresholds;
+
+	unsigned int charge_milliamp;
+	unsigned int charge_millivolt;
+
+	/* charger status */
+	bool chdet;
+	uint8_t fault;
+	int mA;
+	int mV;
+	bool is_on;
+
+	struct notifier_block nb;
+
+	/* platform callbacks for battery low and critical events */
+	void (*battery_low)(void);
+	void (*battery_critical)(void);
+
+	struct dentry *debug_file;
+};
+
+static inline int da9030_reg_to_mV(int reg)
+{
+	return ((reg * 2650) >> 8) + 2650;
+}
+
+static inline int da9030_millivolt_to_reg(int mV)
+{
+	return ((mV - 2650) << 8) / 2650;
+}
+
+static inline int da9030_reg_to_mA(int reg)
+{
+	return ((reg * 24000) >> 8) / 15;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static int bat_debug_show(struct seq_file *s, void *data)
+{
+	struct da9030_charger *charger = s->private;
+
+	seq_printf(s, "charger is %s\n", charger->is_on ? "on" : "off");
+	if (charger->chdet) {
+		seq_printf(s, "iset = %dmA, vset = %dmV\n",
+			   charger->mA, charger->mV);
+	}
+
+	seq_printf(s, "vbat_res = %d (%dmV)\n",
+		   charger->adc.vbat_res,
+		   da9030_reg_to_mV(charger->adc.vbat_res));
+	seq_printf(s, "vbatmin_res = %d (%dmV)\n",
+		   charger->adc.vbatmin_res,
+		   da9030_reg_to_mV(charger->adc.vbatmin_res));
+	seq_printf(s, "vbatmintxon = %d (%dmV)\n",
+		   charger->adc.vbatmintxon,
+		   da9030_reg_to_mV(charger->adc.vbatmintxon));
+	seq_printf(s, "ichmax_res = %d (%dmA)\n",
+		   charger->adc.ichmax_res,
+		   da9030_reg_to_mV(charger->adc.ichmax_res));
+	seq_printf(s, "ichmin_res = %d (%dmA)\n",
+		   charger->adc.ichmin_res,
+		   da9030_reg_to_mA(charger->adc.ichmin_res));
+	seq_printf(s, "ichaverage_res = %d (%dmA)\n",
+		   charger->adc.ichaverage_res,
+		   da9030_reg_to_mA(charger->adc.ichaverage_res));
+	seq_printf(s, "vchmax_res = %d (%dmV)\n",
+		   charger->adc.vchmax_res,
+		   da9030_reg_to_mA(charger->adc.vchmax_res));
+	seq_printf(s, "vchmin_res = %d (%dmV)\n",
+		   charger->adc.vchmin_res,
+		   da9030_reg_to_mV(charger->adc.vchmin_res));
+
+	return 0;
+}
+
+static int debug_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, bat_debug_show, inode->i_private);
+}
+
+static const struct file_operations bat_debug_fops = {
+	.open		= debug_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static struct dentry *da9030_bat_create_debugfs(struct da9030_charger *charger)
+{
+	charger->debug_file = debugfs_create_file("charger", 0666, 0, charger,
+						 &bat_debug_fops);
+	return charger->debug_file;
+}
+
+static void da9030_bat_remove_debugfs(struct da9030_charger *charger)
+{
+	debugfs_remove(charger->debug_file);
+}
+#else
+static inline struct dentry *da9030_bat_create_debugfs(struct da9030_charger *charger)
+{
+	return NULL;
+}
+static inline void da9030_bat_remove_debugfs(struct da9030_charger *charger)
+{
+}
+#endif
+
+static inline void da9030_read_adc(struct da9030_charger *charger,
+				   struct da9030_adc_res *adc)
+{
+	da903x_reads(charger->master, DA9030_VBAT_RES,
+		     sizeof(*adc), (uint8_t *)adc);
+}
+
+static void da9030_charger_update_state(struct da9030_charger *charger)
+{
+	uint8_t val;
+
+	da903x_read(charger->master, DA9030_CHARGE_CONTROL, &val);
+	charger->is_on = (val & DA9030_CHRG_CHARGER_ENABLE) ? 1 : 0;
+	charger->mA = ((val >> 3) & 0xf) * 100;
+	charger->mV = (val & 0x7) * 50 + 4000;
+
+	da9030_read_adc(charger, &charger->adc);
+	da903x_read(charger->master, DA9030_FAULT_LOG, &charger->fault);
+	charger->chdet = da903x_query_status(charger->master,
+						     DA9030_STATUS_CHDET);
+}
+
+static void da9030_set_charge(struct da9030_charger *charger, int on)
+{
+	uint8_t val;
+
+	if (on) {
+		val = DA9030_CHRG_CHARGER_ENABLE;
+		val |= (charger->charge_milliamp / 100) << 3;
+		val |= (charger->charge_millivolt - 4000) / 50;
+		charger->is_on = 1;
+	} else {
+		val = 0;
+		charger->is_on = 0;
+	}
+
+	da903x_write(charger->master, DA9030_CHARGE_CONTROL, val);
+
+	power_supply_changed(&charger->psy);
+}
+
+static void da9030_charger_check_state(struct da9030_charger *charger)
+{
+	da9030_charger_update_state(charger);
+
+	/* we wake or boot with external power on */
+	if (!charger->is_on) {
+		if ((charger->chdet) &&
+		    (charger->adc.vbat_res <
+		     charger->thresholds.vbat_charge_start)) {
+			da9030_set_charge(charger, 1);
+		}
+	} else {
+		/* Charger has been pulled out */
+		if (!charger->chdet) {
+			da9030_set_charge(charger, 0);
+			return;
+		}
+
+		if (charger->adc.vbat_res >=
+		    charger->thresholds.vbat_charge_stop) {
+			da9030_set_charge(charger, 0);
+			da903x_write(charger->master, DA9030_VBATMON,
+				       charger->thresholds.vbat_charge_restart);
+		} else if (charger->adc.vbat_res >
+			   charger->thresholds.vbat_low) {
+			/* we are charging and passed LOW_THRESH,
+			   so upate DA9030 VBAT threshold
+			 */
+			da903x_write(charger->master, DA9030_VBATMON,
+				     charger->thresholds.vbat_low);
+		}
+		if (charger->adc.vchmax_res > charger->thresholds.vcharge_max ||
+		    charger->adc.vchmin_res < charger->thresholds.vcharge_min ||
+		    /* Tempreture readings are negative */
+		    charger->adc.tbat_res < charger->thresholds.tbat_high ||
+		    charger->adc.tbat_res > charger->thresholds.tbat_low) {
+			/* disable charger */
+			da9030_set_charge(charger, 0);
+		}
+	}
+}
+
+static void da9030_charging_monitor(struct work_struct *work)
+{
+	struct da9030_charger *charger;
+
+	charger = container_of(work, struct da9030_charger, work.work);
+
+	da9030_charger_check_state(charger);
+
+	/* reschedule for the next time */
+	schedule_delayed_work(&charger->work, charger->interval);
+}
+
+static enum power_supply_property da9030_battery_props[] = {
+	POWER_SUPPLY_PROP_MODEL_NAME,
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_AVG,
+};
+
+static void da9030_battery_check_status(struct da9030_charger *charger,
+				    union power_supply_propval *val)
+{
+	if (charger->chdet) {
+		if (charger->is_on)
+			val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		else
+			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+	} else {
+		val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+	}
+}
+
+static void da9030_battery_check_health(struct da9030_charger *charger,
+				    union power_supply_propval *val)
+{
+	if (charger->fault & DA9030_FAULT_LOG_OVER_TEMP)
+		val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+	else if (charger->fault & DA9030_FAULT_LOG_VBAT_OVER)
+		val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+	else
+		val->intval = POWER_SUPPLY_HEALTH_GOOD;
+}
+
+static int da9030_battery_get_property(struct power_supply *psy,
+				   enum power_supply_property psp,
+				   union power_supply_propval *val)
+{
+	struct da9030_charger *charger;
+	charger = container_of(psy, struct da9030_charger, psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		da9030_battery_check_status(charger, val);
+		break;
+	case POWER_SUPPLY_PROP_HEALTH:
+		da9030_battery_check_health(charger, val);
+		break;
+	case POWER_SUPPLY_PROP_TECHNOLOGY:
+		val->intval = charger->battery_info->technology;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+		val->intval = charger->battery_info->voltage_max_design;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+		val->intval = charger->battery_info->voltage_min_design;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		val->intval = da9030_reg_to_mV(charger->adc.vbat_res) * 1000;
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_AVG:
+		val->intval =
+			da9030_reg_to_mA(charger->adc.ichaverage_res) * 1000;
+		break;
+	case POWER_SUPPLY_PROP_MODEL_NAME:
+		val->strval = charger->battery_info->name;
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static void da9030_battery_vbat_event(struct da9030_charger *charger)
+{
+	da9030_read_adc(charger, &charger->adc);
+
+	if (charger->is_on)
+		return;
+
+	if (charger->adc.vbat_res < charger->thresholds.vbat_low) {
+		/* set VBAT threshold for critical */
+		da903x_write(charger->master, DA9030_VBATMON,
+			     charger->thresholds.vbat_crit);
+		if (charger->battery_low)
+			charger->battery_low();
+	} else if (charger->adc.vbat_res <
+		   charger->thresholds.vbat_crit) {
+		/* notify the system of battery critical */
+		if (charger->battery_critical)
+			charger->battery_critical();
+	}
+}
+
+static int da9030_battery_event(struct notifier_block *nb, unsigned long event,
+				void *data)
+{
+	struct da9030_charger *charger =
+		container_of(nb, struct da9030_charger, nb);
+
+	switch (event) {
+	case DA9030_EVENT_CHDET:
+		cancel_delayed_work_sync(&charger->work);
+		schedule_work(&charger->work.work);
+		break;
+	case DA9030_EVENT_VBATMON:
+		da9030_battery_vbat_event(charger);
+		break;
+	case DA9030_EVENT_CHIOVER:
+	case DA9030_EVENT_TBAT:
+		da9030_set_charge(charger, 0);
+		break;
+	}
+
+	return 0;
+}
+
+static void da9030_battery_convert_thresholds(struct da9030_charger *charger,
+					      struct da9030_battery_info *pdata)
+{
+	charger->thresholds.tbat_low = pdata->tbat_low;
+	charger->thresholds.tbat_high = pdata->tbat_high;
+	charger->thresholds.tbat_restart  = pdata->tbat_restart;
+
+	charger->thresholds.vbat_low =
+		da9030_millivolt_to_reg(pdata->vbat_low);
+	charger->thresholds.vbat_crit =
+		da9030_millivolt_to_reg(pdata->vbat_crit);
+	charger->thresholds.vbat_charge_start =
+		da9030_millivolt_to_reg(pdata->vbat_charge_start);
+	charger->thresholds.vbat_charge_stop =
+		da9030_millivolt_to_reg(pdata->vbat_charge_stop);
+	charger->thresholds.vbat_charge_restart =
+		da9030_millivolt_to_reg(pdata->vbat_charge_restart);
+
+	charger->thresholds.vcharge_min =
+		da9030_millivolt_to_reg(pdata->vcharge_min);
+	charger->thresholds.vcharge_max =
+		da9030_millivolt_to_reg(pdata->vcharge_max);
+}
+
+static void da9030_battery_setup_psy(struct da9030_charger *charger)
+{
+	struct power_supply *psy = &charger->psy;
+	struct power_supply_info *info = charger->battery_info;
+
+	psy->name = info->name;
+	psy->use_for_apm = info->use_for_apm;
+	psy->type = POWER_SUPPLY_TYPE_BATTERY;
+	psy->get_property = da9030_battery_get_property;
+
+	psy->properties = da9030_battery_props;
+	psy->num_properties = ARRAY_SIZE(da9030_battery_props);
+};
+
+static int da9030_battery_charger_init(struct da9030_charger *charger)
+{
+	char v[5];
+	int ret;
+
+	v[0] = v[1] = charger->thresholds.vbat_low;
+	v[2] = charger->thresholds.tbat_high;
+	v[3] = charger->thresholds.tbat_restart;
+	v[4] = charger->thresholds.tbat_low;
+
+	ret = da903x_writes(charger->master, DA9030_VBATMON, 5, v);
+	if (ret)
+		return ret;
+
+	/*
+	 * Enable reference voltage supply for ADC from the LDO_INTERNAL
+	 * regulator. Must be set before ADC measurements can be made.
+	 */
+	ret = da903x_write(charger->master, DA9030_ADC_MAN_CONTROL,
+			   DA9030_ADC_LDO_INT_ENABLE |
+			   DA9030_ADC_TBATREF_ENABLE);
+	if (ret)
+		return ret;
+
+	/* enable auto ADC measuremnts */
+	return da903x_write(charger->master, DA9030_ADC_AUTO_CONTROL,
+			    DA9030_ADC_TBAT_ENABLE | DA9030_ADC_VBAT_IN_TXON |
+			    DA9030_ADC_VCH_ENABLE | DA9030_ADC_ICH_ENABLE |
+			    DA9030_ADC_VBAT_ENABLE |
+			    DA9030_ADC_AUTO_SLEEP_ENABLE);
+}
+
+static int da9030_battery_probe(struct platform_device *pdev)
+{
+	struct da9030_charger *charger;
+	struct da9030_battery_info *pdata = pdev->dev.platform_data;
+	int ret;
+
+	if (pdata == NULL)
+		return -EINVAL;
+
+	if (pdata->charge_milliamp >= 1500 ||
+	    pdata->charge_millivolt < 4000 ||
+	    pdata->charge_millivolt > 4350)
+		return -EINVAL;
+
+	charger = kzalloc(sizeof(*charger), GFP_KERNEL);
+	if (charger == NULL)
+		return -ENOMEM;
+
+	charger->master = pdev->dev.parent;
+
+	/* 10 seconds between monotor runs unless platfrom defines other
+	   interval */
+	charger->interval = msecs_to_jiffies(
+		(pdata->batmon_interval ? : 10) * 1000);
+
+	charger->charge_milliamp = pdata->charge_milliamp;
+	charger->charge_millivolt = pdata->charge_millivolt;
+	charger->battery_info = pdata->battery_info;
+	charger->battery_low = pdata->battery_low;
+	charger->battery_critical = pdata->battery_critical;
+
+	da9030_battery_convert_thresholds(charger, pdata);
+
+	ret = da9030_battery_charger_init(charger);
+	if (ret)
+		goto err_charger_init;
+
+	INIT_DELAYED_WORK(&charger->work, da9030_charging_monitor);
+	schedule_delayed_work(&charger->work, charger->interval);
+
+	charger->nb.notifier_call = da9030_battery_event;
+	ret = da903x_register_notifier(charger->master, &charger->nb,
+				       DA9030_EVENT_CHDET |
+				       DA9030_EVENT_VBATMON |
+				       DA9030_EVENT_CHIOVER |
+				       DA9030_EVENT_TBAT);
+	if (ret)
+		goto err_notifier;
+
+	da9030_battery_setup_psy(charger);
+	ret = power_supply_register(&pdev->dev, &charger->psy);
+	if (ret)
+		goto err_ps_register;
+
+	charger->debug_file = da9030_bat_create_debugfs(charger);
+	platform_set_drvdata(pdev, charger);
+	return 0;
+
+err_ps_register:
+	da903x_unregister_notifier(charger->master, &charger->nb,
+				   DA9030_EVENT_CHDET | DA9030_EVENT_VBATMON |
+				   DA9030_EVENT_CHIOVER | DA9030_EVENT_TBAT);
+err_notifier:
+	cancel_delayed_work(&charger->work);
+
+err_charger_init:
+	kfree(charger);
+
+	return ret;
+}
+
+static int da9030_battery_remove(struct platform_device *dev)
+{
+	struct da9030_charger *charger = platform_get_drvdata(dev);
+
+	da9030_bat_remove_debugfs(charger);
+
+	da903x_unregister_notifier(charger->master, &charger->nb,
+				   DA9030_EVENT_CHDET | DA9030_EVENT_VBATMON |
+				   DA9030_EVENT_CHIOVER | DA9030_EVENT_TBAT);
+	cancel_delayed_work_sync(&charger->work);
+	da9030_set_charge(charger, 0);
+	power_supply_unregister(&charger->psy);
+
+	kfree(charger);
+
+	return 0;
+}
+
+static struct platform_driver da903x_battery_driver = {
+	.driver	= {
+		.name	= "da903x-battery",
+		.owner	= THIS_MODULE,
+	},
+	.probe = da9030_battery_probe,
+	.remove = da9030_battery_remove,
+};
+
+static int da903x_battery_init(void)
+{
+	return platform_driver_register(&da903x_battery_driver);
+}
+
+static void da903x_battery_exit(void)
+{
+	platform_driver_unregister(&da903x_battery_driver);
+}
+
+module_init(da903x_battery_init);
+module_exit(da903x_battery_exit);
+
+MODULE_DESCRIPTION("DA9030 battery charger driver");
+MODULE_AUTHOR("Mike Rapoport, CompuLab");
+MODULE_LICENSE("GPL");

kernel/drivers/power/ds2760_battery.c

@@ -0,0 +1,589 @@
+/*
+ * Driver for batteries with DS2760 chips inside.
+ *
+ * Copyright © 2007 Anton Vorontsov
+ *	       2004-2007 Matt Reimer
+ *	       2004 Szabolcs Gyurko
+ *
+ * Use consistent with the GNU GPL is permitted,
+ * provided that this copyright notice is
+ * preserved in its entirety in all copies and derived works.
+ *
+ * Author:  Anton Vorontsov <cbou@mail.ru>
+ *	    February 2007
+ *
+ *	    Matt Reimer <mreimer@vpop.net>
+ *	    April 2004, 2005, 2007
+ *
+ *	    Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>
+ *	    September 2004
+ */
+
+#include <linux/module.h>
+#include <linux/param.h>
+#include <linux/jiffies.h>
+#include <linux/workqueue.h>
+#include <linux/pm.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+#include "../w1/w1.h"
+#include "../w1/slaves/w1_ds2760.h"
+
+struct ds2760_device_info {
+	struct device *dev;
+
+	/* DS2760 data, valid after calling ds2760_battery_read_status() */
+	unsigned long update_time;	/* jiffies when data read */
+	char raw[DS2760_DATA_SIZE];	/* raw DS2760 data */
+	int voltage_raw;		/* units of 4.88 mV */
+	int voltage_uV;			/* units of µV */
+	int current_raw;		/* units of 0.625 mA */
+	int current_uA;			/* units of µA */
+	int accum_current_raw;		/* units of 0.25 mAh */
+	int accum_current_uAh;		/* units of µAh */
+	int temp_raw;			/* units of 0.125 °C */
+	int temp_C;			/* units of 0.1 °C */
+	int rated_capacity;		/* units of µAh */
+	int rem_capacity;		/* percentage */
+	int full_active_uAh;		/* units of µAh */
+	int empty_uAh;			/* units of µAh */
+	int life_sec;			/* units of seconds */
+	int charge_status;		/* POWER_SUPPLY_STATUS_* */
+
+	int full_counter;
+	struct power_supply bat;
+	struct device *w1_dev;
+	struct workqueue_struct *monitor_wqueue;
+	struct delayed_work monitor_work;
+	struct delayed_work set_charged_work;
+};
+
+static unsigned int cache_time = 1000;
+module_param(cache_time, uint, 0644);
+MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
+
+static unsigned int pmod_enabled;
+module_param(pmod_enabled, bool, 0644);
+MODULE_PARM_DESC(pmod_enabled, "PMOD enable bit");
+
+static unsigned int rated_capacity;
+module_param(rated_capacity, uint, 0644);
+MODULE_PARM_DESC(rated_capacity, "rated battery capacity, 10*mAh or index");
+
+static unsigned int current_accum;
+module_param(current_accum, uint, 0644);
+MODULE_PARM_DESC(current_accum, "current accumulator value");
+
+/* Some batteries have their rated capacity stored a N * 10 mAh, while
+ * others use an index into this table. */
+static int rated_capacities[] = {
+	0,
+	920,	/* Samsung */
+	920,	/* BYD */
+	920,	/* Lishen */
+	920,	/* NEC */
+	1440,	/* Samsung */
+	1440,	/* BYD */
+	1440,	/* Lishen */
+	1440,	/* NEC */
+	2880,	/* Samsung */
+	2880,	/* BYD */
+	2880,	/* Lishen */
+	2880	/* NEC */
+};
+
+/* array is level at temps 0°C, 10°C, 20°C, 30°C, 40°C
+ * temp is in Celsius */
+static int battery_interpolate(int array[], int temp)
+{
+	int index, dt;
+
+	if (temp <= 0)
+		return array[0];
+	if (temp >= 40)
+		return array[4];
+
+	index = temp / 10;
+	dt    = temp % 10;
+
+	return array[index] + (((array[index + 1] - array[index]) * dt) / 10);
+}
+
+static int ds2760_battery_read_status(struct ds2760_device_info *di)
+{
+	int ret, i, start, count, scale[5];
+
+	if (di->update_time && time_before(jiffies, di->update_time +
+					   msecs_to_jiffies(cache_time)))
+		return 0;
+
+	/* The first time we read the entire contents of SRAM/EEPROM,
+	 * but after that we just read the interesting bits that change. */
+	if (di->update_time == 0) {
+		start = 0;
+		count = DS2760_DATA_SIZE;
+	} else {
+		start = DS2760_VOLTAGE_MSB;
+		count = DS2760_TEMP_LSB - start + 1;
+	}
+
+	ret = w1_ds2760_read(di->w1_dev, di->raw + start, start, count);
+	if (ret != count) {
+		dev_warn(di->dev, "call to w1_ds2760_read failed (0x%p)\n",
+			 di->w1_dev);
+		return 1;
+	}
+
+	di->update_time = jiffies;
+
+	/* DS2760 reports voltage in units of 4.88mV, but the battery class
+	 * reports in units of uV, so convert by multiplying by 4880. */
+	di->voltage_raw = (di->raw[DS2760_VOLTAGE_MSB] << 3) |
+			  (di->raw[DS2760_VOLTAGE_LSB] >> 5);
+	di->voltage_uV = di->voltage_raw * 4880;
+
+	/* DS2760 reports current in signed units of 0.625mA, but the battery
+	 * class reports in units of µA, so convert by multiplying by 625. */
+	di->current_raw =
+	    (((signed char)di->raw[DS2760_CURRENT_MSB]) << 5) |
+			  (di->raw[DS2760_CURRENT_LSB] >> 3);
+	di->current_uA = di->current_raw * 625;
+
+	/* DS2760 reports accumulated current in signed units of 0.25mAh. */
+	di->accum_current_raw =
+	    (((signed char)di->raw[DS2760_CURRENT_ACCUM_MSB]) << 8) |
+			   di->raw[DS2760_CURRENT_ACCUM_LSB];
+	di->accum_current_uAh = di->accum_current_raw * 250;
+
+	/* DS2760 reports temperature in signed units of 0.125°C, but the
+	 * battery class reports in units of 1/10 °C, so we convert by
+	 * multiplying by .125 * 10 = 1.25. */
+	di->temp_raw = (((signed char)di->raw[DS2760_TEMP_MSB]) << 3) |
+				     (di->raw[DS2760_TEMP_LSB] >> 5);
+	di->temp_C = di->temp_raw + (di->temp_raw / 4);
+
+	/* At least some battery monitors (e.g. HP iPAQ) store the battery's
+	 * maximum rated capacity. */
+	if (di->raw[DS2760_RATED_CAPACITY] < ARRAY_SIZE(rated_capacities))
+		di->rated_capacity = rated_capacities[
+			(unsigned int)di->raw[DS2760_RATED_CAPACITY]];
+	else
+		di->rated_capacity = di->raw[DS2760_RATED_CAPACITY] * 10;
+
+	di->rated_capacity *= 1000; /* convert to µAh */
+
+	/* Calculate the full level at the present temperature. */
+	di->full_active_uAh = di->raw[DS2760_ACTIVE_FULL] << 8 |
+			      di->raw[DS2760_ACTIVE_FULL + 1];
+
+	/* If the full_active_uAh value is not given, fall back to the rated
+	 * capacity. This is likely to happen when chips are not part of the
+	 * battery pack and is therefore not bootstrapped. */
+	if (di->full_active_uAh == 0)
+		di->full_active_uAh = di->rated_capacity / 1000L;
+
+	scale[0] = di->full_active_uAh;
+	for (i = 1; i < 5; i++)
+		scale[i] = scale[i - 1] + di->raw[DS2760_ACTIVE_FULL + 2 + i];
+
+	di->full_active_uAh = battery_interpolate(scale, di->temp_C / 10);
+	di->full_active_uAh *= 1000; /* convert to µAh */
+
+	/* Calculate the empty level at the present temperature. */
+	scale[4] = di->raw[DS2760_ACTIVE_EMPTY + 4];
+	for (i = 3; i >= 0; i--)
+		scale[i] = scale[i + 1] + di->raw[DS2760_ACTIVE_EMPTY + i];
+
+	di->empty_uAh = battery_interpolate(scale, di->temp_C / 10);
+	di->empty_uAh *= 1000; /* convert to µAh */
+
+	if (di->full_active_uAh == di->empty_uAh)
+		di->rem_capacity = 0;
+	else
+		/* From Maxim Application Note 131: remaining capacity =
+		 * ((ICA - Empty Value) / (Full Value - Empty Value)) x 100% */
+		di->rem_capacity = ((di->accum_current_uAh - di->empty_uAh) * 100L) /
+				    (di->full_active_uAh - di->empty_uAh);
+
+	if (di->rem_capacity < 0)
+		di->rem_capacity = 0;
+	if (di->rem_capacity > 100)
+		di->rem_capacity = 100;
+
+	if (di->current_uA < -100L)
+		di->life_sec = -((di->accum_current_uAh - di->empty_uAh) * 36L)
+					/ (di->current_uA / 100L);
+	else
+		di->life_sec = 0;
+
+	return 0;
+}
+
+static void ds2760_battery_set_current_accum(struct ds2760_device_info *di,
+					     unsigned int acr_val)
+{
+	unsigned char acr[2];
+
+	/* acr is in units of 0.25 mAh */
+	acr_val *= 4L;
+	acr_val /= 1000;
+
+	acr[0] = acr_val >> 8;
+	acr[1] = acr_val & 0xff;
+
+	if (w1_ds2760_write(di->w1_dev, acr, DS2760_CURRENT_ACCUM_MSB, 2) < 2)
+		dev_warn(di->dev, "ACR write failed\n");
+}
+
+static void ds2760_battery_update_status(struct ds2760_device_info *di)
+{
+	int old_charge_status = di->charge_status;
+
+	ds2760_battery_read_status(di);
+
+	if (di->charge_status == POWER_SUPPLY_STATUS_UNKNOWN)
+		di->full_counter = 0;
+
+	if (power_supply_am_i_supplied(&di->bat)) {
+		if (di->current_uA > 10000) {
+			di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
+			di->full_counter = 0;
+		} else if (di->current_uA < -5000) {
+			if (di->charge_status != POWER_SUPPLY_STATUS_NOT_CHARGING)
+				dev_notice(di->dev, "not enough power to "
+					   "charge\n");
+			di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+			di->full_counter = 0;
+		} else if (di->current_uA < 10000 &&
+			    di->charge_status != POWER_SUPPLY_STATUS_FULL) {
+
+			/* Don't consider the battery to be full unless
+			 * we've seen the current < 10 mA at least two
+			 * consecutive times. */
+
+			di->full_counter++;
+
+			if (di->full_counter < 2) {
+				di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
+			} else {
+				di->charge_status = POWER_SUPPLY_STATUS_FULL;
+				ds2760_battery_set_current_accum(di,
+						di->full_active_uAh);
+			}
+		}
+	} else {
+		di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
+		di->full_counter = 0;
+	}
+
+	if (di->charge_status != old_charge_status)
+		power_supply_changed(&di->bat);
+}
+
+static void ds2760_battery_write_status(struct ds2760_device_info *di,
+					char status)
+{
+	if (status == di->raw[DS2760_STATUS_REG])
+		return;
+
+	w1_ds2760_write(di->w1_dev, &status, DS2760_STATUS_WRITE_REG, 1);
+	w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
+	w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
+}
+
+static void ds2760_battery_write_rated_capacity(struct ds2760_device_info *di,
+						unsigned char rated_capacity)
+{
+	if (rated_capacity == di->raw[DS2760_RATED_CAPACITY])
+		return;
+
+	w1_ds2760_write(di->w1_dev, &rated_capacity, DS2760_RATED_CAPACITY, 1);
+	w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
+	w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
+}
+
+static void ds2760_battery_work(struct work_struct *work)
+{
+	struct ds2760_device_info *di = container_of(work,
+		struct ds2760_device_info, monitor_work.work);
+	const int interval = HZ * 60;
+
+	dev_dbg(di->dev, "%s\n", __func__);
+
+	ds2760_battery_update_status(di);
+	queue_delayed_work(di->monitor_wqueue, &di->monitor_work, interval);
+}
+
+#define to_ds2760_device_info(x) container_of((x), struct ds2760_device_info, \
+					      bat);
+
+static void ds2760_battery_external_power_changed(struct power_supply *psy)
+{
+	struct ds2760_device_info *di = to_ds2760_device_info(psy);
+
+	dev_dbg(di->dev, "%s\n", __func__);
+
+	cancel_delayed_work(&di->monitor_work);
+	queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ/10);
+}
+
+
+static void ds2760_battery_set_charged_work(struct work_struct *work)
+{
+	char bias;
+	struct ds2760_device_info *di = container_of(work,
+		struct ds2760_device_info, set_charged_work.work);
+
+	dev_dbg(di->dev, "%s\n", __func__);
+
+	ds2760_battery_read_status(di);
+
+	/* When we get notified by external circuitry that the battery is
+	 * considered fully charged now, we know that there is no current
+	 * flow any more. However, the ds2760's internal current meter is
+	 * too inaccurate to rely on - spec say something ~15% failure.
+	 * Hence, we use the current offset bias register to compensate
+	 * that error.
+	 */
+
+	if (!power_supply_am_i_supplied(&di->bat))
+		return;
+
+	bias = (signed char) di->current_raw +
+		(signed char) di->raw[DS2760_CURRENT_OFFSET_BIAS];
+
+	dev_dbg(di->dev, "%s: bias = %d\n", __func__, bias);
+
+	w1_ds2760_write(di->w1_dev, &bias, DS2760_CURRENT_OFFSET_BIAS, 1);
+	w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
+	w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
+
+	/* Write to the di->raw[] buffer directly - the CURRENT_OFFSET_BIAS
+	 * value won't be read back by ds2760_battery_read_status() */
+	di->raw[DS2760_CURRENT_OFFSET_BIAS] = bias;
+}
+
+static void ds2760_battery_set_charged(struct power_supply *psy)
+{
+	struct ds2760_device_info *di = to_ds2760_device_info(psy);
+
+	/* postpone the actual work by 20 secs. This is for debouncing GPIO
+	 * signals and to let the current value settle. See AN4188. */
+	cancel_delayed_work(&di->set_charged_work);
+	queue_delayed_work(di->monitor_wqueue, &di->set_charged_work, HZ * 20);
+}
+
+static int ds2760_battery_get_property(struct power_supply *psy,
+				       enum power_supply_property psp,
+				       union power_supply_propval *val)
+{
+	struct ds2760_device_info *di = to_ds2760_device_info(psy);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		val->intval = di->charge_status;
+		return 0;
+	default:
+		break;
+	}
+
+	ds2760_battery_read_status(di);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		val->intval = di->voltage_uV;
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		val->intval = di->current_uA;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+		val->intval = di->rated_capacity;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_FULL:
+		val->intval = di->full_active_uAh;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_EMPTY:
+		val->intval = di->empty_uAh;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_NOW:
+		val->intval = di->accum_current_uAh;
+		break;
+	case POWER_SUPPLY_PROP_TEMP:
+		val->intval = di->temp_C;
+		break;
+	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
+		val->intval = di->life_sec;
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY:
+		val->intval = di->rem_capacity;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static enum power_supply_property ds2760_battery_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+	POWER_SUPPLY_PROP_CHARGE_FULL,
+	POWER_SUPPLY_PROP_CHARGE_EMPTY,
+	POWER_SUPPLY_PROP_CHARGE_NOW,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
+	POWER_SUPPLY_PROP_CAPACITY,
+};
+
+static int ds2760_battery_probe(struct platform_device *pdev)
+{
+	char status;
+	int retval = 0;
+	struct ds2760_device_info *di;
+
+	di = kzalloc(sizeof(*di), GFP_KERNEL);
+	if (!di) {
+		retval = -ENOMEM;
+		goto di_alloc_failed;
+	}
+
+	platform_set_drvdata(pdev, di);
+
+	di->dev			= &pdev->dev;
+	di->w1_dev		= pdev->dev.parent;
+	di->bat.name		= dev_name(&pdev->dev);
+	di->bat.type		= POWER_SUPPLY_TYPE_BATTERY;
+	di->bat.properties	= ds2760_battery_props;
+	di->bat.num_properties	= ARRAY_SIZE(ds2760_battery_props);
+	di->bat.get_property	= ds2760_battery_get_property;
+	di->bat.set_charged	= ds2760_battery_set_charged;
+	di->bat.external_power_changed =
+				  ds2760_battery_external_power_changed;
+
+	di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
+
+	/* enable sleep mode feature */
+	ds2760_battery_read_status(di);
+	status = di->raw[DS2760_STATUS_REG];
+	if (pmod_enabled)
+		status |= DS2760_STATUS_PMOD;
+	else
+		status &= ~DS2760_STATUS_PMOD;
+
+	ds2760_battery_write_status(di, status);
+
+	/* set rated capacity from module param */
+	if (rated_capacity)
+		ds2760_battery_write_rated_capacity(di, rated_capacity);
+
+	/* set current accumulator if given as parameter.
+	 * this should only be done for bootstrapping the value */
+	if (current_accum)
+		ds2760_battery_set_current_accum(di, current_accum);
+
+	retval = power_supply_register(&pdev->dev, &di->bat);
+	if (retval) {
+		dev_err(di->dev, "failed to register battery\n");
+		goto batt_failed;
+	}
+
+	INIT_DELAYED_WORK(&di->monitor_work, ds2760_battery_work);
+	INIT_DELAYED_WORK(&di->set_charged_work,
+			  ds2760_battery_set_charged_work);
+	di->monitor_wqueue = create_singlethread_workqueue(dev_name(&pdev->dev));
+	if (!di->monitor_wqueue) {
+		retval = -ESRCH;
+		goto workqueue_failed;
+	}
+	queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ * 1);
+
+	goto success;
+
+workqueue_failed:
+	power_supply_unregister(&di->bat);
+batt_failed:
+	kfree(di);
+di_alloc_failed:
+success:
+	return retval;
+}
+
+static int ds2760_battery_remove(struct platform_device *pdev)
+{
+	struct ds2760_device_info *di = platform_get_drvdata(pdev);
+
+	cancel_rearming_delayed_workqueue(di->monitor_wqueue,
+					  &di->monitor_work);
+	cancel_rearming_delayed_workqueue(di->monitor_wqueue,
+					  &di->set_charged_work);
+	destroy_workqueue(di->monitor_wqueue);
+	power_supply_unregister(&di->bat);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int ds2760_battery_suspend(struct platform_device *pdev,
+				  pm_message_t state)
+{
+	struct ds2760_device_info *di = platform_get_drvdata(pdev);
+
+	di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
+
+	return 0;
+}
+
+static int ds2760_battery_resume(struct platform_device *pdev)
+{
+	struct ds2760_device_info *di = platform_get_drvdata(pdev);
+
+	di->charge_status = POWER_SUPPLY_STATUS_UNKNOWN;
+	power_supply_changed(&di->bat);
+
+	cancel_delayed_work(&di->monitor_work);
+	queue_delayed_work(di->monitor_wqueue, &di->monitor_work, HZ);
+
+	return 0;
+}
+
+#else
+
+#define ds2760_battery_suspend NULL
+#define ds2760_battery_resume NULL
+
+#endif /* CONFIG_PM */
+
+MODULE_ALIAS("platform:ds2760-battery");
+
+static struct platform_driver ds2760_battery_driver = {
+	.driver = {
+		.name = "ds2760-battery",
+	},
+	.probe	  = ds2760_battery_probe,
+	.remove   = ds2760_battery_remove,
+	.suspend  = ds2760_battery_suspend,
+	.resume	  = ds2760_battery_resume,
+};
+
+static int __init ds2760_battery_init(void)
+{
+	return platform_driver_register(&ds2760_battery_driver);
+}
+
+static void __exit ds2760_battery_exit(void)
+{
+	platform_driver_unregister(&ds2760_battery_driver);
+}
+
+module_init(ds2760_battery_init);
+module_exit(ds2760_battery_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>, "
+	      "Matt Reimer <mreimer@vpop.net>, "
+	      "Anton Vorontsov <cbou@mail.ru>");
+MODULE_DESCRIPTION("ds2760 battery driver");

kernel/drivers/power/ds2782_battery.c

@@ -0,0 +1,330 @@
+/*
+ * I2C client/driver for the Maxim/Dallas DS2782 Stand-Alone Fuel Gauge IC
+ *
+ * Copyright (C) 2009 Bluewater Systems Ltd
+ *
+ * Author: Ryan Mallon <ryan@bluewatersys.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/swab.h>
+#include <linux/i2c.h>
+#include <linux/idr.h>
+#include <linux/power_supply.h>
+
+#define DS2782_REG_RARC		0x06	/* Remaining active relative capacity */
+
+#define DS2782_REG_VOLT_MSB	0x0c
+#define DS2782_REG_TEMP_MSB	0x0a
+#define DS2782_REG_CURRENT_MSB	0x0e
+
+/* EEPROM Block */
+#define DS2782_REG_RSNSP	0x69	/* Sense resistor value */
+
+/* Current unit measurement in uA for a 1 milli-ohm sense resistor */
+#define DS2782_CURRENT_UNITS	1563
+
+#define to_ds2782_info(x) container_of(x, struct ds2782_info, battery)
+
+struct ds2782_info {
+	struct i2c_client	*client;
+	struct power_supply	battery;
+	int			id;
+};
+
+static DEFINE_IDR(battery_id);
+static DEFINE_MUTEX(battery_lock);
+
+static inline int ds2782_read_reg(struct ds2782_info *info, int reg, u8 *val)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(info->client, reg);
+	if (ret < 0) {
+		dev_err(&info->client->dev, "register read failed\n");
+		return ret;
+	}
+
+	*val = ret;
+	return 0;
+}
+
+static inline int ds2782_read_reg16(struct ds2782_info *info, int reg_msb,
+				    s16 *val)
+{
+	int ret;
+
+	ret = swab16(i2c_smbus_read_word_data(info->client, reg_msb));
+	if (ret < 0) {
+		dev_err(&info->client->dev, "register read failed\n");
+		return ret;
+	}
+
+	*val = ret;
+	return 0;
+}
+
+static int ds2782_get_temp(struct ds2782_info *info, int *temp)
+{
+	s16 raw;
+	int err;
+
+	/*
+	 * Temperature is measured in units of 0.125 degrees celcius, the
+	 * power_supply class measures temperature in tenths of degrees
+	 * celsius. The temperature value is stored as a 10 bit number, plus
+	 * sign in the upper bits of a 16 bit register.
+	 */
+	err = ds2782_read_reg16(info, DS2782_REG_TEMP_MSB, &raw);
+	if (err)
+		return err;
+	*temp = ((raw / 32) * 125) / 100;
+	return 0;
+}
+
+static int ds2782_get_current(struct ds2782_info *info, int *current_uA)
+{
+	int sense_res;
+	int err;
+	u8 sense_res_raw;
+	s16 raw;
+
+	/*
+	 * The units of measurement for current are dependent on the value of
+	 * the sense resistor.
+	 */
+	err = ds2782_read_reg(info, DS2782_REG_RSNSP, &sense_res_raw);
+	if (err)
+		return err;
+	if (sense_res_raw == 0) {
+		dev_err(&info->client->dev, "sense resistor value is 0\n");
+		return -ENXIO;
+	}
+	sense_res = 1000 / sense_res_raw;
+
+	dev_dbg(&info->client->dev, "sense resistor = %d milli-ohms\n",
+		sense_res);
+	err = ds2782_read_reg16(info, DS2782_REG_CURRENT_MSB, &raw);
+	if (err)
+		return err;
+	*current_uA = raw * (DS2782_CURRENT_UNITS / sense_res);
+	return 0;
+}
+
+static int ds2782_get_voltage(struct ds2782_info *info, int *voltage_uA)
+{
+	s16 raw;
+	int err;
+
+	/*
+	 * Voltage is measured in units of 4.88mV. The voltage is stored as
+	 * a 10-bit number plus sign, in the upper bits of a 16-bit register
+	 */
+	err = ds2782_read_reg16(info, DS2782_REG_VOLT_MSB, &raw);
+	if (err)
+		return err;
+	*voltage_uA = (raw / 32) * 4800;
+	return 0;
+}
+
+static int ds2782_get_capacity(struct ds2782_info *info, int *capacity)
+{
+	int err;
+	u8 raw;
+
+	err = ds2782_read_reg(info, DS2782_REG_RARC, &raw);
+	if (err)
+		return err;
+	*capacity = raw;
+	return raw;
+}
+
+static int ds2782_get_status(struct ds2782_info *info, int *status)
+{
+	int err;
+	int current_uA;
+	int capacity;
+
+	err = ds2782_get_current(info, &current_uA);
+	if (err)
+		return err;
+
+	err = ds2782_get_capacity(info, &capacity);
+	if (err)
+		return err;
+
+	if (capacity == 100)
+		*status = POWER_SUPPLY_STATUS_FULL;
+	else if (current_uA == 0)
+		*status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+	else if (current_uA < 0)
+		*status = POWER_SUPPLY_STATUS_DISCHARGING;
+	else
+		*status = POWER_SUPPLY_STATUS_CHARGING;
+
+	return 0;
+}
+
+static int ds2782_battery_get_property(struct power_supply *psy,
+				       enum power_supply_property prop,
+				       union power_supply_propval *val)
+{
+	struct ds2782_info *info = to_ds2782_info(psy);
+	int ret;
+
+	switch (prop) {
+	case POWER_SUPPLY_PROP_STATUS:
+		ret = ds2782_get_status(info, &val->intval);
+		break;
+
+	case POWER_SUPPLY_PROP_CAPACITY:
+		ret = ds2782_get_capacity(info, &val->intval);
+		break;
+
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = ds2782_get_voltage(info, &val->intval);
+		break;
+
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		ret = ds2782_get_current(info, &val->intval);
+		break;
+
+	case POWER_SUPPLY_PROP_TEMP:
+		ret = ds2782_get_temp(info, &val->intval);
+		break;
+
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static enum power_supply_property ds2782_battery_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_TEMP,
+};
+
+static void ds2782_power_supply_init(struct power_supply *battery)
+{
+	battery->type			= POWER_SUPPLY_TYPE_BATTERY;
+	battery->properties		= ds2782_battery_props;
+	battery->num_properties		= ARRAY_SIZE(ds2782_battery_props);
+	battery->get_property		= ds2782_battery_get_property;
+	battery->external_power_changed	= NULL;
+}
+
+static int ds2782_battery_remove(struct i2c_client *client)
+{
+	struct ds2782_info *info = i2c_get_clientdata(client);
+
+	power_supply_unregister(&info->battery);
+	kfree(info->battery.name);
+
+	mutex_lock(&battery_lock);
+	idr_remove(&battery_id, info->id);
+	mutex_unlock(&battery_lock);
+
+	i2c_set_clientdata(client, info);
+
+	kfree(info);
+	return 0;
+}
+
+static int ds2782_battery_probe(struct i2c_client *client,
+				const struct i2c_device_id *id)
+{
+	struct ds2782_info *info;
+	int ret;
+	int num;
+
+	/* Get an ID for this battery */
+	ret = idr_pre_get(&battery_id, GFP_KERNEL);
+	if (ret == 0) {
+		ret = -ENOMEM;
+		goto fail_id;
+	}
+
+	mutex_lock(&battery_lock);
+	ret = idr_get_new(&battery_id, client, &num);
+	mutex_unlock(&battery_lock);
+	if (ret < 0)
+		goto fail_id;
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info) {
+		ret = -ENOMEM;
+		goto fail_info;
+	}
+
+	info->battery.name = kasprintf(GFP_KERNEL, "ds2782-%d", num);
+	if (!info->battery.name) {
+		ret = -ENOMEM;
+		goto fail_name;
+	}
+
+	i2c_set_clientdata(client, info);
+	info->client = client;
+	ds2782_power_supply_init(&info->battery);
+
+	ret = power_supply_register(&client->dev, &info->battery);
+	if (ret) {
+		dev_err(&client->dev, "failed to register battery\n");
+		goto fail_register;
+	}
+
+	return 0;
+
+fail_register:
+	kfree(info->battery.name);
+fail_name:
+	i2c_set_clientdata(client, info);
+	kfree(info);
+fail_info:
+	mutex_lock(&battery_lock);
+	idr_remove(&battery_id, num);
+	mutex_unlock(&battery_lock);
+fail_id:
+	return ret;
+}
+
+static const struct i2c_device_id ds2782_id[] = {
+	{"ds2782", 0},
+	{},
+};
+
+static struct i2c_driver ds2782_battery_driver = {
+	.driver 	= {
+		.name	= "ds2782-battery",
+	},
+	.probe		= ds2782_battery_probe,
+	.remove		= ds2782_battery_remove,
+	.id_table	= ds2782_id,
+};
+
+static int __init ds2782_init(void)
+{
+	return i2c_add_driver(&ds2782_battery_driver);
+}
+module_init(ds2782_init);
+
+static void __exit ds2782_exit(void)
+{
+	i2c_del_driver(&ds2782_battery_driver);
+}
+module_exit(ds2782_exit);
+
+MODULE_AUTHOR("Ryan Mallon <ryan@bluewatersys.com>");
+MODULE_DESCRIPTION("Maxim/Dallas DS2782 Stand-Alone Fuel Gauage IC driver");
+MODULE_LICENSE("GPL");

kernel/drivers/power/max17040_battery.c

@@ -0,0 +1,309 @@
+/*
+ *  max17040_battery.c
+ *  fuel-gauge systems for lithium-ion (Li+) batteries
+ *
+ *  Copyright (C) 2009 Samsung Electronics
+ *  Minkyu Kang <mk7.kang@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/power_supply.h>
+#include <linux/max17040_battery.h>
+
+#define MAX17040_VCELL_MSB	0x02
+#define MAX17040_VCELL_LSB	0x03
+#define MAX17040_SOC_MSB	0x04
+#define MAX17040_SOC_LSB	0x05
+#define MAX17040_MODE_MSB	0x06
+#define MAX17040_MODE_LSB	0x07
+#define MAX17040_VER_MSB	0x08
+#define MAX17040_VER_LSB	0x09
+#define MAX17040_RCOMP_MSB	0x0C
+#define MAX17040_RCOMP_LSB	0x0D
+#define MAX17040_CMD_MSB	0xFE
+#define MAX17040_CMD_LSB	0xFF
+
+#define MAX17040_DELAY		1000
+#define MAX17040_BATTERY_FULL	95
+
+struct max17040_chip {
+	struct i2c_client		*client;
+	struct delayed_work		work;
+	struct power_supply		battery;
+	struct max17040_platform_data	*pdata;
+
+	/* State Of Connect */
+	int online;
+	/* battery voltage */
+	int vcell;
+	/* battery capacity */
+	int soc;
+	/* State Of Charge */
+	int status;
+};
+
+static int max17040_get_property(struct power_supply *psy,
+			    enum power_supply_property psp,
+			    union power_supply_propval *val)
+{
+	struct max17040_chip *chip = container_of(psy,
+				struct max17040_chip, battery);
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		val->intval = chip->status;
+		break;
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = chip->online;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		val->intval = chip->vcell;
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY:
+		val->intval = chip->soc;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int max17040_write_reg(struct i2c_client *client, int reg, u8 value)
+{
+	int ret;
+
+	ret = i2c_smbus_write_byte_data(client, reg, value);
+
+	if (ret < 0)
+		dev_err(&client->dev, "%s: err %d\n", __func__, ret);
+
+	return ret;
+}
+
+static int max17040_read_reg(struct i2c_client *client, int reg)
+{
+	int ret;
+
+	ret = i2c_smbus_read_byte_data(client, reg);
+
+	if (ret < 0)
+		dev_err(&client->dev, "%s: err %d\n", __func__, ret);
+
+	return ret;
+}
+
+static void max17040_reset(struct i2c_client *client)
+{
+	max17040_write_reg(client, MAX17040_CMD_MSB, 0x54);
+	max17040_write_reg(client, MAX17040_CMD_LSB, 0x00);
+}
+
+static void max17040_get_vcell(struct i2c_client *client)
+{
+	struct max17040_chip *chip = i2c_get_clientdata(client);
+	u8 msb;
+	u8 lsb;
+
+	msb = max17040_read_reg(client, MAX17040_VCELL_MSB);
+	lsb = max17040_read_reg(client, MAX17040_VCELL_LSB);
+
+	chip->vcell = (msb << 4) + (lsb >> 4);
+}
+
+static void max17040_get_soc(struct i2c_client *client)
+{
+	struct max17040_chip *chip = i2c_get_clientdata(client);
+	u8 msb;
+	u8 lsb;
+
+	msb = max17040_read_reg(client, MAX17040_SOC_MSB);
+	lsb = max17040_read_reg(client, MAX17040_SOC_LSB);
+
+	chip->soc = msb;
+}
+
+static void max17040_get_version(struct i2c_client *client)
+{
+	u8 msb;
+	u8 lsb;
+
+	msb = max17040_read_reg(client, MAX17040_VER_MSB);
+	lsb = max17040_read_reg(client, MAX17040_VER_LSB);
+
+	dev_info(&client->dev, "MAX17040 Fuel-Gauge Ver %d%d\n", msb, lsb);
+}
+
+static void max17040_get_online(struct i2c_client *client)
+{
+	struct max17040_chip *chip = i2c_get_clientdata(client);
+
+	if (chip->pdata->battery_online)
+		chip->online = chip->pdata->battery_online();
+	else
+		chip->online = 1;
+}
+
+static void max17040_get_status(struct i2c_client *client)
+{
+	struct max17040_chip *chip = i2c_get_clientdata(client);
+
+	if (!chip->pdata->charger_online || !chip->pdata->charger_enable) {
+		chip->status = POWER_SUPPLY_STATUS_UNKNOWN;
+		return;
+	}
+
+	if (chip->pdata->charger_online()) {
+		if (chip->pdata->charger_enable())
+			chip->status = POWER_SUPPLY_STATUS_CHARGING;
+		else
+			chip->status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+	} else {
+		chip->status = POWER_SUPPLY_STATUS_DISCHARGING;
+	}
+
+	if (chip->soc > MAX17040_BATTERY_FULL)
+		chip->status = POWER_SUPPLY_STATUS_FULL;
+}
+
+static void max17040_work(struct work_struct *work)
+{
+	struct max17040_chip *chip;
+
+	chip = container_of(work, struct max17040_chip, work.work);
+
+	max17040_get_vcell(chip->client);
+	max17040_get_soc(chip->client);
+	max17040_get_online(chip->client);
+	max17040_get_status(chip->client);
+
+	schedule_delayed_work(&chip->work, MAX17040_DELAY);
+}
+
+static enum power_supply_property max17040_battery_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_CAPACITY,
+};
+
+static int __devinit max17040_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
+	struct max17040_chip *chip;
+	int ret;
+
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
+		return -EIO;
+
+	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	chip->client = client;
+	chip->pdata = client->dev.platform_data;
+
+	i2c_set_clientdata(client, chip);
+
+	chip->battery.name		= "battery";
+	chip->battery.type		= POWER_SUPPLY_TYPE_BATTERY;
+	chip->battery.get_property	= max17040_get_property;
+	chip->battery.properties	= max17040_battery_props;
+	chip->battery.num_properties	= ARRAY_SIZE(max17040_battery_props);
+
+	ret = power_supply_register(&client->dev, &chip->battery);
+	if (ret) {
+		dev_err(&client->dev, "failed: power supply register\n");
+		i2c_set_clientdata(client, NULL);
+		kfree(chip);
+		return ret;
+	}
+
+	max17040_reset(client);
+	max17040_get_version(client);
+
+	INIT_DELAYED_WORK_DEFERRABLE(&chip->work, max17040_work);
+	schedule_delayed_work(&chip->work, MAX17040_DELAY);
+
+	return 0;
+}
+
+static int __devexit max17040_remove(struct i2c_client *client)
+{
+	struct max17040_chip *chip = i2c_get_clientdata(client);
+
+	power_supply_unregister(&chip->battery);
+	cancel_delayed_work(&chip->work);
+	i2c_set_clientdata(client, NULL);
+	kfree(chip);
+	return 0;
+}
+
+#ifdef CONFIG_PM
+
+static int max17040_suspend(struct i2c_client *client,
+		pm_message_t state)
+{
+	struct max17040_chip *chip = i2c_get_clientdata(client);
+
+	cancel_delayed_work(&chip->work);
+	return 0;
+}
+
+static int max17040_resume(struct i2c_client *client)
+{
+	struct max17040_chip *chip = i2c_get_clientdata(client);
+
+	schedule_delayed_work(&chip->work, MAX17040_DELAY);
+	return 0;
+}
+
+#else
+
+#define max17040_suspend NULL
+#define max17040_resume NULL
+
+#endif /* CONFIG_PM */
+
+static const struct i2c_device_id max17040_id[] = {
+	{ "max17040", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, max17040_id);
+
+static struct i2c_driver max17040_i2c_driver = {
+	.driver	= {
+		.name	= "max17040",
+	},
+	.probe		= max17040_probe,
+	.remove		= __devexit_p(max17040_remove),
+	.suspend	= max17040_suspend,
+	.resume		= max17040_resume,
+	.id_table	= max17040_id,
+};
+
+static int __init max17040_init(void)
+{
+	return i2c_add_driver(&max17040_i2c_driver);
+}
+module_init(max17040_init);
+
+static void __exit max17040_exit(void)
+{
+	i2c_del_driver(&max17040_i2c_driver);
+}
+module_exit(max17040_exit);
+
+MODULE_AUTHOR("Minkyu Kang <mk7.kang@samsung.com>");
+MODULE_DESCRIPTION("MAX17040 Fuel Gauge");
+MODULE_LICENSE("GPL");

kernel/drivers/power/olpc_battery.c

@@ -0,0 +1,511 @@
+/*
+ * Battery driver for One Laptop Per Child board.
+ *
+ *	Copyright © 2006  David Woodhouse <dwmw2@infradead.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/jiffies.h>
+#include <linux/sched.h>
+#include <asm/olpc.h>
+
+
+#define EC_BAT_VOLTAGE	0x10	/* uint16_t,	*9.76/32,    mV   */
+#define EC_BAT_CURRENT	0x11	/* int16_t,	*15.625/120, mA   */
+#define EC_BAT_ACR	0x12	/* int16_t,	*6250/15,    µAh  */
+#define EC_BAT_TEMP	0x13	/* uint16_t,	*100/256,   °C  */
+#define EC_AMB_TEMP	0x14	/* uint16_t,	*100/256,   °C  */
+#define EC_BAT_STATUS	0x15	/* uint8_t,	bitmask */
+#define EC_BAT_SOC	0x16	/* uint8_t,	percentage */
+#define EC_BAT_SERIAL	0x17	/* uint8_t[6] */
+#define EC_BAT_EEPROM	0x18	/* uint8_t adr as input, uint8_t output */
+#define EC_BAT_ERRCODE	0x1f	/* uint8_t,	bitmask */
+
+#define BAT_STAT_PRESENT	0x01
+#define BAT_STAT_FULL		0x02
+#define BAT_STAT_LOW		0x04
+#define BAT_STAT_DESTROY	0x08
+#define BAT_STAT_AC		0x10
+#define BAT_STAT_CHARGING	0x20
+#define BAT_STAT_DISCHARGING	0x40
+#define BAT_STAT_TRICKLE	0x80
+
+#define BAT_ERR_INFOFAIL	0x02
+#define BAT_ERR_OVERVOLTAGE	0x04
+#define BAT_ERR_OVERTEMP	0x05
+#define BAT_ERR_GAUGESTOP	0x06
+#define BAT_ERR_OUT_OF_CONTROL	0x07
+#define BAT_ERR_ID_FAIL		0x09
+#define BAT_ERR_ACR_FAIL	0x10
+
+#define BAT_ADDR_MFR_TYPE	0x5F
+
+/*********************************************************************
+ *		Power
+ *********************************************************************/
+
+static int olpc_ac_get_prop(struct power_supply *psy,
+			    enum power_supply_property psp,
+			    union power_supply_propval *val)
+{
+	int ret = 0;
+	uint8_t status;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
+		if (ret)
+			return ret;
+
+		val->intval = !!(status & BAT_STAT_AC);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static enum power_supply_property olpc_ac_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+};
+
+static struct power_supply olpc_ac = {
+	.name = "olpc-ac",
+	.type = POWER_SUPPLY_TYPE_MAINS,
+	.properties = olpc_ac_props,
+	.num_properties = ARRAY_SIZE(olpc_ac_props),
+	.get_property = olpc_ac_get_prop,
+};
+
+static char bat_serial[17]; /* Ick */
+
+static int olpc_bat_get_status(union power_supply_propval *val, uint8_t ec_byte)
+{
+	if (olpc_platform_info.ecver > 0x44) {
+		if (ec_byte & (BAT_STAT_CHARGING | BAT_STAT_TRICKLE))
+			val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		else if (ec_byte & BAT_STAT_DISCHARGING)
+			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+		else if (ec_byte & BAT_STAT_FULL)
+			val->intval = POWER_SUPPLY_STATUS_FULL;
+		else /* er,... */
+			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+	} else {
+		/* Older EC didn't report charge/discharge bits */
+		if (!(ec_byte & BAT_STAT_AC)) /* No AC means discharging */
+			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+		else if (ec_byte & BAT_STAT_FULL)
+			val->intval = POWER_SUPPLY_STATUS_FULL;
+		else /* Not _necessarily_ true but EC doesn't tell all yet */
+			val->intval = POWER_SUPPLY_STATUS_CHARGING;
+	}
+
+	return 0;
+}
+
+static int olpc_bat_get_health(union power_supply_propval *val)
+{
+	uint8_t ec_byte;
+	int ret;
+
+	ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
+	if (ret)
+		return ret;
+
+	switch (ec_byte) {
+	case 0:
+		val->intval = POWER_SUPPLY_HEALTH_GOOD;
+		break;
+
+	case BAT_ERR_OVERTEMP:
+		val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
+		break;
+
+	case BAT_ERR_OVERVOLTAGE:
+		val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+		break;
+
+	case BAT_ERR_INFOFAIL:
+	case BAT_ERR_OUT_OF_CONTROL:
+	case BAT_ERR_ID_FAIL:
+	case BAT_ERR_ACR_FAIL:
+		val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+		break;
+
+	default:
+		/* Eep. We don't know this failure code */
+		ret = -EIO;
+	}
+
+	return ret;
+}
+
+static int olpc_bat_get_mfr(union power_supply_propval *val)
+{
+	uint8_t ec_byte;
+	int ret;
+
+	ec_byte = BAT_ADDR_MFR_TYPE;
+	ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
+	if (ret)
+		return ret;
+
+	switch (ec_byte >> 4) {
+	case 1:
+		val->strval = "Gold Peak";
+		break;
+	case 2:
+		val->strval = "BYD";
+		break;
+	default:
+		val->strval = "Unknown";
+		break;
+	}
+
+	return ret;
+}
+
+static int olpc_bat_get_tech(union power_supply_propval *val)
+{
+	uint8_t ec_byte;
+	int ret;
+
+	ec_byte = BAT_ADDR_MFR_TYPE;
+	ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &ec_byte, 1);
+	if (ret)
+		return ret;
+
+	switch (ec_byte & 0xf) {
+	case 1:
+		val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH;
+		break;
+	case 2:
+		val->intval = POWER_SUPPLY_TECHNOLOGY_LiFe;
+		break;
+	default:
+		val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
+		break;
+	}
+
+	return ret;
+}
+
+/*********************************************************************
+ *		Battery properties
+ *********************************************************************/
+static int olpc_bat_get_property(struct power_supply *psy,
+				 enum power_supply_property psp,
+				 union power_supply_propval *val)
+{
+	int ret = 0;
+	__be16 ec_word;
+	uint8_t ec_byte;
+	__be64 ser_buf;
+
+	ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &ec_byte, 1);
+	if (ret)
+		return ret;
+
+	/* Theoretically there's a race here -- the battery could be
+	   removed immediately after we check whether it's present, and
+	   then we query for some other property of the now-absent battery.
+	   It doesn't matter though -- the EC will return the last-known
+	   information, and it's as if we just ran that _little_ bit faster
+	   and managed to read it out before the battery went away. */
+	if (!(ec_byte & (BAT_STAT_PRESENT | BAT_STAT_TRICKLE)) &&
+			psp != POWER_SUPPLY_PROP_PRESENT)
+		return -ENODEV;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		ret = olpc_bat_get_status(val, ec_byte);
+		if (ret)
+			return ret;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		if (ec_byte & BAT_STAT_TRICKLE)
+			val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+		else if (ec_byte & BAT_STAT_CHARGING)
+			val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
+		else
+			val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = !!(ec_byte & (BAT_STAT_PRESENT |
+					    BAT_STAT_TRICKLE));
+		break;
+
+	case POWER_SUPPLY_PROP_HEALTH:
+		if (ec_byte & BAT_STAT_DESTROY)
+			val->intval = POWER_SUPPLY_HEALTH_DEAD;
+		else {
+			ret = olpc_bat_get_health(val);
+			if (ret)
+				return ret;
+		}
+		break;
+
+	case POWER_SUPPLY_PROP_MANUFACTURER:
+		ret = olpc_bat_get_mfr(val);
+		if (ret)
+			return ret;
+		break;
+	case POWER_SUPPLY_PROP_TECHNOLOGY:
+		ret = olpc_bat_get_tech(val);
+		if (ret)
+			return ret;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+		ret = olpc_ec_cmd(EC_BAT_VOLTAGE, NULL, 0, (void *)&ec_word, 2);
+		if (ret)
+			return ret;
+
+		val->intval = (s16)be16_to_cpu(ec_word) * 9760L / 32;
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_AVG:
+		ret = olpc_ec_cmd(EC_BAT_CURRENT, NULL, 0, (void *)&ec_word, 2);
+		if (ret)
+			return ret;
+
+		val->intval = (s16)be16_to_cpu(ec_word) * 15625L / 120;
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY:
+		ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1);
+		if (ret)
+			return ret;
+		val->intval = ec_byte;
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+		if (ec_byte & BAT_STAT_FULL)
+			val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+		else if (ec_byte & BAT_STAT_LOW)
+			val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+		else
+			val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+		break;
+	case POWER_SUPPLY_PROP_TEMP:
+		ret = olpc_ec_cmd(EC_BAT_TEMP, NULL, 0, (void *)&ec_word, 2);
+		if (ret)
+			return ret;
+
+		val->intval = (s16)be16_to_cpu(ec_word) * 100 / 256;
+		break;
+	case POWER_SUPPLY_PROP_TEMP_AMBIENT:
+		ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2);
+		if (ret)
+			return ret;
+
+		val->intval = (int)be16_to_cpu(ec_word) * 100 / 256;
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_COUNTER:
+		ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2);
+		if (ret)
+			return ret;
+
+		val->intval = (s16)be16_to_cpu(ec_word) * 6250 / 15;
+		break;
+	case POWER_SUPPLY_PROP_SERIAL_NUMBER:
+		ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8);
+		if (ret)
+			return ret;
+
+		sprintf(bat_serial, "%016llx", (long long)be64_to_cpu(ser_buf));
+		val->strval = bat_serial;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static enum power_supply_property olpc_bat_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+	POWER_SUPPLY_PROP_VOLTAGE_AVG,
+	POWER_SUPPLY_PROP_CURRENT_AVG,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_TEMP_AMBIENT,
+	POWER_SUPPLY_PROP_MANUFACTURER,
+	POWER_SUPPLY_PROP_SERIAL_NUMBER,
+	POWER_SUPPLY_PROP_CHARGE_COUNTER,
+};
+
+/* EEPROM reading goes completely around the power_supply API, sadly */
+
+#define EEPROM_START	0x20
+#define EEPROM_END	0x80
+#define EEPROM_SIZE	(EEPROM_END - EEPROM_START)
+
+static ssize_t olpc_bat_eeprom_read(struct kobject *kobj,
+		struct bin_attribute *attr, char *buf, loff_t off, size_t count)
+{
+	uint8_t ec_byte;
+	int ret;
+	int i;
+
+	if (off >= EEPROM_SIZE)
+		return 0;
+	if (off + count > EEPROM_SIZE)
+		count = EEPROM_SIZE - off;
+
+	for (i = 0; i < count; i++) {
+		ec_byte = EEPROM_START + off + i;
+		ret = olpc_ec_cmd(EC_BAT_EEPROM, &ec_byte, 1, &buf[i], 1);
+		if (ret) {
+			pr_err("olpc-battery: "
+			       "EC_BAT_EEPROM cmd @ 0x%x failed - %d!\n",
+			       ec_byte, ret);
+			return -EIO;
+		}
+	}
+
+	return count;
+}
+
+static struct bin_attribute olpc_bat_eeprom = {
+	.attr = {
+		.name = "eeprom",
+		.mode = S_IRUGO,
+		.owner = THIS_MODULE,
+	},
+	.size = 0,
+	.read = olpc_bat_eeprom_read,
+};
+
+/* Allow userspace to see the specific error value pulled from the EC */
+
+static ssize_t olpc_bat_error_read(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	uint8_t ec_byte;
+	ssize_t ret;
+
+	ret = olpc_ec_cmd(EC_BAT_ERRCODE, NULL, 0, &ec_byte, 1);
+	if (ret < 0)
+		return ret;
+
+	return sprintf(buf, "%d\n", ec_byte);
+}
+
+static struct device_attribute olpc_bat_error = {
+	.attr = {
+		.name = "error",
+		.mode = S_IRUGO,
+	},
+	.show = olpc_bat_error_read,
+};
+
+/*********************************************************************
+ *		Initialisation
+ *********************************************************************/
+
+static struct platform_device *bat_pdev;
+
+static struct power_supply olpc_bat = {
+	.properties = olpc_bat_props,
+	.num_properties = ARRAY_SIZE(olpc_bat_props),
+	.get_property = olpc_bat_get_property,
+	.use_for_apm = 1,
+};
+
+void olpc_battery_trigger_uevent(unsigned long cause)
+{
+	if (cause & EC_SCI_SRC_ACPWR)
+		kobject_uevent(&olpc_ac.dev->kobj, KOBJ_CHANGE);
+	if (cause & (EC_SCI_SRC_BATERR|EC_SCI_SRC_BATSOC|EC_SCI_SRC_BATTERY))
+		kobject_uevent(&olpc_bat.dev->kobj, KOBJ_CHANGE);
+}
+
+static int __init olpc_bat_init(void)
+{
+	int ret = 0;
+	uint8_t status;
+
+	if (!olpc_platform_info.ecver)
+		return -ENXIO;
+
+	/*
+	 * We've seen a number of EC protocol changes; this driver requires
+	 * the latest EC protocol, supported by 0x44 and above.
+	 */
+	if (olpc_platform_info.ecver < 0x44) {
+		printk(KERN_NOTICE "OLPC EC version 0x%02x too old for "
+			"battery driver.\n", olpc_platform_info.ecver);
+		return -ENXIO;
+	}
+
+	ret = olpc_ec_cmd(EC_BAT_STATUS, NULL, 0, &status, 1);
+	if (ret)
+		return ret;
+
+	/* Ignore the status. It doesn't actually matter */
+
+	bat_pdev = platform_device_register_simple("olpc-battery", 0, NULL, 0);
+	if (IS_ERR(bat_pdev))
+		return PTR_ERR(bat_pdev);
+
+	ret = power_supply_register(&bat_pdev->dev, &olpc_ac);
+	if (ret)
+		goto ac_failed;
+
+	olpc_bat.name = bat_pdev->name;
+
+	ret = power_supply_register(&bat_pdev->dev, &olpc_bat);
+	if (ret)
+		goto battery_failed;
+
+	ret = device_create_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
+	if (ret)
+		goto eeprom_failed;
+
+	ret = device_create_file(olpc_bat.dev, &olpc_bat_error);
+	if (ret)
+		goto error_failed;
+
+	goto success;
+
+error_failed:
+	device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
+eeprom_failed:
+	power_supply_unregister(&olpc_bat);
+battery_failed:
+	power_supply_unregister(&olpc_ac);
+ac_failed:
+	platform_device_unregister(bat_pdev);
+success:
+	return ret;
+}
+
+static void __exit olpc_bat_exit(void)
+{
+	device_remove_file(olpc_bat.dev, &olpc_bat_error);
+	device_remove_bin_file(olpc_bat.dev, &olpc_bat_eeprom);
+	power_supply_unregister(&olpc_bat);
+	power_supply_unregister(&olpc_ac);
+	platform_device_unregister(bat_pdev);
+}
+
+module_init(olpc_bat_init);
+module_exit(olpc_bat_exit);
+
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Battery driver for One Laptop Per Child 'XO' machine");

kernel/drivers/power/pcf50633-charger.c

@@ -0,0 +1,413 @@
+/* NXP PCF50633 Main Battery Charger Driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Balaji Rao <balajirrao@openmoko.org>
+ * All rights reserved.
+ *
+ * Broken down from monstrous PCF50633 driver mainly by
+ * Harald Welte, Andy Green and Werner Almesberger
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/device.h>
+#include <linux/sysfs.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+#include <linux/mfd/pcf50633/core.h>
+#include <linux/mfd/pcf50633/mbc.h>
+
+struct pcf50633_mbc {
+	struct pcf50633 *pcf;
+
+	int adapter_active;
+	int adapter_online;
+	int usb_active;
+	int usb_online;
+
+	struct power_supply usb;
+	struct power_supply adapter;
+
+	struct delayed_work charging_restart_work;
+};
+
+int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
+{
+	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
+	int ret = 0;
+	u8 bits;
+	int charging_start = 1;
+	u8 mbcs2, chgmod;
+
+	if (ma >= 1000)
+		bits = PCF50633_MBCC7_USB_1000mA;
+	else if (ma >= 500)
+		bits = PCF50633_MBCC7_USB_500mA;
+	else if (ma >= 100)
+		bits = PCF50633_MBCC7_USB_100mA;
+	else {
+		bits = PCF50633_MBCC7_USB_SUSPEND;
+		charging_start = 0;
+	}
+
+	ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
+					PCF50633_MBCC7_USB_MASK, bits);
+	if (ret)
+		dev_err(pcf->dev, "error setting usb curlim to %d mA\n", ma);
+	else
+		dev_info(pcf->dev, "usb curlim to %d mA\n", ma);
+
+	/* Manual charging start */
+	mbcs2 = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
+	chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
+
+	/* If chgmod == BATFULL, setting chgena has no effect.
+	 * We need to set resume instead.
+	 */
+	if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
+		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
+				PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
+	else
+		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
+				PCF50633_MBCC1_RESUME, PCF50633_MBCC1_RESUME);
+
+	mbc->usb_active = charging_start;
+
+	power_supply_changed(&mbc->usb);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set);
+
+int pcf50633_mbc_get_status(struct pcf50633 *pcf)
+{
+	struct pcf50633_mbc *mbc  = platform_get_drvdata(pcf->mbc_pdev);
+	int status = 0;
+
+	if (mbc->usb_online)
+		status |= PCF50633_MBC_USB_ONLINE;
+	if (mbc->usb_active)
+		status |= PCF50633_MBC_USB_ACTIVE;
+	if (mbc->adapter_online)
+		status |= PCF50633_MBC_ADAPTER_ONLINE;
+	if (mbc->adapter_active)
+		status |= PCF50633_MBC_ADAPTER_ACTIVE;
+
+	return status;
+}
+EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);
+
+static ssize_t
+show_chgmode(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
+
+	u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
+	u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
+
+	return sprintf(buf, "%d\n", chgmod);
+}
+static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL);
+
+static ssize_t
+show_usblim(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
+	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
+						PCF50633_MBCC7_USB_MASK;
+	unsigned int ma;
+
+	if (usblim == PCF50633_MBCC7_USB_1000mA)
+		ma = 1000;
+	else if (usblim == PCF50633_MBCC7_USB_500mA)
+		ma = 500;
+	else if (usblim == PCF50633_MBCC7_USB_100mA)
+		ma = 100;
+	else
+		ma = 0;
+
+	return sprintf(buf, "%u\n", ma);
+}
+
+static ssize_t set_usblim(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
+	unsigned long ma;
+	int ret;
+
+	ret = strict_strtoul(buf, 10, &ma);
+	if (ret)
+		return -EINVAL;
+
+	pcf50633_mbc_usb_curlim_set(mbc->pcf, ma);
+
+	return count;
+}
+
+static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, set_usblim);
+
+static struct attribute *pcf50633_mbc_sysfs_entries[] = {
+	&dev_attr_chgmode.attr,
+	&dev_attr_usb_curlim.attr,
+	NULL,
+};
+
+static struct attribute_group mbc_attr_group = {
+	.name	= NULL,			/* put in device directory */
+	.attrs	= pcf50633_mbc_sysfs_entries,
+};
+
+/* MBC state machine switches into charging mode when the battery voltage
+ * falls below 96% of a battery float voltage. But the voltage drop in Li-ion
+ * batteries is marginal(1~2 %) till about 80% of its capacity - which means,
+ * after a BATFULL, charging won't be restarted until 80%.
+ *
+ * This work_struct function restarts charging at regular intervals to make
+ * sure we don't discharge too much
+ */
+
+static void pcf50633_mbc_charging_restart(struct work_struct *work)
+{
+	struct pcf50633_mbc *mbc;
+	u8 mbcs2, chgmod;
+
+	mbc = container_of(work, struct pcf50633_mbc,
+				charging_restart_work.work);
+
+	mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
+	chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
+
+	if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
+		return;
+
+	/* Restart charging */
+	pcf50633_reg_set_bit_mask(mbc->pcf, PCF50633_REG_MBCC1,
+				PCF50633_MBCC1_RESUME, PCF50633_MBCC1_RESUME);
+	mbc->usb_active = 1;
+	power_supply_changed(&mbc->usb);
+
+	dev_info(mbc->pcf->dev, "Charging restarted\n");
+}
+
+static void
+pcf50633_mbc_irq_handler(int irq, void *data)
+{
+	struct pcf50633_mbc *mbc = data;
+	int chg_restart_interval =
+			mbc->pcf->pdata->charging_restart_interval;
+
+	/* USB */
+	if (irq == PCF50633_IRQ_USBINS) {
+		mbc->usb_online = 1;
+	} else if (irq == PCF50633_IRQ_USBREM) {
+		mbc->usb_online = 0;
+		mbc->usb_active = 0;
+		pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
+		cancel_delayed_work_sync(&mbc->charging_restart_work);
+	}
+
+	/* Adapter */
+	if (irq == PCF50633_IRQ_ADPINS) {
+		mbc->adapter_online = 1;
+		mbc->adapter_active = 1;
+	} else if (irq == PCF50633_IRQ_ADPREM) {
+		mbc->adapter_online = 0;
+		mbc->adapter_active = 0;
+	}
+
+	if (irq == PCF50633_IRQ_BATFULL) {
+		mbc->usb_active = 0;
+		mbc->adapter_active = 0;
+
+		if (chg_restart_interval > 0)
+			schedule_delayed_work(&mbc->charging_restart_work,
+							chg_restart_interval);
+	} else if (irq == PCF50633_IRQ_USBLIMON)
+		mbc->usb_active = 0;
+	else if (irq == PCF50633_IRQ_USBLIMOFF)
+		mbc->usb_active = 1;
+
+	power_supply_changed(&mbc->usb);
+	power_supply_changed(&mbc->adapter);
+
+	if (mbc->pcf->pdata->mbc_event_callback)
+		mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq);
+}
+
+static int adapter_get_property(struct power_supply *psy,
+			enum power_supply_property psp,
+			union power_supply_propval *val)
+{
+	struct pcf50633_mbc *mbc = container_of(psy,
+				struct pcf50633_mbc, adapter);
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval =  mbc->adapter_online;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static int usb_get_property(struct power_supply *psy,
+			enum power_supply_property psp,
+			union power_supply_propval *val)
+{
+	struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = mbc->usb_online;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static enum power_supply_property power_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+};
+
+static const u8 mbc_irq_handlers[] = {
+	PCF50633_IRQ_ADPINS,
+	PCF50633_IRQ_ADPREM,
+	PCF50633_IRQ_USBINS,
+	PCF50633_IRQ_USBREM,
+	PCF50633_IRQ_BATFULL,
+	PCF50633_IRQ_CHGHALT,
+	PCF50633_IRQ_THLIMON,
+	PCF50633_IRQ_THLIMOFF,
+	PCF50633_IRQ_USBLIMON,
+	PCF50633_IRQ_USBLIMOFF,
+	PCF50633_IRQ_LOWSYS,
+	PCF50633_IRQ_LOWBAT,
+};
+
+static int __devinit pcf50633_mbc_probe(struct platform_device *pdev)
+{
+	struct pcf50633_mbc *mbc;
+	struct pcf50633_subdev_pdata *pdata = pdev->dev.platform_data;
+	int ret;
+	int i;
+	u8 mbcs1;
+
+	mbc = kzalloc(sizeof(*mbc), GFP_KERNEL);
+	if (!mbc)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, mbc);
+	mbc->pcf = pdata->pcf;
+
+	/* Set up IRQ handlers */
+	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
+		pcf50633_register_irq(mbc->pcf, mbc_irq_handlers[i],
+					pcf50633_mbc_irq_handler, mbc);
+
+	/* Create power supplies */
+	mbc->adapter.name		= "adapter";
+	mbc->adapter.type		= POWER_SUPPLY_TYPE_MAINS;
+	mbc->adapter.properties		= power_props;
+	mbc->adapter.num_properties	= ARRAY_SIZE(power_props);
+	mbc->adapter.get_property	= &adapter_get_property;
+	mbc->adapter.supplied_to	= mbc->pcf->pdata->batteries;
+	mbc->adapter.num_supplicants	= mbc->pcf->pdata->num_batteries;
+
+	mbc->usb.name			= "usb";
+	mbc->usb.type			= POWER_SUPPLY_TYPE_USB;
+	mbc->usb.properties		= power_props;
+	mbc->usb.num_properties		= ARRAY_SIZE(power_props);
+	mbc->usb.get_property		= usb_get_property;
+	mbc->usb.supplied_to		= mbc->pcf->pdata->batteries;
+	mbc->usb.num_supplicants	= mbc->pcf->pdata->num_batteries;
+
+	ret = power_supply_register(&pdev->dev, &mbc->adapter);
+	if (ret) {
+		dev_err(mbc->pcf->dev, "failed to register adapter\n");
+		kfree(mbc);
+		return ret;
+	}
+
+	ret = power_supply_register(&pdev->dev, &mbc->usb);
+	if (ret) {
+		dev_err(mbc->pcf->dev, "failed to register usb\n");
+		power_supply_unregister(&mbc->adapter);
+		kfree(mbc);
+		return ret;
+	}
+
+	INIT_DELAYED_WORK(&mbc->charging_restart_work,
+				pcf50633_mbc_charging_restart);
+
+	ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
+	if (ret)
+		dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");
+
+	mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1);
+	if (mbcs1 & PCF50633_MBCS1_USBPRES)
+		pcf50633_mbc_irq_handler(PCF50633_IRQ_USBINS, mbc);
+	if (mbcs1 & PCF50633_MBCS1_ADAPTPRES)
+		pcf50633_mbc_irq_handler(PCF50633_IRQ_ADPINS, mbc);
+
+	return 0;
+}
+
+static int __devexit pcf50633_mbc_remove(struct platform_device *pdev)
+{
+	struct pcf50633_mbc *mbc = platform_get_drvdata(pdev);
+	int i;
+
+	/* Remove IRQ handlers */
+	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
+		pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);
+
+	power_supply_unregister(&mbc->usb);
+	power_supply_unregister(&mbc->adapter);
+
+	cancel_delayed_work_sync(&mbc->charging_restart_work);
+
+	kfree(mbc);
+
+	return 0;
+}
+
+static struct platform_driver pcf50633_mbc_driver = {
+	.driver = {
+		.name = "pcf50633-mbc",
+	},
+	.probe = pcf50633_mbc_probe,
+	.remove = __devexit_p(pcf50633_mbc_remove),
+};
+
+static int __init pcf50633_mbc_init(void)
+{
+	return platform_driver_register(&pcf50633_mbc_driver);
+}
+module_init(pcf50633_mbc_init);
+
+static void __exit pcf50633_mbc_exit(void)
+{
+	platform_driver_unregister(&pcf50633_mbc_driver);
+}
+module_exit(pcf50633_mbc_exit);
+
+MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
+MODULE_DESCRIPTION("PCF50633 mbc driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pcf50633-mbc");

kernel/drivers/power/pda_power.c

@@ -0,0 +1,458 @@
+/*
+ * Common power driver for PDAs and phones with one or two external
+ * power supplies (AC/USB) connected to main and backup batteries,
+ * and optional builtin charger.
+ *
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/power_supply.h>
+#include <linux/pda_power.h>
+#include <linux/regulator/consumer.h>
+#include <linux/timer.h>
+#include <linux/jiffies.h>
+#include <linux/usb/otg.h>
+
+static inline unsigned int get_irq_flags(struct resource *res)
+{
+	unsigned int flags = IRQF_SAMPLE_RANDOM | IRQF_SHARED;
+
+	flags |= res->flags & IRQF_TRIGGER_MASK;
+
+	return flags;
+}
+
+static struct device *dev;
+static struct pda_power_pdata *pdata;
+static struct resource *ac_irq, *usb_irq;
+static struct timer_list charger_timer;
+static struct timer_list supply_timer;
+static struct timer_list polling_timer;
+static int polling;
+
+#ifdef CONFIG_USB_OTG_UTILS
+static struct otg_transceiver *transceiver;
+#endif
+static struct regulator *ac_draw;
+
+enum {
+	PDA_PSY_OFFLINE = 0,
+	PDA_PSY_ONLINE = 1,
+	PDA_PSY_TO_CHANGE,
+};
+static int new_ac_status = -1;
+static int new_usb_status = -1;
+static int ac_status = -1;
+static int usb_status = -1;
+
+static int pda_power_get_property(struct power_supply *psy,
+				  enum power_supply_property psp,
+				  union power_supply_propval *val)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		if (psy->type == POWER_SUPPLY_TYPE_MAINS)
+			val->intval = pdata->is_ac_online ?
+				      pdata->is_ac_online() : 0;
+		else
+			val->intval = pdata->is_usb_online ?
+				      pdata->is_usb_online() : 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static enum power_supply_property pda_power_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+};
+
+static char *pda_power_supplied_to[] = {
+	"main-battery",
+	"backup-battery",
+};
+
+static struct power_supply pda_psy_ac = {
+	.name = "ac",
+	.type = POWER_SUPPLY_TYPE_MAINS,
+	.supplied_to = pda_power_supplied_to,
+	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
+	.properties = pda_power_props,
+	.num_properties = ARRAY_SIZE(pda_power_props),
+	.get_property = pda_power_get_property,
+};
+
+static struct power_supply pda_psy_usb = {
+	.name = "usb",
+	.type = POWER_SUPPLY_TYPE_USB,
+	.supplied_to = pda_power_supplied_to,
+	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
+	.properties = pda_power_props,
+	.num_properties = ARRAY_SIZE(pda_power_props),
+	.get_property = pda_power_get_property,
+};
+
+static void update_status(void)
+{
+	if (pdata->is_ac_online)
+		new_ac_status = !!pdata->is_ac_online();
+
+	if (pdata->is_usb_online)
+		new_usb_status = !!pdata->is_usb_online();
+}
+
+static void update_charger(void)
+{
+	static int regulator_enabled;
+	int max_uA = pdata->ac_max_uA;
+
+	if (pdata->set_charge) {
+		if (new_ac_status > 0) {
+			dev_dbg(dev, "charger on (AC)\n");
+			pdata->set_charge(PDA_POWER_CHARGE_AC);
+		} else if (new_usb_status > 0) {
+			dev_dbg(dev, "charger on (USB)\n");
+			pdata->set_charge(PDA_POWER_CHARGE_USB);
+		} else {
+			dev_dbg(dev, "charger off\n");
+			pdata->set_charge(0);
+		}
+	} else if (ac_draw) {
+		if (new_ac_status > 0) {
+			regulator_set_current_limit(ac_draw, max_uA, max_uA);
+			if (!regulator_enabled) {
+				dev_dbg(dev, "charger on (AC)\n");
+				regulator_enable(ac_draw);
+				regulator_enabled = 1;
+			}
+		} else {
+			if (regulator_enabled) {
+				dev_dbg(dev, "charger off\n");
+				regulator_disable(ac_draw);
+				regulator_enabled = 0;
+			}
+		}
+	}
+}
+
+static void supply_timer_func(unsigned long unused)
+{
+	if (ac_status == PDA_PSY_TO_CHANGE) {
+		ac_status = new_ac_status;
+		power_supply_changed(&pda_psy_ac);
+	}
+
+	if (usb_status == PDA_PSY_TO_CHANGE) {
+		usb_status = new_usb_status;
+		power_supply_changed(&pda_psy_usb);
+	}
+}
+
+static void psy_changed(void)
+{
+	update_charger();
+
+	/*
+	 * Okay, charger set. Now wait a bit before notifying supplicants,
+	 * charge power should stabilize.
+	 */
+	mod_timer(&supply_timer,
+		  jiffies + msecs_to_jiffies(pdata->wait_for_charger));
+}
+
+static void charger_timer_func(unsigned long unused)
+{
+	update_status();
+	psy_changed();
+}
+
+static irqreturn_t power_changed_isr(int irq, void *power_supply)
+{
+	if (power_supply == &pda_psy_ac)
+		ac_status = PDA_PSY_TO_CHANGE;
+	else if (power_supply == &pda_psy_usb)
+		usb_status = PDA_PSY_TO_CHANGE;
+	else
+		return IRQ_NONE;
+
+	/*
+	 * Wait a bit before reading ac/usb line status and setting charger,
+	 * because ac/usb status readings may lag from irq.
+	 */
+	mod_timer(&charger_timer,
+		  jiffies + msecs_to_jiffies(pdata->wait_for_status));
+
+	return IRQ_HANDLED;
+}
+
+static void polling_timer_func(unsigned long unused)
+{
+	int changed = 0;
+
+	dev_dbg(dev, "polling...\n");
+
+	update_status();
+
+	if (!ac_irq && new_ac_status != ac_status) {
+		ac_status = PDA_PSY_TO_CHANGE;
+		changed = 1;
+	}
+
+	if (!usb_irq && new_usb_status != usb_status) {
+		usb_status = PDA_PSY_TO_CHANGE;
+		changed = 1;
+	}
+
+	if (changed)
+		psy_changed();
+
+	mod_timer(&polling_timer,
+		  jiffies + msecs_to_jiffies(pdata->polling_interval));
+}
+
+#ifdef CONFIG_USB_OTG_UTILS
+static int otg_is_usb_online(void)
+{
+	return (transceiver->state == OTG_STATE_B_PERIPHERAL);
+}
+#endif
+
+static int pda_power_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+
+	dev = &pdev->dev;
+
+	if (pdev->id != -1) {
+		dev_err(dev, "it's meaningless to register several "
+			"pda_powers; use id = -1\n");
+		ret = -EINVAL;
+		goto wrongid;
+	}
+
+	pdata = pdev->dev.platform_data;
+
+	if (pdata->init) {
+		ret = pdata->init(dev);
+		if (ret < 0)
+			goto init_failed;
+	}
+
+	update_status();
+	update_charger();
+
+	if (!pdata->wait_for_status)
+		pdata->wait_for_status = 500;
+
+	if (!pdata->wait_for_charger)
+		pdata->wait_for_charger = 500;
+
+	if (!pdata->polling_interval)
+		pdata->polling_interval = 2000;
+
+	if (!pdata->ac_max_uA)
+		pdata->ac_max_uA = 500000;
+
+	setup_timer(&charger_timer, charger_timer_func, 0);
+	setup_timer(&supply_timer, supply_timer_func, 0);
+
+	ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac");
+	usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb");
+
+	if (pdata->supplied_to) {
+		pda_psy_ac.supplied_to = pdata->supplied_to;
+		pda_psy_ac.num_supplicants = pdata->num_supplicants;
+		pda_psy_usb.supplied_to = pdata->supplied_to;
+		pda_psy_usb.num_supplicants = pdata->num_supplicants;
+	}
+
+	ac_draw = regulator_get(dev, "ac_draw");
+	if (IS_ERR(ac_draw)) {
+		dev_dbg(dev, "couldn't get ac_draw regulator\n");
+		ac_draw = NULL;
+		ret = PTR_ERR(ac_draw);
+	}
+
+	if (pdata->is_ac_online) {
+		ret = power_supply_register(&pdev->dev, &pda_psy_ac);
+		if (ret) {
+			dev_err(dev, "failed to register %s power supply\n",
+				pda_psy_ac.name);
+			goto ac_supply_failed;
+		}
+
+		if (ac_irq) {
+			ret = request_irq(ac_irq->start, power_changed_isr,
+					  get_irq_flags(ac_irq), ac_irq->name,
+					  &pda_psy_ac);
+			if (ret) {
+				dev_err(dev, "request ac irq failed\n");
+				goto ac_irq_failed;
+			}
+		} else {
+			polling = 1;
+		}
+	}
+
+#ifdef CONFIG_USB_OTG_UTILS
+	transceiver = otg_get_transceiver();
+	if (transceiver && !pdata->is_usb_online) {
+		pdata->is_usb_online = otg_is_usb_online;
+	}
+#endif
+
+	if (pdata->is_usb_online) {
+		ret = power_supply_register(&pdev->dev, &pda_psy_usb);
+		if (ret) {
+			dev_err(dev, "failed to register %s power supply\n",
+				pda_psy_usb.name);
+			goto usb_supply_failed;
+		}
+
+		if (usb_irq) {
+			ret = request_irq(usb_irq->start, power_changed_isr,
+					  get_irq_flags(usb_irq),
+					  usb_irq->name, &pda_psy_usb);
+			if (ret) {
+				dev_err(dev, "request usb irq failed\n");
+				goto usb_irq_failed;
+			}
+		} else {
+			polling = 1;
+		}
+	}
+
+	if (polling) {
+		dev_dbg(dev, "will poll for status\n");
+		setup_timer(&polling_timer, polling_timer_func, 0);
+		mod_timer(&polling_timer,
+			  jiffies + msecs_to_jiffies(pdata->polling_interval));
+	}
+
+	if (ac_irq || usb_irq)
+		device_init_wakeup(&pdev->dev, 1);
+
+	return 0;
+
+usb_irq_failed:
+	if (pdata->is_usb_online)
+		power_supply_unregister(&pda_psy_usb);
+usb_supply_failed:
+	if (pdata->is_ac_online && ac_irq)
+		free_irq(ac_irq->start, &pda_psy_ac);
+#ifdef CONFIG_USB_OTG_UTILS
+	if (transceiver)
+		otg_put_transceiver(transceiver);
+#endif
+ac_irq_failed:
+	if (pdata->is_ac_online)
+		power_supply_unregister(&pda_psy_ac);
+ac_supply_failed:
+	if (ac_draw) {
+		regulator_put(ac_draw);
+		ac_draw = NULL;
+	}
+	if (pdata->exit)
+		pdata->exit(dev);
+init_failed:
+wrongid:
+	return ret;
+}
+
+static int pda_power_remove(struct platform_device *pdev)
+{
+	if (pdata->is_usb_online && usb_irq)
+		free_irq(usb_irq->start, &pda_psy_usb);
+	if (pdata->is_ac_online && ac_irq)
+		free_irq(ac_irq->start, &pda_psy_ac);
+
+	if (polling)
+		del_timer_sync(&polling_timer);
+	del_timer_sync(&charger_timer);
+	del_timer_sync(&supply_timer);
+
+	if (pdata->is_usb_online)
+		power_supply_unregister(&pda_psy_usb);
+	if (pdata->is_ac_online)
+		power_supply_unregister(&pda_psy_ac);
+#ifdef CONFIG_USB_OTG_UTILS
+	if (transceiver)
+		otg_put_transceiver(transceiver);
+#endif
+	if (ac_draw) {
+		regulator_put(ac_draw);
+		ac_draw = NULL;
+	}
+	if (pdata->exit)
+		pdata->exit(dev);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int ac_wakeup_enabled;
+static int usb_wakeup_enabled;
+
+static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	if (device_may_wakeup(&pdev->dev)) {
+		if (ac_irq)
+			ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
+		if (usb_irq)
+			usb_wakeup_enabled = !enable_irq_wake(usb_irq->start);
+	}
+
+	return 0;
+}
+
+static int pda_power_resume(struct platform_device *pdev)
+{
+	if (device_may_wakeup(&pdev->dev)) {
+		if (usb_irq && usb_wakeup_enabled)
+			disable_irq_wake(usb_irq->start);
+		if (ac_irq && ac_wakeup_enabled)
+			disable_irq_wake(ac_irq->start);
+	}
+
+	return 0;
+}
+#else
+#define pda_power_suspend NULL
+#define pda_power_resume NULL
+#endif /* CONFIG_PM */
+
+MODULE_ALIAS("platform:pda-power");
+
+static struct platform_driver pda_power_pdrv = {
+	.driver = {
+		.name = "pda-power",
+	},
+	.probe = pda_power_probe,
+	.remove = pda_power_remove,
+	.suspend = pda_power_suspend,
+	.resume = pda_power_resume,
+};
+
+static int __init pda_power_init(void)
+{
+	return platform_driver_register(&pda_power_pdrv);
+}
+
+static void __exit pda_power_exit(void)
+{
+	platform_driver_unregister(&pda_power_pdrv);
+}
+
+module_init(pda_power_init);
+module_exit(pda_power_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");

kernel/drivers/power/pmu_battery.c

@@ -0,0 +1,213 @@
+/*
+ * Battery class driver for Apple PMU
+ *
+ *	Copyright © 2006  David Woodhouse <dwmw2@infradead.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/power_supply.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+
+static struct pmu_battery_dev {
+	struct power_supply bat;
+	struct pmu_battery_info *pbi;
+	char name[16];
+	int propval;
+} *pbats[PMU_MAX_BATTERIES];
+
+#define to_pmu_battery_dev(x) container_of(x, struct pmu_battery_dev, bat)
+
+/*********************************************************************
+ *		Power
+ *********************************************************************/
+
+static int pmu_get_ac_prop(struct power_supply *psy,
+			   enum power_supply_property psp,
+			   union power_supply_propval *val)
+{
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = (!!(pmu_power_flags & PMU_PWR_AC_PRESENT)) ||
+			      (pmu_battery_count == 0);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static enum power_supply_property pmu_ac_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+};
+
+static struct power_supply pmu_ac = {
+	.name = "pmu-ac",
+	.type = POWER_SUPPLY_TYPE_MAINS,
+	.properties = pmu_ac_props,
+	.num_properties = ARRAY_SIZE(pmu_ac_props),
+	.get_property = pmu_get_ac_prop,
+};
+
+/*********************************************************************
+ *		Battery properties
+ *********************************************************************/
+
+static char *pmu_batt_types[] = {
+	"Smart", "Comet", "Hooper", "Unknown"
+};
+
+static char *pmu_bat_get_model_name(struct pmu_battery_info *pbi)
+{
+	switch (pbi->flags & PMU_BATT_TYPE_MASK) {
+	case PMU_BATT_TYPE_SMART:
+		return pmu_batt_types[0];
+	case PMU_BATT_TYPE_COMET:
+		return pmu_batt_types[1];
+	case PMU_BATT_TYPE_HOOPER:
+		return pmu_batt_types[2];
+	default: break;
+	}
+	return pmu_batt_types[3];
+}
+
+static int pmu_bat_get_property(struct power_supply *psy,
+				enum power_supply_property psp,
+				union power_supply_propval *val)
+{
+	struct pmu_battery_dev *pbat = to_pmu_battery_dev(psy);
+	struct pmu_battery_info *pbi = pbat->pbi;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		if (pbi->flags & PMU_BATT_CHARGING)
+			val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		else
+			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = !!(pbi->flags & PMU_BATT_PRESENT);
+		break;
+	case POWER_SUPPLY_PROP_MODEL_NAME:
+		val->strval = pmu_bat_get_model_name(pbi);
+		break;
+	case POWER_SUPPLY_PROP_ENERGY_AVG:
+		val->intval = pbi->charge     * 1000; /* mWh -> µWh */
+		break;
+	case POWER_SUPPLY_PROP_ENERGY_FULL:
+		val->intval = pbi->max_charge * 1000; /* mWh -> µWh */
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_AVG:
+		val->intval = pbi->amperage   * 1000; /* mA -> µA */
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+		val->intval = pbi->voltage    * 1000; /* mV -> µV */
+		break;
+	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
+		val->intval = pbi->time_remaining;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static enum power_supply_property pmu_bat_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_MODEL_NAME,
+	POWER_SUPPLY_PROP_ENERGY_AVG,
+	POWER_SUPPLY_PROP_ENERGY_FULL,
+	POWER_SUPPLY_PROP_CURRENT_AVG,
+	POWER_SUPPLY_PROP_VOLTAGE_AVG,
+	POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
+};
+
+/*********************************************************************
+ *		Initialisation
+ *********************************************************************/
+
+static struct platform_device *bat_pdev;
+
+static int __init pmu_bat_init(void)
+{
+	int ret;
+	int i;
+
+	bat_pdev = platform_device_register_simple("pmu-battery",
+						   0, NULL, 0);
+	if (IS_ERR(bat_pdev)) {
+		ret = PTR_ERR(bat_pdev);
+		goto pdev_register_failed;
+	}
+
+	ret = power_supply_register(&bat_pdev->dev, &pmu_ac);
+	if (ret)
+		goto ac_register_failed;
+
+	for (i = 0; i < pmu_battery_count; i++) {
+		struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat),
+						       GFP_KERNEL);
+		if (!pbat)
+			break;
+
+		sprintf(pbat->name, "PMU_battery_%d", i);
+		pbat->bat.name = pbat->name;
+		pbat->bat.properties = pmu_bat_props;
+		pbat->bat.num_properties = ARRAY_SIZE(pmu_bat_props);
+		pbat->bat.get_property = pmu_bat_get_property;
+		pbat->pbi = &pmu_batteries[i];
+
+		ret = power_supply_register(&bat_pdev->dev, &pbat->bat);
+		if (ret) {
+			kfree(pbat);
+			goto battery_register_failed;
+		}
+		pbats[i] = pbat;
+	}
+
+	goto success;
+
+battery_register_failed:
+	while (i--) {
+		if (!pbats[i])
+			continue;
+		power_supply_unregister(&pbats[i]->bat);
+		kfree(pbats[i]);
+	}
+	power_supply_unregister(&pmu_ac);
+ac_register_failed:
+	platform_device_unregister(bat_pdev);
+pdev_register_failed:
+success:
+	return ret;
+}
+
+static void __exit pmu_bat_exit(void)
+{
+	int i;
+
+	for (i = 0; i < PMU_MAX_BATTERIES; i++) {
+		if (!pbats[i])
+			continue;
+		power_supply_unregister(&pbats[i]->bat);
+		kfree(pbats[i]);
+	}
+	power_supply_unregister(&pmu_ac);
+	platform_device_unregister(bat_pdev);
+}
+
+module_init(pmu_bat_init);
+module_exit(pmu_bat_exit);
+
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("PMU battery driver");

kernel/drivers/power/power_supply.h

@@ -0,0 +1,41 @@
+/*
+ *  Functions private to power supply class
+ *
+ *  Copyright © 2007  Anton Vorontsov <cbou@mail.ru>
+ *  Copyright © 2004  Szabolcs Gyurko
+ *  Copyright © 2003  Ian Molton <spyro@f2s.com>
+ *
+ *  Modified: 2004, Oct     Szabolcs Gyurko
+ *
+ *  You may use this code as per GPL version 2
+ */
+
+#ifdef CONFIG_SYSFS
+
+extern int power_supply_create_attrs(struct power_supply *psy);
+extern void power_supply_remove_attrs(struct power_supply *psy);
+extern int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env);
+
+#else
+
+static inline int power_supply_create_attrs(struct power_supply *psy)
+{ return 0; }
+static inline void power_supply_remove_attrs(struct power_supply *psy) {}
+#define power_supply_uevent NULL
+
+#endif /* CONFIG_SYSFS */
+
+#ifdef CONFIG_LEDS_TRIGGERS
+
+extern void power_supply_update_leds(struct power_supply *psy);
+extern int power_supply_create_triggers(struct power_supply *psy);
+extern void power_supply_remove_triggers(struct power_supply *psy);
+
+#else
+
+static inline void power_supply_update_leds(struct power_supply *psy) {}
+static inline int power_supply_create_triggers(struct power_supply *psy)
+{ return 0; }
+static inline void power_supply_remove_triggers(struct power_supply *psy) {}
+
+#endif /* CONFIG_LEDS_TRIGGERS */

kernel/drivers/power/power_supply_core.c

@@ -0,0 +1,215 @@
+/*
+ *  Universal power supply monitor class
+ *
+ *  Copyright © 2007  Anton Vorontsov <cbou@mail.ru>
+ *  Copyright © 2004  Szabolcs Gyurko
+ *  Copyright © 2003  Ian Molton <spyro@f2s.com>
+ *
+ *  Modified: 2004, Oct     Szabolcs Gyurko
+ *
+ *  You may use this code as per GPL version 2
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/power_supply.h>
+#include "power_supply.h"
+
+/* exported for the APM Power driver, APM emulation */
+struct class *power_supply_class;
+EXPORT_SYMBOL_GPL(power_supply_class);
+
+static int __power_supply_changed_work(struct device *dev, void *data)
+{
+	struct power_supply *psy = (struct power_supply *)data;
+	struct power_supply *pst = dev_get_drvdata(dev);
+	int i;
+
+	for (i = 0; i < psy->num_supplicants; i++)
+		if (!strcmp(psy->supplied_to[i], pst->name)) {
+			if (pst->external_power_changed)
+				pst->external_power_changed(pst);
+		}
+	return 0;
+}
+
+static void power_supply_changed_work(struct work_struct *work)
+{
+	struct power_supply *psy = container_of(work, struct power_supply,
+						changed_work);
+
+	dev_dbg(psy->dev, "%s\n", __func__);
+
+	class_for_each_device(power_supply_class, NULL, psy,
+			      __power_supply_changed_work);
+
+	power_supply_update_leds(psy);
+
+	kobject_uevent(&psy->dev->kobj, KOBJ_CHANGE);
+}
+
+void power_supply_changed(struct power_supply *psy)
+{
+	dev_dbg(psy->dev, "%s\n", __func__);
+
+	schedule_work(&psy->changed_work);
+}
+EXPORT_SYMBOL_GPL(power_supply_changed);
+
+static int __power_supply_am_i_supplied(struct device *dev, void *data)
+{
+	union power_supply_propval ret = {0,};
+	struct power_supply *psy = (struct power_supply *)data;
+	struct power_supply *epsy = dev_get_drvdata(dev);
+	int i;
+
+	for (i = 0; i < epsy->num_supplicants; i++) {
+		if (!strcmp(epsy->supplied_to[i], psy->name)) {
+			if (epsy->get_property(epsy,
+				  POWER_SUPPLY_PROP_ONLINE, &ret))
+				continue;
+			if (ret.intval)
+				return ret.intval;
+		}
+	}
+	return 0;
+}
+
+int power_supply_am_i_supplied(struct power_supply *psy)
+{
+	int error;
+
+	error = class_for_each_device(power_supply_class, NULL, psy,
+				      __power_supply_am_i_supplied);
+
+	dev_dbg(psy->dev, "%s %d\n", __func__, error);
+
+	return error;
+}
+EXPORT_SYMBOL_GPL(power_supply_am_i_supplied);
+
+static int __power_supply_is_system_supplied(struct device *dev, void *data)
+{
+	union power_supply_propval ret = {0,};
+	struct power_supply *psy = dev_get_drvdata(dev);
+
+	if (psy->type != POWER_SUPPLY_TYPE_BATTERY) {
+		if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &ret))
+			return 0;
+		if (ret.intval)
+			return ret.intval;
+	}
+	return 0;
+}
+
+int power_supply_is_system_supplied(void)
+{
+	int error;
+
+	error = class_for_each_device(power_supply_class, NULL, NULL,
+				      __power_supply_is_system_supplied);
+
+	return error;
+}
+EXPORT_SYMBOL_GPL(power_supply_is_system_supplied);
+
+int power_supply_set_battery_charged(struct power_supply *psy)
+{
+	if (psy->type == POWER_SUPPLY_TYPE_BATTERY && psy->set_charged) {
+		psy->set_charged(psy);
+		return 0;
+	}
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(power_supply_set_battery_charged);
+
+static int power_supply_match_device_by_name(struct device *dev, void *data)
+{
+	const char *name = data;
+	struct power_supply *psy = dev_get_drvdata(dev);
+
+	return strcmp(psy->name, name) == 0;
+}
+
+struct power_supply *power_supply_get_by_name(char *name)
+{
+	struct device *dev = class_find_device(power_supply_class, NULL, name,
+					power_supply_match_device_by_name);
+
+	return dev ? dev_get_drvdata(dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(power_supply_get_by_name);
+
+int power_supply_register(struct device *parent, struct power_supply *psy)
+{
+	int rc = 0;
+
+	psy->dev = device_create(power_supply_class, parent, 0, psy,
+				 "%s", psy->name);
+	if (IS_ERR(psy->dev)) {
+		rc = PTR_ERR(psy->dev);
+		goto dev_create_failed;
+	}
+
+	INIT_WORK(&psy->changed_work, power_supply_changed_work);
+
+	rc = power_supply_create_attrs(psy);
+	if (rc)
+		goto create_attrs_failed;
+
+	rc = power_supply_create_triggers(psy);
+	if (rc)
+		goto create_triggers_failed;
+
+	power_supply_changed(psy);
+
+	goto success;
+
+create_triggers_failed:
+	power_supply_remove_attrs(psy);
+create_attrs_failed:
+	device_unregister(psy->dev);
+dev_create_failed:
+success:
+	return rc;
+}
+EXPORT_SYMBOL_GPL(power_supply_register);
+
+void power_supply_unregister(struct power_supply *psy)
+{
+	flush_scheduled_work();
+	power_supply_remove_triggers(psy);
+	power_supply_remove_attrs(psy);
+	device_unregister(psy->dev);
+}
+EXPORT_SYMBOL_GPL(power_supply_unregister);
+
+static int __init power_supply_class_init(void)
+{
+	power_supply_class = class_create(THIS_MODULE, "power_supply");
+
+	if (IS_ERR(power_supply_class))
+		return PTR_ERR(power_supply_class);
+
+	power_supply_class->dev_uevent = power_supply_uevent;
+
+	return 0;
+}
+
+static void __exit power_supply_class_exit(void)
+{
+	class_destroy(power_supply_class);
+}
+
+subsys_initcall(power_supply_class_init);
+module_exit(power_supply_class_exit);
+
+MODULE_DESCRIPTION("Universal power supply monitor class");
+MODULE_AUTHOR("Ian Molton <spyro@f2s.com>, "
+	      "Szabolcs Gyurko, "
+	      "Anton Vorontsov <cbou@mail.ru>");
+MODULE_LICENSE("GPL");

kernel/drivers/power/power_supply_leds.c

@@ -0,0 +1,159 @@
+/*
+ *  LEDs triggers for power supply class
+ *
+ *  Copyright © 2007  Anton Vorontsov <cbou@mail.ru>
+ *  Copyright © 2004  Szabolcs Gyurko
+ *  Copyright © 2003  Ian Molton <spyro@f2s.com>
+ *
+ *  Modified: 2004, Oct     Szabolcs Gyurko
+ *
+ *  You may use this code as per GPL version 2
+ */
+
+#include <linux/kernel.h>
+#include <linux/power_supply.h>
+
+#include "power_supply.h"
+
+/* Battery specific LEDs triggers. */
+
+static void power_supply_update_bat_leds(struct power_supply *psy)
+{
+	union power_supply_propval status;
+
+	if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
+		return;
+
+	dev_dbg(psy->dev, "%s %d\n", __func__, status.intval);
+
+	switch (status.intval) {
+	case POWER_SUPPLY_STATUS_FULL:
+		led_trigger_event(psy->charging_full_trig, LED_FULL);
+		led_trigger_event(psy->charging_trig, LED_OFF);
+		led_trigger_event(psy->full_trig, LED_FULL);
+		break;
+	case POWER_SUPPLY_STATUS_CHARGING:
+		led_trigger_event(psy->charging_full_trig, LED_FULL);
+		led_trigger_event(psy->charging_trig, LED_FULL);
+		led_trigger_event(psy->full_trig, LED_OFF);
+		break;
+	default:
+		led_trigger_event(psy->charging_full_trig, LED_OFF);
+		led_trigger_event(psy->charging_trig, LED_OFF);
+		led_trigger_event(psy->full_trig, LED_OFF);
+		break;
+	}
+}
+
+static int power_supply_create_bat_triggers(struct power_supply *psy)
+{
+	int rc = 0;
+
+	psy->charging_full_trig_name = kasprintf(GFP_KERNEL,
+					"%s-charging-or-full", psy->name);
+	if (!psy->charging_full_trig_name)
+		goto charging_full_failed;
+
+	psy->charging_trig_name = kasprintf(GFP_KERNEL,
+					"%s-charging", psy->name);
+	if (!psy->charging_trig_name)
+		goto charging_failed;
+
+	psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->name);
+	if (!psy->full_trig_name)
+		goto full_failed;
+
+	led_trigger_register_simple(psy->charging_full_trig_name,
+				    &psy->charging_full_trig);
+	led_trigger_register_simple(psy->charging_trig_name,
+				    &psy->charging_trig);
+	led_trigger_register_simple(psy->full_trig_name,
+				    &psy->full_trig);
+
+	goto success;
+
+full_failed:
+	kfree(psy->charging_trig_name);
+charging_failed:
+	kfree(psy->charging_full_trig_name);
+charging_full_failed:
+	rc = -ENOMEM;
+success:
+	return rc;
+}
+
+static void power_supply_remove_bat_triggers(struct power_supply *psy)
+{
+	led_trigger_unregister_simple(psy->charging_full_trig);
+	led_trigger_unregister_simple(psy->charging_trig);
+	led_trigger_unregister_simple(psy->full_trig);
+	kfree(psy->full_trig_name);
+	kfree(psy->charging_trig_name);
+	kfree(psy->charging_full_trig_name);
+}
+
+/* Generated power specific LEDs triggers. */
+
+static void power_supply_update_gen_leds(struct power_supply *psy)
+{
+	union power_supply_propval online;
+
+	if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
+		return;
+
+	dev_dbg(psy->dev, "%s %d\n", __func__, online.intval);
+
+	if (online.intval)
+		led_trigger_event(psy->online_trig, LED_FULL);
+	else
+		led_trigger_event(psy->online_trig, LED_OFF);
+}
+
+static int power_supply_create_gen_triggers(struct power_supply *psy)
+{
+	int rc = 0;
+
+	psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online", psy->name);
+	if (!psy->online_trig_name)
+		goto online_failed;
+
+	led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
+
+	goto success;
+
+online_failed:
+	rc = -ENOMEM;
+success:
+	return rc;
+}
+
+static void power_supply_remove_gen_triggers(struct power_supply *psy)
+{
+	led_trigger_unregister_simple(psy->online_trig);
+	kfree(psy->online_trig_name);
+}
+
+/* Choice what triggers to create&update. */
+
+void power_supply_update_leds(struct power_supply *psy)
+{
+	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
+		power_supply_update_bat_leds(psy);
+	else
+		power_supply_update_gen_leds(psy);
+}
+
+int power_supply_create_triggers(struct power_supply *psy)
+{
+	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
+		return power_supply_create_bat_triggers(psy);
+	return power_supply_create_gen_triggers(psy);
+}
+
+void power_supply_remove_triggers(struct power_supply *psy)
+{
+	if (psy->type == POWER_SUPPLY_TYPE_BATTERY)
+		power_supply_remove_bat_triggers(psy);
+	else
+		power_supply_remove_gen_triggers(psy);
+}

kernel/drivers/power/power_supply_sysfs.c

@@ -0,0 +1,303 @@
+/*
+ *  Sysfs interface for the universal power supply monitor class
+ *
+ *  Copyright © 2007  David Woodhouse <dwmw2@infradead.org>
+ *  Copyright © 2007  Anton Vorontsov <cbou@mail.ru>
+ *  Copyright © 2004  Szabolcs Gyurko
+ *  Copyright © 2003  Ian Molton <spyro@f2s.com>
+ *
+ *  Modified: 2004, Oct     Szabolcs Gyurko
+ *
+ *  You may use this code as per GPL version 2
+ */
+
+#include <linux/ctype.h>
+#include <linux/power_supply.h>
+
+#include "power_supply.h"
+
+/*
+ * This is because the name "current" breaks the device attr macro.
+ * The "current" word resolves to "(get_current())" so instead of
+ * "current" "(get_current())" appears in the sysfs.
+ *
+ * The source of this definition is the device.h which calls __ATTR
+ * macro in sysfs.h which calls the __stringify macro.
+ *
+ * Only modification that the name is not tried to be resolved
+ * (as a macro let's say).
+ */
+
+#define POWER_SUPPLY_ATTR(_name)					\
+{									\
+	.attr = { .name = #_name, .mode = 0444 },	\
+	.show = power_supply_show_property,				\
+	.store = NULL,							\
+}
+
+static struct device_attribute power_supply_attrs[];
+
+static ssize_t power_supply_show_property(struct device *dev,
+					  struct device_attribute *attr,
+					  char *buf) {
+	static char *status_text[] = {
+		"Unknown", "Charging", "Discharging", "Not charging", "Full"
+	};
+	static char *charge_type[] = {
+		"Unknown", "N/A", "Trickle", "Fast"
+	};
+	static char *health_text[] = {
+		"Unknown", "Good", "Overheat", "Dead", "Over voltage",
+		"Unspecified failure", "Cold",
+	};
+	static char *technology_text[] = {
+		"Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe", "NiCd",
+		"LiMn"
+	};
+	static char *capacity_level_text[] = {
+		"Unknown", "Critical", "Low", "Normal", "High", "Full"
+	};
+	ssize_t ret;
+	struct power_supply *psy = dev_get_drvdata(dev);
+	const ptrdiff_t off = attr - power_supply_attrs;
+	union power_supply_propval value;
+
+	ret = psy->get_property(psy, off, &value);
+
+	if (ret < 0) {
+		if (ret != -ENODEV)
+			dev_err(dev, "driver failed to report `%s' property\n",
+				attr->attr.name);
+		return ret;
+	}
+
+	if (off == POWER_SUPPLY_PROP_STATUS)
+		return sprintf(buf, "%s\n", status_text[value.intval]);
+	else if (off == POWER_SUPPLY_PROP_CHARGE_TYPE)
+		return sprintf(buf, "%s\n", charge_type[value.intval]);
+	else if (off == POWER_SUPPLY_PROP_HEALTH)
+		return sprintf(buf, "%s\n", health_text[value.intval]);
+	else if (off == POWER_SUPPLY_PROP_TECHNOLOGY)
+		return sprintf(buf, "%s\n", technology_text[value.intval]);
+	else if (off == POWER_SUPPLY_PROP_CAPACITY_LEVEL)
+		return sprintf(buf, "%s\n", capacity_level_text[value.intval]);
+	else if (off >= POWER_SUPPLY_PROP_MODEL_NAME)
+		return sprintf(buf, "%s\n", value.strval);
+
+	return sprintf(buf, "%d\n", value.intval);
+}
+
+/* Must be in the same order as POWER_SUPPLY_PROP_* */
+static struct device_attribute power_supply_attrs[] = {
+	/* Properties of type `int' */
+	POWER_SUPPLY_ATTR(status),
+	POWER_SUPPLY_ATTR(charge_type),
+	POWER_SUPPLY_ATTR(health),
+	POWER_SUPPLY_ATTR(present),
+	POWER_SUPPLY_ATTR(online),
+	POWER_SUPPLY_ATTR(technology),
+	POWER_SUPPLY_ATTR(voltage_max),
+	POWER_SUPPLY_ATTR(voltage_min),
+	POWER_SUPPLY_ATTR(voltage_max_design),
+	POWER_SUPPLY_ATTR(voltage_min_design),
+	POWER_SUPPLY_ATTR(voltage_now),
+	POWER_SUPPLY_ATTR(voltage_avg),
+	POWER_SUPPLY_ATTR(current_now),
+	POWER_SUPPLY_ATTR(current_avg),
+	POWER_SUPPLY_ATTR(power_now),
+	POWER_SUPPLY_ATTR(power_avg),
+	POWER_SUPPLY_ATTR(charge_full_design),
+	POWER_SUPPLY_ATTR(charge_empty_design),
+	POWER_SUPPLY_ATTR(charge_full),
+	POWER_SUPPLY_ATTR(charge_empty),
+	POWER_SUPPLY_ATTR(charge_now),
+	POWER_SUPPLY_ATTR(charge_avg),
+	POWER_SUPPLY_ATTR(charge_counter),
+	POWER_SUPPLY_ATTR(energy_full_design),
+	POWER_SUPPLY_ATTR(energy_empty_design),
+	POWER_SUPPLY_ATTR(energy_full),
+	POWER_SUPPLY_ATTR(energy_empty),
+	POWER_SUPPLY_ATTR(energy_now),
+	POWER_SUPPLY_ATTR(energy_avg),
+	POWER_SUPPLY_ATTR(capacity),
+	POWER_SUPPLY_ATTR(capacity_level),
+	POWER_SUPPLY_ATTR(temp),
+	POWER_SUPPLY_ATTR(temp_ambient),
+	POWER_SUPPLY_ATTR(time_to_empty_now),
+	POWER_SUPPLY_ATTR(time_to_empty_avg),
+	POWER_SUPPLY_ATTR(time_to_full_now),
+	POWER_SUPPLY_ATTR(time_to_full_avg),
+	/* Properties of type `const char *' */
+	POWER_SUPPLY_ATTR(model_name),
+	POWER_SUPPLY_ATTR(manufacturer),
+	POWER_SUPPLY_ATTR(serial_number),
+};
+
+static ssize_t power_supply_show_static_attrs(struct device *dev,
+					      struct device_attribute *attr,
+					      char *buf) {
+	static char *type_text[] = { "Battery", "UPS", "Mains", "USB" };
+	struct power_supply *psy = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%s\n", type_text[psy->type]);
+}
+
+static struct device_attribute power_supply_static_attrs[] = {
+	__ATTR(type, 0444, power_supply_show_static_attrs, NULL),
+};
+
+int power_supply_create_attrs(struct power_supply *psy)
+{
+	int rc = 0;
+	int i, j;
+
+	for (i = 0; i < ARRAY_SIZE(power_supply_static_attrs); i++) {
+		rc = device_create_file(psy->dev,
+			    &power_supply_static_attrs[i]);
+		if (rc)
+			goto statics_failed;
+	}
+
+	for (j = 0; j < psy->num_properties; j++) {
+		rc = device_create_file(psy->dev,
+			    &power_supply_attrs[psy->properties[j]]);
+		if (rc)
+			goto dynamics_failed;
+	}
+
+	goto succeed;
+
+dynamics_failed:
+	while (j--)
+		device_remove_file(psy->dev,
+			   &power_supply_attrs[psy->properties[j]]);
+statics_failed:
+	while (i--)
+		device_remove_file(psy->dev, &power_supply_static_attrs[i]);
+succeed:
+	return rc;
+}
+
+void power_supply_remove_attrs(struct power_supply *psy)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(power_supply_static_attrs); i++)
+		device_remove_file(psy->dev, &power_supply_static_attrs[i]);
+
+	for (i = 0; i < psy->num_properties; i++)
+		device_remove_file(psy->dev,
+			    &power_supply_attrs[psy->properties[i]]);
+}
+
+static char *kstruprdup(const char *str, gfp_t gfp)
+{
+	char *ret, *ustr;
+
+	ustr = ret = kmalloc(strlen(str) + 1, gfp);
+
+	if (!ret)
+		return NULL;
+
+	while (*str)
+		*ustr++ = toupper(*str++);
+
+	*ustr = 0;
+
+	return ret;
+}
+
+int power_supply_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct power_supply *psy = dev_get_drvdata(dev);
+	int ret = 0, j;
+	char *prop_buf;
+	char *attrname;
+
+	dev_dbg(dev, "uevent\n");
+
+	if (!psy || !psy->dev) {
+		dev_dbg(dev, "No power supply yet\n");
+		return ret;
+	}
+
+	dev_dbg(dev, "POWER_SUPPLY_NAME=%s\n", psy->name);
+
+	ret = add_uevent_var(env, "POWER_SUPPLY_NAME=%s", psy->name);
+	if (ret)
+		return ret;
+
+	prop_buf = (char *)get_zeroed_page(GFP_KERNEL);
+	if (!prop_buf)
+		return -ENOMEM;
+
+	for (j = 0; j < ARRAY_SIZE(power_supply_static_attrs); j++) {
+		struct device_attribute *attr;
+		char *line;
+
+		attr = &power_supply_static_attrs[j];
+
+		ret = power_supply_show_static_attrs(dev, attr, prop_buf);
+		if (ret < 0)
+			goto out;
+
+		line = strchr(prop_buf, '\n');
+		if (line)
+			*line = 0;
+
+		attrname = kstruprdup(attr->attr.name, GFP_KERNEL);
+		if (!attrname) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
+		dev_dbg(dev, "Static prop %s=%s\n", attrname, prop_buf);
+
+		ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf);
+		kfree(attrname);
+		if (ret)
+			goto out;
+	}
+
+	dev_dbg(dev, "%zd dynamic props\n", psy->num_properties);
+
+	for (j = 0; j < psy->num_properties; j++) {
+		struct device_attribute *attr;
+		char *line;
+
+		attr = &power_supply_attrs[psy->properties[j]];
+
+		ret = power_supply_show_property(dev, attr, prop_buf);
+		if (ret == -ENODEV) {
+			/* When a battery is absent, we expect -ENODEV. Don't abort;
+			   send the uevent with at least the the PRESENT=0 property */
+			ret = 0;
+			continue;
+		}
+
+		if (ret < 0)
+			goto out;
+
+		line = strchr(prop_buf, '\n');
+		if (line)
+			*line = 0;
+
+		attrname = kstruprdup(attr->attr.name, GFP_KERNEL);
+		if (!attrname) {
+			ret = -ENOMEM;
+			goto out;
+		}
+
+		dev_dbg(dev, "prop %s=%s\n", attrname, prop_buf);
+
+		ret = add_uevent_var(env, "POWER_SUPPLY_%s=%s", attrname, prop_buf);
+		kfree(attrname);
+		if (ret)
+			goto out;
+	}
+
+out:
+	free_page((unsigned long)prop_buf);
+
+	return ret;
+}

kernel/drivers/power/tosa_battery.c

@@ -0,0 +1,486 @@
+/*
+ * Battery and Power Management code for the Sharp SL-6000x
+ *
+ * Copyright (c) 2005 Dirk Opfer
+ * Copyright (c) 2008 Dmitry Baryshkov
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/power_supply.h>
+#include <linux/wm97xx.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+
+#include <asm/mach-types.h>
+#include <mach/tosa.h>
+
+static DEFINE_MUTEX(bat_lock); /* protects gpio pins */
+static struct work_struct bat_work;
+
+struct tosa_bat {
+	int status;
+	struct power_supply psy;
+	int full_chrg;
+
+	struct mutex work_lock; /* protects data */
+
+	bool (*is_present)(struct tosa_bat *bat);
+	int gpio_full;
+	int gpio_charge_off;
+
+	int technology;
+
+	int gpio_bat;
+	int adc_bat;
+	int adc_bat_divider;
+	int bat_max;
+	int bat_min;
+
+	int gpio_temp;
+	int adc_temp;
+	int adc_temp_divider;
+};
+
+static struct tosa_bat tosa_bat_main;
+static struct tosa_bat tosa_bat_jacket;
+
+static unsigned long tosa_read_bat(struct tosa_bat *bat)
+{
+	unsigned long value = 0;
+
+	if (bat->gpio_bat < 0 || bat->adc_bat < 0)
+		return 0;
+
+	mutex_lock(&bat_lock);
+	gpio_set_value(bat->gpio_bat, 1);
+	msleep(5);
+	value = wm97xx_read_aux_adc(bat->psy.dev->parent->driver_data,
+			bat->adc_bat);
+	gpio_set_value(bat->gpio_bat, 0);
+	mutex_unlock(&bat_lock);
+
+	value = value * 1000000 / bat->adc_bat_divider;
+
+	return value;
+}
+
+static unsigned long tosa_read_temp(struct tosa_bat *bat)
+{
+	unsigned long value = 0;
+
+	if (bat->gpio_temp < 0 || bat->adc_temp < 0)
+		return 0;
+
+	mutex_lock(&bat_lock);
+	gpio_set_value(bat->gpio_temp, 1);
+	msleep(5);
+	value = wm97xx_read_aux_adc(bat->psy.dev->parent->driver_data,
+			bat->adc_temp);
+	gpio_set_value(bat->gpio_temp, 0);
+	mutex_unlock(&bat_lock);
+
+	value = value * 10000 / bat->adc_temp_divider;
+
+	return value;
+}
+
+static int tosa_bat_get_property(struct power_supply *psy,
+			    enum power_supply_property psp,
+			    union power_supply_propval *val)
+{
+	int ret = 0;
+	struct tosa_bat *bat = container_of(psy, struct tosa_bat, psy);
+
+	if (bat->is_present && !bat->is_present(bat)
+			&& psp != POWER_SUPPLY_PROP_PRESENT) {
+		return -ENODEV;
+	}
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		val->intval = bat->status;
+		break;
+	case POWER_SUPPLY_PROP_TECHNOLOGY:
+		val->intval = bat->technology;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		val->intval = tosa_read_bat(bat);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+		if (bat->full_chrg == -1)
+			val->intval = bat->bat_max;
+		else
+			val->intval = bat->full_chrg;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+		val->intval = bat->bat_max;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+		val->intval = bat->bat_min;
+		break;
+	case POWER_SUPPLY_PROP_TEMP:
+		val->intval = tosa_read_temp(bat);
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = bat->is_present ? bat->is_present(bat) : 1;
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static bool tosa_jacket_bat_is_present(struct tosa_bat *bat)
+{
+	return gpio_get_value(TOSA_GPIO_JACKET_DETECT) == 0;
+}
+
+static void tosa_bat_external_power_changed(struct power_supply *psy)
+{
+	schedule_work(&bat_work);
+}
+
+static irqreturn_t tosa_bat_gpio_isr(int irq, void *data)
+{
+	pr_info("tosa_bat_gpio irq: %d\n", gpio_get_value(irq_to_gpio(irq)));
+	schedule_work(&bat_work);
+	return IRQ_HANDLED;
+}
+
+static void tosa_bat_update(struct tosa_bat *bat)
+{
+	int old;
+	struct power_supply *psy = &bat->psy;
+
+	mutex_lock(&bat->work_lock);
+
+	old = bat->status;
+
+	if (bat->is_present && !bat->is_present(bat)) {
+		printk(KERN_NOTICE "%s not present\n", psy->name);
+		bat->status = POWER_SUPPLY_STATUS_UNKNOWN;
+		bat->full_chrg = -1;
+	} else if (power_supply_am_i_supplied(psy)) {
+		if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) {
+			gpio_set_value(bat->gpio_charge_off, 0);
+			mdelay(15);
+		}
+
+		if (gpio_get_value(bat->gpio_full)) {
+			if (old == POWER_SUPPLY_STATUS_CHARGING ||
+					bat->full_chrg == -1)
+				bat->full_chrg = tosa_read_bat(bat);
+
+			gpio_set_value(bat->gpio_charge_off, 1);
+			bat->status = POWER_SUPPLY_STATUS_FULL;
+		} else {
+			gpio_set_value(bat->gpio_charge_off, 0);
+			bat->status = POWER_SUPPLY_STATUS_CHARGING;
+		}
+	} else {
+		gpio_set_value(bat->gpio_charge_off, 1);
+		bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
+	}
+
+	if (old != bat->status)
+		power_supply_changed(psy);
+
+	mutex_unlock(&bat->work_lock);
+}
+
+static void tosa_bat_work(struct work_struct *work)
+{
+	tosa_bat_update(&tosa_bat_main);
+	tosa_bat_update(&tosa_bat_jacket);
+}
+
+
+static enum power_supply_property tosa_bat_main_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_VOLTAGE_MAX,
+	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_PRESENT,
+};
+
+static enum power_supply_property tosa_bat_bu_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_TECHNOLOGY,
+	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+	POWER_SUPPLY_PROP_PRESENT,
+};
+
+static struct tosa_bat tosa_bat_main = {
+	.status = POWER_SUPPLY_STATUS_DISCHARGING,
+	.full_chrg = -1,
+	.psy = {
+		.name		= "main-battery",
+		.type		= POWER_SUPPLY_TYPE_BATTERY,
+		.properties	= tosa_bat_main_props,
+		.num_properties	= ARRAY_SIZE(tosa_bat_main_props),
+		.get_property	= tosa_bat_get_property,
+		.external_power_changed = tosa_bat_external_power_changed,
+		.use_for_apm	= 1,
+	},
+
+	.gpio_full = TOSA_GPIO_BAT0_CRG,
+	.gpio_charge_off = TOSA_GPIO_CHARGE_OFF,
+
+	.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
+
+	.gpio_bat = TOSA_GPIO_BAT0_V_ON,
+	.adc_bat = WM97XX_AUX_ID3,
+	.adc_bat_divider = 414,
+	.bat_max = 4310000,
+	.bat_min = 1551 * 1000000 / 414,
+
+	.gpio_temp = TOSA_GPIO_BAT1_TH_ON,
+	.adc_temp = WM97XX_AUX_ID2,
+	.adc_temp_divider = 10000,
+};
+
+static struct tosa_bat tosa_bat_jacket = {
+	.status = POWER_SUPPLY_STATUS_DISCHARGING,
+	.full_chrg = -1,
+	.psy = {
+		.name		= "jacket-battery",
+		.type		= POWER_SUPPLY_TYPE_BATTERY,
+		.properties	= tosa_bat_main_props,
+		.num_properties	= ARRAY_SIZE(tosa_bat_main_props),
+		.get_property	= tosa_bat_get_property,
+		.external_power_changed = tosa_bat_external_power_changed,
+	},
+
+	.is_present = tosa_jacket_bat_is_present,
+	.gpio_full = TOSA_GPIO_BAT1_CRG,
+	.gpio_charge_off = TOSA_GPIO_CHARGE_OFF_JC,
+
+	.technology = POWER_SUPPLY_TECHNOLOGY_LIPO,
+
+	.gpio_bat = TOSA_GPIO_BAT1_V_ON,
+	.adc_bat = WM97XX_AUX_ID3,
+	.adc_bat_divider = 414,
+	.bat_max = 4310000,
+	.bat_min = 1551 * 1000000 / 414,
+
+	.gpio_temp = TOSA_GPIO_BAT0_TH_ON,
+	.adc_temp = WM97XX_AUX_ID2,
+	.adc_temp_divider = 10000,
+};
+
+static struct tosa_bat tosa_bat_bu = {
+	.status = POWER_SUPPLY_STATUS_UNKNOWN,
+	.full_chrg = -1,
+
+	.psy = {
+		.name		= "backup-battery",
+		.type		= POWER_SUPPLY_TYPE_BATTERY,
+		.properties	= tosa_bat_bu_props,
+		.num_properties	= ARRAY_SIZE(tosa_bat_bu_props),
+		.get_property	= tosa_bat_get_property,
+		.external_power_changed = tosa_bat_external_power_changed,
+	},
+
+	.gpio_full = -1,
+	.gpio_charge_off = -1,
+
+	.technology = POWER_SUPPLY_TECHNOLOGY_LiMn,
+
+	.gpio_bat = TOSA_GPIO_BU_CHRG_ON,
+	.adc_bat = WM97XX_AUX_ID4,
+	.adc_bat_divider = 1266,
+
+	.gpio_temp = -1,
+	.adc_temp = -1,
+	.adc_temp_divider = -1,
+};
+
+static struct {
+	int gpio;
+	char *name;
+	bool output;
+	int value;
+} gpios[] = {
+	{ TOSA_GPIO_CHARGE_OFF,		"main charge off",	1, 1 },
+	{ TOSA_GPIO_CHARGE_OFF_JC,	"jacket charge off",	1, 1 },
+	{ TOSA_GPIO_BAT_SW_ON,		"battery switch",	1, 0 },
+	{ TOSA_GPIO_BAT0_V_ON,		"main battery",		1, 0 },
+	{ TOSA_GPIO_BAT1_V_ON,		"jacket battery",	1, 0 },
+	{ TOSA_GPIO_BAT1_TH_ON,		"main battery temp",	1, 0 },
+	{ TOSA_GPIO_BAT0_TH_ON,		"jacket battery temp",	1, 0 },
+	{ TOSA_GPIO_BU_CHRG_ON,		"backup battery",	1, 0 },
+	{ TOSA_GPIO_BAT0_CRG,		"main battery full",	0, 0 },
+	{ TOSA_GPIO_BAT1_CRG,		"jacket battery full",	0, 0 },
+	{ TOSA_GPIO_BAT0_LOW,		"main battery low",	0, 0 },
+	{ TOSA_GPIO_BAT1_LOW,		"jacket battery low",	0, 0 },
+	{ TOSA_GPIO_JACKET_DETECT,	"jacket detect",	0, 0 },
+};
+
+#ifdef CONFIG_PM
+static int tosa_bat_suspend(struct platform_device *dev, pm_message_t state)
+{
+	/* flush all pending status updates */
+	flush_scheduled_work();
+	return 0;
+}
+
+static int tosa_bat_resume(struct platform_device *dev)
+{
+	/* things may have changed while we were away */
+	schedule_work(&bat_work);
+	return 0;
+}
+#else
+#define tosa_bat_suspend NULL
+#define tosa_bat_resume NULL
+#endif
+
+static int __devinit tosa_bat_probe(struct platform_device *dev)
+{
+	int ret;
+	int i;
+
+	if (!machine_is_tosa())
+		return -ENODEV;
+
+	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
+		ret = gpio_request(gpios[i].gpio, gpios[i].name);
+		if (ret) {
+			i--;
+			goto err_gpio;
+		}
+
+		if (gpios[i].output)
+			ret = gpio_direction_output(gpios[i].gpio,
+					gpios[i].value);
+		else
+			ret = gpio_direction_input(gpios[i].gpio);
+
+		if (ret)
+			goto err_gpio;
+	}
+
+	mutex_init(&tosa_bat_main.work_lock);
+	mutex_init(&tosa_bat_jacket.work_lock);
+
+	INIT_WORK(&bat_work, tosa_bat_work);
+
+	ret = power_supply_register(&dev->dev, &tosa_bat_main.psy);
+	if (ret)
+		goto err_psy_reg_main;
+	ret = power_supply_register(&dev->dev, &tosa_bat_jacket.psy);
+	if (ret)
+		goto err_psy_reg_jacket;
+	ret = power_supply_register(&dev->dev, &tosa_bat_bu.psy);
+	if (ret)
+		goto err_psy_reg_bu;
+
+	ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG),
+				tosa_bat_gpio_isr,
+				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+				"main full", &tosa_bat_main);
+	if (ret)
+		goto err_req_main;
+
+	ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG),
+				tosa_bat_gpio_isr,
+				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+				"jacket full", &tosa_bat_jacket);
+	if (ret)
+		goto err_req_jacket;
+
+	ret = request_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT),
+				tosa_bat_gpio_isr,
+				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+				"jacket detect", &tosa_bat_jacket);
+	if (!ret) {
+		schedule_work(&bat_work);
+		return 0;
+	}
+
+	free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket);
+err_req_jacket:
+	free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);
+err_req_main:
+	power_supply_unregister(&tosa_bat_bu.psy);
+err_psy_reg_bu:
+	power_supply_unregister(&tosa_bat_jacket.psy);
+err_psy_reg_jacket:
+	power_supply_unregister(&tosa_bat_main.psy);
+err_psy_reg_main:
+
+	/* see comment in tosa_bat_remove */
+	flush_scheduled_work();
+
+	i--;
+err_gpio:
+	for (; i >= 0; i--)
+		gpio_free(gpios[i].gpio);
+
+	return ret;
+}
+
+static int __devexit tosa_bat_remove(struct platform_device *dev)
+{
+	int i;
+
+	free_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), &tosa_bat_jacket);
+	free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket);
+	free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main);
+
+	power_supply_unregister(&tosa_bat_bu.psy);
+	power_supply_unregister(&tosa_bat_jacket.psy);
+	power_supply_unregister(&tosa_bat_main.psy);
+
+	/*
+	 * now flush all pending work.
+	 * we won't get any more schedules, since all
+	 * sources (isr and external_power_changed)
+	 * are unregistered now.
+	 */
+	flush_scheduled_work();
+
+	for (i = ARRAY_SIZE(gpios) - 1; i >= 0; i--)
+		gpio_free(gpios[i].gpio);
+
+	return 0;
+}
+
+static struct platform_driver tosa_bat_driver = {
+	.driver.name	= "wm97xx-battery",
+	.driver.owner	= THIS_MODULE,
+	.probe		= tosa_bat_probe,
+	.remove		= __devexit_p(tosa_bat_remove),
+	.suspend	= tosa_bat_suspend,
+	.resume		= tosa_bat_resume,
+};
+
+static int __init tosa_bat_init(void)
+{
+	return platform_driver_register(&tosa_bat_driver);
+}
+
+static void __exit tosa_bat_exit(void)
+{
+	platform_driver_unregister(&tosa_bat_driver);
+}
+
+module_init(tosa_bat_init);
+module_exit(tosa_bat_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Dmitry Baryshkov");
+MODULE_DESCRIPTION("Tosa battery driver");
+MODULE_ALIAS("platform:wm97xx-battery");

kernel/drivers/power/wm831x_power.c

@@ -0,0 +1,779 @@
+/*
+ * PMU driver for Wolfson Microelectronics wm831x PMICs
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+#include <linux/mfd/wm831x/core.h>
+#include <linux/mfd/wm831x/auxadc.h>
+#include <linux/mfd/wm831x/pmu.h>
+#include <linux/mfd/wm831x/pdata.h>
+
+struct wm831x_power {
+	struct wm831x *wm831x;
+	struct power_supply wall;
+	struct power_supply backup;
+	struct power_supply usb;
+	struct power_supply battery;
+};
+
+static int wm831x_power_check_online(struct wm831x *wm831x, int supply,
+				     union power_supply_propval *val)
+{
+	int ret;
+
+	ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
+	if (ret < 0)
+		return ret;
+
+	if (ret & supply)
+		val->intval = 1;
+	else
+		val->intval = 0;
+
+	return 0;
+}
+
+static int wm831x_power_read_voltage(struct wm831x *wm831x,
+				     enum wm831x_auxadc src,
+				     union power_supply_propval *val)
+{
+	int ret;
+
+	ret = wm831x_auxadc_read_uv(wm831x, src);
+	if (ret >= 0)
+		val->intval = ret;
+
+	return ret;
+}
+
+/*********************************************************************
+ *		WALL Power
+ *********************************************************************/
+static int wm831x_wall_get_prop(struct power_supply *psy,
+				enum power_supply_property psp,
+				union power_supply_propval *val)
+{
+	struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
+	struct wm831x *wm831x = wm831x_power->wm831x;
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = wm831x_power_check_online(wm831x, WM831X_PWR_WALL, val);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_WALL, val);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static enum power_supply_property wm831x_wall_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+};
+
+/*********************************************************************
+ *		USB Power
+ *********************************************************************/
+static int wm831x_usb_get_prop(struct power_supply *psy,
+			       enum power_supply_property psp,
+			       union power_supply_propval *val)
+{
+	struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
+	struct wm831x *wm831x = wm831x_power->wm831x;
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = wm831x_power_check_online(wm831x, WM831X_PWR_USB, val);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_USB, val);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static enum power_supply_property wm831x_usb_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+};
+
+/*********************************************************************
+ *		Battery properties
+ *********************************************************************/
+
+struct chg_map {
+	int val;
+	int reg_val;
+};
+
+static struct chg_map trickle_ilims[] = {
+	{  50, 0 << WM831X_CHG_TRKL_ILIM_SHIFT },
+	{ 100, 1 << WM831X_CHG_TRKL_ILIM_SHIFT },
+	{ 150, 2 << WM831X_CHG_TRKL_ILIM_SHIFT },
+	{ 200, 3 << WM831X_CHG_TRKL_ILIM_SHIFT },
+};
+
+static struct chg_map vsels[] = {
+	{ 4050, 0 << WM831X_CHG_VSEL_SHIFT },
+	{ 4100, 1 << WM831X_CHG_VSEL_SHIFT },
+	{ 4150, 2 << WM831X_CHG_VSEL_SHIFT },
+	{ 4200, 3 << WM831X_CHG_VSEL_SHIFT },
+};
+
+static struct chg_map fast_ilims[] = {
+	{    0,  0 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{   50,  1 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  100,  2 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  150,  3 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  200,  4 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  250,  5 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  300,  6 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  350,  7 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  400,  8 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  450,  9 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  500, 10 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  600, 11 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  700, 12 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  800, 13 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{  900, 14 << WM831X_CHG_FAST_ILIM_SHIFT },
+	{ 1000, 15 << WM831X_CHG_FAST_ILIM_SHIFT },
+};
+
+static struct chg_map eoc_iterms[] = {
+	{ 20, 0 << WM831X_CHG_ITERM_SHIFT },
+	{ 30, 1 << WM831X_CHG_ITERM_SHIFT },
+	{ 40, 2 << WM831X_CHG_ITERM_SHIFT },
+	{ 50, 3 << WM831X_CHG_ITERM_SHIFT },
+	{ 60, 4 << WM831X_CHG_ITERM_SHIFT },
+	{ 70, 5 << WM831X_CHG_ITERM_SHIFT },
+	{ 80, 6 << WM831X_CHG_ITERM_SHIFT },
+	{ 90, 7 << WM831X_CHG_ITERM_SHIFT },
+};
+
+static struct chg_map chg_times[] = {
+	{  60,  0 << WM831X_CHG_TIME_SHIFT },
+	{  90,  1 << WM831X_CHG_TIME_SHIFT },
+	{ 120,  2 << WM831X_CHG_TIME_SHIFT },
+	{ 150,  3 << WM831X_CHG_TIME_SHIFT },
+	{ 180,  4 << WM831X_CHG_TIME_SHIFT },
+	{ 210,  5 << WM831X_CHG_TIME_SHIFT },
+	{ 240,  6 << WM831X_CHG_TIME_SHIFT },
+	{ 270,  7 << WM831X_CHG_TIME_SHIFT },
+	{ 300,  8 << WM831X_CHG_TIME_SHIFT },
+	{ 330,  9 << WM831X_CHG_TIME_SHIFT },
+	{ 360, 10 << WM831X_CHG_TIME_SHIFT },
+	{ 390, 11 << WM831X_CHG_TIME_SHIFT },
+	{ 420, 12 << WM831X_CHG_TIME_SHIFT },
+	{ 450, 13 << WM831X_CHG_TIME_SHIFT },
+	{ 480, 14 << WM831X_CHG_TIME_SHIFT },
+	{ 510, 15 << WM831X_CHG_TIME_SHIFT },
+};
+
+static void wm831x_battey_apply_config(struct wm831x *wm831x,
+				       struct chg_map *map, int count, int val,
+				       int *reg, const char *name,
+				       const char *units)
+{
+	int i;
+
+	for (i = 0; i < count; i++)
+		if (val == map[i].val)
+			break;
+	if (i == count) {
+		dev_err(wm831x->dev, "Invalid %s %d%s\n",
+			name, val, units);
+	} else {
+		*reg |= map[i].reg_val;
+		dev_dbg(wm831x->dev, "Set %s of %d%s\n", name, val, units);
+	}
+}
+
+static void wm831x_config_battery(struct wm831x *wm831x)
+{
+	struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
+	struct wm831x_battery_pdata *pdata;
+	int ret, reg1, reg2;
+
+	if (!wm831x_pdata || !wm831x_pdata->battery) {
+		dev_warn(wm831x->dev,
+			 "No battery charger configuration\n");
+		return;
+	}
+
+	pdata = wm831x_pdata->battery;
+
+	reg1 = 0;
+	reg2 = 0;
+
+	if (!pdata->enable) {
+		dev_info(wm831x->dev, "Battery charger disabled\n");
+		return;
+	}
+
+	reg1 |= WM831X_CHG_ENA;
+	if (pdata->off_mask)
+		reg2 |= WM831X_CHG_OFF_MSK;
+	if (pdata->fast_enable)
+		reg1 |= WM831X_CHG_FAST;
+
+	wm831x_battey_apply_config(wm831x, trickle_ilims,
+				   ARRAY_SIZE(trickle_ilims),
+				   pdata->trickle_ilim, &reg2,
+				   "trickle charge current limit", "mA");
+
+	wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels),
+				   pdata->vsel, &reg2,
+				   "target voltage", "mV");
+
+	wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims),
+				   pdata->fast_ilim, &reg2,
+				   "fast charge current limit", "mA");
+
+	wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms),
+				   pdata->eoc_iterm, &reg1,
+				   "end of charge current threshold", "mA");
+
+	wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times),
+				   pdata->timeout, &reg2,
+				   "charger timeout", "min");
+
+	ret = wm831x_reg_unlock(wm831x);
+	if (ret != 0) {
+		dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
+		return;
+	}
+
+	ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_1,
+			      WM831X_CHG_ENA_MASK |
+			      WM831X_CHG_FAST_MASK |
+			      WM831X_CHG_ITERM_MASK |
+			      WM831X_CHG_ITERM_MASK,
+			      reg1);
+	if (ret != 0)
+		dev_err(wm831x->dev, "Failed to set charger control 1: %d\n",
+			ret);
+
+	ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_2,
+			      WM831X_CHG_OFF_MSK |
+			      WM831X_CHG_TIME_MASK |
+			      WM831X_CHG_FAST_ILIM_MASK |
+			      WM831X_CHG_TRKL_ILIM_MASK |
+			      WM831X_CHG_VSEL_MASK,
+			      reg2);
+	if (ret != 0)
+		dev_err(wm831x->dev, "Failed to set charger control 2: %d\n",
+			ret);
+
+	wm831x_reg_lock(wm831x);
+}
+
+static int wm831x_bat_check_status(struct wm831x *wm831x, int *status)
+{
+	int ret;
+
+	ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS);
+	if (ret < 0)
+		return ret;
+
+	if (ret & WM831X_PWR_SRC_BATT) {
+		*status = POWER_SUPPLY_STATUS_DISCHARGING;
+		return 0;
+	}
+
+	ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
+	if (ret < 0)
+		return ret;
+
+	switch (ret & WM831X_CHG_STATE_MASK) {
+	case WM831X_CHG_STATE_OFF:
+		*status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		break;
+	case WM831X_CHG_STATE_TRICKLE:
+	case WM831X_CHG_STATE_FAST:
+		*status = POWER_SUPPLY_STATUS_CHARGING;
+		break;
+
+	default:
+		*status = POWER_SUPPLY_STATUS_UNKNOWN;
+		break;
+	}
+
+	return 0;
+}
+
+static int wm831x_bat_check_type(struct wm831x *wm831x, int *type)
+{
+	int ret;
+
+	ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
+	if (ret < 0)
+		return ret;
+
+	switch (ret & WM831X_CHG_STATE_MASK) {
+	case WM831X_CHG_STATE_TRICKLE:
+	case WM831X_CHG_STATE_TRICKLE_OT:
+		*type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+		break;
+	case WM831X_CHG_STATE_FAST:
+	case WM831X_CHG_STATE_FAST_OT:
+		*type = POWER_SUPPLY_CHARGE_TYPE_FAST;
+		break;
+	default:
+		*type = POWER_SUPPLY_CHARGE_TYPE_NONE;
+		break;
+	}
+
+	return 0;
+}
+
+static int wm831x_bat_check_health(struct wm831x *wm831x, int *health)
+{
+	int ret;
+
+	ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS);
+	if (ret < 0)
+		return ret;
+
+	if (ret & WM831X_BATT_HOT_STS) {
+		*health = POWER_SUPPLY_HEALTH_OVERHEAT;
+		return 0;
+	}
+
+	if (ret & WM831X_BATT_COLD_STS) {
+		*health = POWER_SUPPLY_HEALTH_COLD;
+		return 0;
+	}
+
+	if (ret & WM831X_BATT_OV_STS) {
+		*health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+		return 0;
+	}
+
+	switch (ret & WM831X_CHG_STATE_MASK) {
+	case WM831X_CHG_STATE_TRICKLE_OT:
+	case WM831X_CHG_STATE_FAST_OT:
+		*health = POWER_SUPPLY_HEALTH_OVERHEAT;
+		break;
+	case WM831X_CHG_STATE_DEFECTIVE:
+		*health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+		break;
+	default:
+		*health = POWER_SUPPLY_HEALTH_GOOD;
+		break;
+	}
+
+	return 0;
+}
+
+static int wm831x_bat_get_prop(struct power_supply *psy,
+			       enum power_supply_property psp,
+			       union power_supply_propval *val)
+{
+	struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
+	struct wm831x *wm831x = wm831x_power->wm831x;
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		ret = wm831x_bat_check_status(wm831x, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_ONLINE:
+		ret = wm831x_power_check_online(wm831x, WM831X_PWR_SRC_BATT,
+						val);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val);
+		break;
+	case POWER_SUPPLY_PROP_HEALTH:
+		ret = wm831x_bat_check_health(wm831x, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		ret = wm831x_bat_check_type(wm831x, &val->intval);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static enum power_supply_property wm831x_bat_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+};
+
+static const char *wm831x_bat_irqs[] = {
+	"BATT HOT",
+	"BATT COLD",
+	"BATT FAIL",
+	"OV",
+	"END",
+	"TO",
+	"MODE",
+	"START",
+};
+
+static irqreturn_t wm831x_bat_irq(int irq, void *data)
+{
+	struct wm831x_power *wm831x_power = data;
+	struct wm831x *wm831x = wm831x_power->wm831x;
+
+	dev_dbg(wm831x->dev, "Battery status changed: %d\n", irq);
+
+	/* The battery charger is autonomous so we don't need to do
+	 * anything except kick user space */
+	power_supply_changed(&wm831x_power->battery);
+
+	return IRQ_HANDLED;
+}
+
+
+/*********************************************************************
+ *		Backup supply properties
+ *********************************************************************/
+
+static void wm831x_config_backup(struct wm831x *wm831x)
+{
+	struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
+	struct wm831x_backup_pdata *pdata;
+	int ret, reg;
+
+	if (!wm831x_pdata || !wm831x_pdata->backup) {
+		dev_warn(wm831x->dev,
+			 "No backup battery charger configuration\n");
+		return;
+	}
+
+	pdata = wm831x_pdata->backup;
+
+	reg = 0;
+
+	if (pdata->charger_enable)
+		reg |= WM831X_BKUP_CHG_ENA | WM831X_BKUP_BATT_DET_ENA;
+	if (pdata->no_constant_voltage)
+		reg |= WM831X_BKUP_CHG_MODE;
+
+	switch (pdata->vlim) {
+	case 2500:
+		break;
+	case 3100:
+		reg |= WM831X_BKUP_CHG_VLIM;
+		break;
+	default:
+		dev_err(wm831x->dev, "Invalid backup voltage limit %dmV\n",
+			pdata->vlim);
+	}
+
+	switch (pdata->ilim) {
+	case 100:
+		break;
+	case 200:
+		reg |= 1;
+		break;
+	case 300:
+		reg |= 2;
+		break;
+	case 400:
+		reg |= 3;
+		break;
+	default:
+		dev_err(wm831x->dev, "Invalid backup current limit %duA\n",
+			pdata->ilim);
+	}
+
+	ret = wm831x_reg_unlock(wm831x);
+	if (ret != 0) {
+		dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
+		return;
+	}
+
+	ret = wm831x_set_bits(wm831x, WM831X_BACKUP_CHARGER_CONTROL,
+			      WM831X_BKUP_CHG_ENA_MASK |
+			      WM831X_BKUP_CHG_MODE_MASK |
+			      WM831X_BKUP_BATT_DET_ENA_MASK |
+			      WM831X_BKUP_CHG_VLIM_MASK |
+			      WM831X_BKUP_CHG_ILIM_MASK,
+			      reg);
+	if (ret != 0)
+		dev_err(wm831x->dev,
+			"Failed to set backup charger config: %d\n", ret);
+
+	wm831x_reg_lock(wm831x);
+}
+
+static int wm831x_backup_get_prop(struct power_supply *psy,
+				  enum power_supply_property psp,
+				  union power_supply_propval *val)
+{
+	struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
+	struct wm831x *wm831x = wm831x_power->wm831x;
+	int ret = 0;
+
+	ret = wm831x_reg_read(wm831x, WM831X_BACKUP_CHARGER_CONTROL);
+	if (ret < 0)
+		return ret;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		if (ret & WM831X_BKUP_CHG_STS)
+			val->intval = POWER_SUPPLY_STATUS_CHARGING;
+		else
+			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		break;
+
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BKUP_BATT,
+						val);
+		break;
+
+	case POWER_SUPPLY_PROP_PRESENT:
+		if (ret & WM831X_BKUP_CHG_STS)
+			val->intval = 1;
+		else
+			val->intval = 0;
+		break;
+
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static enum power_supply_property wm831x_backup_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_PRESENT,
+};
+
+/*********************************************************************
+ *		Initialisation
+ *********************************************************************/
+
+static irqreturn_t wm831x_syslo_irq(int irq, void *data)
+{
+	struct wm831x_power *wm831x_power = data;
+	struct wm831x *wm831x = wm831x_power->wm831x;
+
+	/* Not much we can actually *do* but tell people for
+	 * posterity, we're probably about to run out of power. */
+	dev_crit(wm831x->dev, "SYSVDD under voltage\n");
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t wm831x_pwr_src_irq(int irq, void *data)
+{
+	struct wm831x_power *wm831x_power = data;
+	struct wm831x *wm831x = wm831x_power->wm831x;
+
+	dev_dbg(wm831x->dev, "Power source changed\n");
+
+	/* Just notify for everything - little harm in overnotifying.
+	 * The backup battery is not a power source while the system
+	 * is running so skip that.
+	 */
+	power_supply_changed(&wm831x_power->battery);
+	power_supply_changed(&wm831x_power->usb);
+	power_supply_changed(&wm831x_power->wall);
+
+	return IRQ_HANDLED;
+}
+
+static __devinit int wm831x_power_probe(struct platform_device *pdev)
+{
+	struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
+	struct wm831x_power *power;
+	struct power_supply *usb;
+	struct power_supply *battery;
+	struct power_supply *wall;
+	struct power_supply *backup;
+	int ret, irq, i;
+
+	power = kzalloc(sizeof(struct wm831x_power), GFP_KERNEL);
+	if (power == NULL)
+		return -ENOMEM;
+
+	power->wm831x = wm831x;
+	platform_set_drvdata(pdev, power);
+
+	usb = &power->usb;
+	battery = &power->battery;
+	wall = &power->wall;
+	backup = &power->backup;
+
+	/* We ignore configuration failures since we can still read back
+	 * the status without enabling either of the chargers.
+	 */
+	wm831x_config_battery(wm831x);
+	wm831x_config_backup(wm831x);
+
+	wall->name = "wm831x-wall";
+	wall->type = POWER_SUPPLY_TYPE_MAINS;
+	wall->properties = wm831x_wall_props;
+	wall->num_properties = ARRAY_SIZE(wm831x_wall_props);
+	wall->get_property = wm831x_wall_get_prop;
+	ret = power_supply_register(&pdev->dev, wall);
+	if (ret)
+		goto err_kmalloc;
+
+	battery->name = "wm831x-battery";
+	battery->properties = wm831x_bat_props;
+	battery->num_properties = ARRAY_SIZE(wm831x_bat_props);
+	battery->get_property = wm831x_bat_get_prop;
+	battery->use_for_apm = 1;
+	ret = power_supply_register(&pdev->dev, battery);
+	if (ret)
+		goto err_wall;
+
+	usb->name = "wm831x-usb",
+	usb->type = POWER_SUPPLY_TYPE_USB;
+	usb->properties = wm831x_usb_props;
+	usb->num_properties = ARRAY_SIZE(wm831x_usb_props);
+	usb->get_property = wm831x_usb_get_prop;
+	ret = power_supply_register(&pdev->dev, usb);
+	if (ret)
+		goto err_battery;
+
+	backup->name = "wm831x-backup";
+	backup->type = POWER_SUPPLY_TYPE_BATTERY;
+	backup->properties = wm831x_backup_props;
+	backup->num_properties = ARRAY_SIZE(wm831x_backup_props);
+	backup->get_property = wm831x_backup_get_prop;
+	ret = power_supply_register(&pdev->dev, backup);
+	if (ret)
+		goto err_usb;
+
+	irq = platform_get_irq_byname(pdev, "SYSLO");
+	ret = wm831x_request_irq(wm831x, irq, wm831x_syslo_irq,
+				 IRQF_TRIGGER_RISING, "SYSLO",
+				 power);
+	if (ret != 0) {
+		dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
+			irq, ret);
+		goto err_backup;
+	}
+
+	irq = platform_get_irq_byname(pdev, "PWR SRC");
+	ret = wm831x_request_irq(wm831x, irq, wm831x_pwr_src_irq,
+				 IRQF_TRIGGER_RISING, "Power source",
+				 power);
+	if (ret != 0) {
+		dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n",
+			irq, ret);
+		goto err_syslo;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
+		irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
+		ret = wm831x_request_irq(wm831x, irq, wm831x_bat_irq,
+					 IRQF_TRIGGER_RISING,
+					 wm831x_bat_irqs[i],
+					 power);
+		if (ret != 0) {
+			dev_err(&pdev->dev,
+				"Failed to request %s IRQ %d: %d\n",
+				wm831x_bat_irqs[i], irq, ret);
+			goto err_bat_irq;
+		}
+	}
+
+	return ret;
+
+err_bat_irq:
+	for (; i >= 0; i--) {
+		irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
+		wm831x_free_irq(wm831x, irq, power);
+	}
+	irq = platform_get_irq_byname(pdev, "PWR SRC");
+	wm831x_free_irq(wm831x, irq, power);
+err_syslo:
+	irq = platform_get_irq_byname(pdev, "SYSLO");
+	wm831x_free_irq(wm831x, irq, power);
+err_backup:
+	power_supply_unregister(backup);
+err_usb:
+	power_supply_unregister(usb);
+err_battery:
+	power_supply_unregister(battery);
+err_wall:
+	power_supply_unregister(wall);
+err_kmalloc:
+	kfree(power);
+	return ret;
+}
+
+static __devexit int wm831x_power_remove(struct platform_device *pdev)
+{
+	struct wm831x_power *wm831x_power = platform_get_drvdata(pdev);
+	struct wm831x *wm831x = wm831x_power->wm831x;
+	int irq, i;
+
+	for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) {
+		irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]);
+		wm831x_free_irq(wm831x, irq, wm831x_power);
+	}
+
+	irq = platform_get_irq_byname(pdev, "PWR SRC");
+	wm831x_free_irq(wm831x, irq, wm831x_power);
+
+	irq = platform_get_irq_byname(pdev, "SYSLO");
+	wm831x_free_irq(wm831x, irq, wm831x_power);
+
+	power_supply_unregister(&wm831x_power->backup);
+	power_supply_unregister(&wm831x_power->battery);
+	power_supply_unregister(&wm831x_power->wall);
+	power_supply_unregister(&wm831x_power->usb);
+	return 0;
+}
+
+static struct platform_driver wm831x_power_driver = {
+	.probe = wm831x_power_probe,
+	.remove = __devexit_p(wm831x_power_remove),
+	.driver = {
+		.name = "wm831x-power",
+	},
+};
+
+static int __init wm831x_power_init(void)
+{
+	return platform_driver_register(&wm831x_power_driver);
+}
+module_init(wm831x_power_init);
+
+static void __exit wm831x_power_exit(void)
+{
+	platform_driver_unregister(&wm831x_power_driver);
+}
+module_exit(wm831x_power_exit);
+
+MODULE_DESCRIPTION("Power supply driver for WM831x PMICs");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm831x-power");

kernel/drivers/power/wm8350_power.c

@@ -0,0 +1,554 @@
+/*
+ * Battery driver for wm8350 PMIC
+ *
+ * Copyright 2007, 2008 Wolfson Microelectronics PLC.
+ *
+ * Based on OLPC Battery Driver
+ *
+ * Copyright 2006  David Woodhouse <dwmw2@infradead.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/mfd/wm8350/supply.h>
+#include <linux/mfd/wm8350/core.h>
+#include <linux/mfd/wm8350/comparator.h>
+
+static int wm8350_read_battery_uvolts(struct wm8350 *wm8350)
+{
+	return wm8350_read_auxadc(wm8350, WM8350_AUXADC_BATT, 0, 0)
+		* WM8350_AUX_COEFF;
+}
+
+static int wm8350_read_line_uvolts(struct wm8350 *wm8350)
+{
+	return wm8350_read_auxadc(wm8350, WM8350_AUXADC_LINE, 0, 0)
+		* WM8350_AUX_COEFF;
+}
+
+static int wm8350_read_usb_uvolts(struct wm8350 *wm8350)
+{
+	return wm8350_read_auxadc(wm8350, WM8350_AUXADC_USB, 0, 0)
+		* WM8350_AUX_COEFF;
+}
+
+#define WM8350_BATT_SUPPLY	1
+#define WM8350_USB_SUPPLY	2
+#define WM8350_LINE_SUPPLY	4
+
+static inline int wm8350_charge_time_min(struct wm8350 *wm8350, int min)
+{
+	if (!wm8350->power.rev_g_coeff)
+		return (((min - 30) / 15) & 0xf) << 8;
+	else
+		return (((min - 30) / 30) & 0xf) << 8;
+}
+
+static int wm8350_get_supplies(struct wm8350 *wm8350)
+{
+	u16 sm, ov, co, chrg;
+	int supplies = 0;
+
+	sm = wm8350_reg_read(wm8350, WM8350_STATE_MACHINE_STATUS);
+	ov = wm8350_reg_read(wm8350, WM8350_MISC_OVERRIDES);
+	co = wm8350_reg_read(wm8350, WM8350_COMPARATOR_OVERRIDES);
+	chrg = wm8350_reg_read(wm8350, WM8350_BATTERY_CHARGER_CONTROL_2);
+
+	/* USB_SM */
+	sm = (sm & WM8350_USB_SM_MASK) >> WM8350_USB_SM_SHIFT;
+
+	/* CHG_ISEL */
+	chrg &= WM8350_CHG_ISEL_MASK;
+
+	/* If the USB state machine is active then we're using that with or
+	 * without battery, otherwise check for wall supply */
+	if (((sm == WM8350_USB_SM_100_SLV) ||
+	     (sm == WM8350_USB_SM_500_SLV) ||
+	     (sm == WM8350_USB_SM_STDBY_SLV))
+	    && !(ov & WM8350_USB_LIMIT_OVRDE))
+		supplies = WM8350_USB_SUPPLY;
+	else if (((sm == WM8350_USB_SM_100_SLV) ||
+		  (sm == WM8350_USB_SM_500_SLV) ||
+		  (sm == WM8350_USB_SM_STDBY_SLV))
+		 && (ov & WM8350_USB_LIMIT_OVRDE) && (chrg == 0))
+		supplies = WM8350_USB_SUPPLY | WM8350_BATT_SUPPLY;
+	else if (co & WM8350_WALL_FB_OVRDE)
+		supplies = WM8350_LINE_SUPPLY;
+	else
+		supplies = WM8350_BATT_SUPPLY;
+
+	return supplies;
+}
+
+static int wm8350_charger_config(struct wm8350 *wm8350,
+				 struct wm8350_charger_policy *policy)
+{
+	u16 reg, eoc_mA, fast_limit_mA;
+
+	if (!policy) {
+		dev_warn(wm8350->dev,
+			 "No charger policy, charger not configured.\n");
+		return -EINVAL;
+	}
+
+	/* make sure USB fast charge current is not > 500mA */
+	if (policy->fast_limit_USB_mA > 500) {
+		dev_err(wm8350->dev, "USB fast charge > 500mA\n");
+		return -EINVAL;
+	}
+
+	eoc_mA = WM8350_CHG_EOC_mA(policy->eoc_mA);
+
+	wm8350_reg_unlock(wm8350);
+
+	reg = wm8350_reg_read(wm8350, WM8350_BATTERY_CHARGER_CONTROL_1)
+		& WM8350_CHG_ENA_R168;
+	wm8350_reg_write(wm8350, WM8350_BATTERY_CHARGER_CONTROL_1,
+			 reg | eoc_mA | policy->trickle_start_mV |
+			 WM8350_CHG_TRICKLE_TEMP_CHOKE |
+			 WM8350_CHG_TRICKLE_USB_CHOKE |
+			 WM8350_CHG_FAST_USB_THROTTLE);
+
+	if (wm8350_get_supplies(wm8350) & WM8350_USB_SUPPLY) {
+		fast_limit_mA =
+			WM8350_CHG_FAST_LIMIT_mA(policy->fast_limit_USB_mA);
+		wm8350_reg_write(wm8350, WM8350_BATTERY_CHARGER_CONTROL_2,
+			    policy->charge_mV | policy->trickle_charge_USB_mA |
+			    fast_limit_mA | wm8350_charge_time_min(wm8350,
+						policy->charge_timeout));
+
+	} else {
+		fast_limit_mA =
+			WM8350_CHG_FAST_LIMIT_mA(policy->fast_limit_mA);
+		wm8350_reg_write(wm8350, WM8350_BATTERY_CHARGER_CONTROL_2,
+			    policy->charge_mV | policy->trickle_charge_mA |
+			    fast_limit_mA | wm8350_charge_time_min(wm8350,
+						policy->charge_timeout));
+	}
+
+	wm8350_reg_lock(wm8350);
+	return 0;
+}
+
+static int wm8350_batt_status(struct wm8350 *wm8350)
+{
+	u16 state;
+
+	state = wm8350_reg_read(wm8350, WM8350_BATTERY_CHARGER_CONTROL_2);
+	state &= WM8350_CHG_STS_MASK;
+
+	switch (state) {
+	case WM8350_CHG_STS_OFF:
+		return POWER_SUPPLY_STATUS_DISCHARGING;
+
+	case WM8350_CHG_STS_TRICKLE:
+	case WM8350_CHG_STS_FAST:
+		return POWER_SUPPLY_STATUS_CHARGING;
+
+	default:
+		return POWER_SUPPLY_STATUS_UNKNOWN;
+	}
+}
+
+static ssize_t charger_state_show(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	struct wm8350 *wm8350 = dev_get_drvdata(dev);
+	char *charge;
+	int state;
+
+	state = wm8350_reg_read(wm8350, WM8350_BATTERY_CHARGER_CONTROL_2) &
+	    WM8350_CHG_STS_MASK;
+	switch (state) {
+	case WM8350_CHG_STS_OFF:
+		charge = "Charger Off";
+		break;
+	case WM8350_CHG_STS_TRICKLE:
+		charge = "Trickle Charging";
+		break;
+	case WM8350_CHG_STS_FAST:
+		charge = "Fast Charging";
+		break;
+	default:
+		return 0;
+	}
+
+	return sprintf(buf, "%s\n", charge);
+}
+
+static DEVICE_ATTR(charger_state, 0444, charger_state_show, NULL);
+
+static void wm8350_charger_handler(struct wm8350 *wm8350, int irq, void *data)
+{
+	struct wm8350_power *power = &wm8350->power;
+	struct wm8350_charger_policy *policy = power->policy;
+
+	switch (irq) {
+	case WM8350_IRQ_CHG_BAT_FAIL:
+		dev_err(wm8350->dev, "battery failed\n");
+		break;
+	case WM8350_IRQ_CHG_TO:
+		dev_err(wm8350->dev, "charger timeout\n");
+		power_supply_changed(&power->battery);
+		break;
+
+	case WM8350_IRQ_CHG_BAT_HOT:
+	case WM8350_IRQ_CHG_BAT_COLD:
+	case WM8350_IRQ_CHG_START:
+	case WM8350_IRQ_CHG_END:
+		power_supply_changed(&power->battery);
+		break;
+
+	case WM8350_IRQ_CHG_FAST_RDY:
+		dev_dbg(wm8350->dev, "fast charger ready\n");
+		wm8350_charger_config(wm8350, policy);
+		wm8350_reg_unlock(wm8350);
+		wm8350_set_bits(wm8350, WM8350_BATTERY_CHARGER_CONTROL_1,
+				WM8350_CHG_FAST);
+		wm8350_reg_lock(wm8350);
+		break;
+
+	case WM8350_IRQ_CHG_VBATT_LT_3P9:
+		dev_warn(wm8350->dev, "battery < 3.9V\n");
+		break;
+	case WM8350_IRQ_CHG_VBATT_LT_3P1:
+		dev_warn(wm8350->dev, "battery < 3.1V\n");
+		break;
+	case WM8350_IRQ_CHG_VBATT_LT_2P85:
+		dev_warn(wm8350->dev, "battery < 2.85V\n");
+		break;
+
+		/* Supply change.  We will overnotify but it should do
+		 * no harm. */
+	case WM8350_IRQ_EXT_USB_FB:
+	case WM8350_IRQ_EXT_WALL_FB:
+		wm8350_charger_config(wm8350, policy);
+	case WM8350_IRQ_EXT_BAT_FB:   /* Fall through */
+		power_supply_changed(&power->battery);
+		power_supply_changed(&power->usb);
+		power_supply_changed(&power->ac);
+		break;
+
+	default:
+		dev_err(wm8350->dev, "Unknown interrupt %d\n", irq);
+	}
+}
+
+/*********************************************************************
+ *		AC Power
+ *********************************************************************/
+static int wm8350_ac_get_prop(struct power_supply *psy,
+			      enum power_supply_property psp,
+			      union power_supply_propval *val)
+{
+	struct wm8350 *wm8350 = dev_get_drvdata(psy->dev->parent);
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = !!(wm8350_get_supplies(wm8350) &
+				 WM8350_LINE_SUPPLY);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		val->intval = wm8350_read_line_uvolts(wm8350);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static enum power_supply_property wm8350_ac_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+};
+
+/*********************************************************************
+ *		USB Power
+ *********************************************************************/
+static int wm8350_usb_get_prop(struct power_supply *psy,
+			       enum power_supply_property psp,
+			       union power_supply_propval *val)
+{
+	struct wm8350 *wm8350 = dev_get_drvdata(psy->dev->parent);
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = !!(wm8350_get_supplies(wm8350) &
+				 WM8350_USB_SUPPLY);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		val->intval = wm8350_read_usb_uvolts(wm8350);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
+static enum power_supply_property wm8350_usb_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+};
+
+/*********************************************************************
+ *		Battery properties
+ *********************************************************************/
+
+static int wm8350_bat_check_health(struct wm8350 *wm8350)
+{
+	u16 reg;
+
+	if (wm8350_read_battery_uvolts(wm8350) < 2850000)
+		return POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+
+	reg = wm8350_reg_read(wm8350, WM8350_CHARGER_OVERRIDES);
+	if (reg & WM8350_CHG_BATT_HOT_OVRDE)
+		return POWER_SUPPLY_HEALTH_OVERHEAT;
+
+	if (reg & WM8350_CHG_BATT_COLD_OVRDE)
+		return POWER_SUPPLY_HEALTH_COLD;
+
+	return POWER_SUPPLY_HEALTH_GOOD;
+}
+
+static int wm8350_bat_get_charge_type(struct wm8350 *wm8350)
+{
+	int state;
+
+	state = wm8350_reg_read(wm8350, WM8350_BATTERY_CHARGER_CONTROL_2) &
+	    WM8350_CHG_STS_MASK;
+	switch (state) {
+	case WM8350_CHG_STS_OFF:
+		return POWER_SUPPLY_CHARGE_TYPE_NONE;
+	case WM8350_CHG_STS_TRICKLE:
+		return POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+	case WM8350_CHG_STS_FAST:
+		return POWER_SUPPLY_CHARGE_TYPE_FAST;
+	default:
+		return POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+	}
+}
+
+static int wm8350_bat_get_property(struct power_supply *psy,
+				   enum power_supply_property psp,
+				   union power_supply_propval *val)
+{
+	struct wm8350 *wm8350 = dev_get_drvdata(psy->dev->parent);
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		val->intval = wm8350_batt_status(wm8350);
+		break;
+	case POWER_SUPPLY_PROP_ONLINE:
+		val->intval = !!(wm8350_get_supplies(wm8350) &
+				 WM8350_BATT_SUPPLY);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		val->intval = wm8350_read_battery_uvolts(wm8350);
+		break;
+	case POWER_SUPPLY_PROP_HEALTH:
+		val->intval = wm8350_bat_check_health(wm8350);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		val->intval = wm8350_bat_get_charge_type(wm8350);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	return ret;
+}
+
+static enum power_supply_property wm8350_bat_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+};
+
+/*********************************************************************
+ *		Initialisation
+ *********************************************************************/
+
+static void wm8350_init_charger(struct wm8350 *wm8350)
+{
+	/* register our interest in charger events */
+	wm8350_register_irq(wm8350, WM8350_IRQ_CHG_BAT_HOT,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_CHG_BAT_HOT);
+	wm8350_register_irq(wm8350, WM8350_IRQ_CHG_BAT_COLD,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_CHG_BAT_COLD);
+	wm8350_register_irq(wm8350, WM8350_IRQ_CHG_BAT_FAIL,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_CHG_BAT_FAIL);
+	wm8350_register_irq(wm8350, WM8350_IRQ_CHG_TO,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_CHG_TO);
+	wm8350_register_irq(wm8350, WM8350_IRQ_CHG_END,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_CHG_END);
+	wm8350_register_irq(wm8350, WM8350_IRQ_CHG_START,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_CHG_START);
+	wm8350_register_irq(wm8350, WM8350_IRQ_CHG_FAST_RDY,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_CHG_FAST_RDY);
+	wm8350_register_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_3P9,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_3P9);
+	wm8350_register_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_3P1,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_3P1);
+	wm8350_register_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_2P85,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_2P85);
+
+	/* and supply change events */
+	wm8350_register_irq(wm8350, WM8350_IRQ_EXT_USB_FB,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_EXT_USB_FB);
+	wm8350_register_irq(wm8350, WM8350_IRQ_EXT_WALL_FB,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_EXT_WALL_FB);
+	wm8350_register_irq(wm8350, WM8350_IRQ_EXT_BAT_FB,
+			    wm8350_charger_handler, NULL);
+	wm8350_unmask_irq(wm8350, WM8350_IRQ_EXT_BAT_FB);
+}
+
+static void free_charger_irq(struct wm8350 *wm8350)
+{
+	wm8350_mask_irq(wm8350, WM8350_IRQ_CHG_BAT_HOT);
+	wm8350_free_irq(wm8350, WM8350_IRQ_CHG_BAT_HOT);
+	wm8350_mask_irq(wm8350, WM8350_IRQ_CHG_BAT_COLD);
+	wm8350_free_irq(wm8350, WM8350_IRQ_CHG_BAT_COLD);
+	wm8350_mask_irq(wm8350, WM8350_IRQ_CHG_BAT_FAIL);
+	wm8350_free_irq(wm8350, WM8350_IRQ_CHG_BAT_FAIL);
+	wm8350_mask_irq(wm8350, WM8350_IRQ_CHG_TO);
+	wm8350_free_irq(wm8350, WM8350_IRQ_CHG_TO);
+	wm8350_mask_irq(wm8350, WM8350_IRQ_CHG_END);
+	wm8350_free_irq(wm8350, WM8350_IRQ_CHG_END);
+	wm8350_mask_irq(wm8350, WM8350_IRQ_CHG_START);
+	wm8350_free_irq(wm8350, WM8350_IRQ_CHG_START);
+	wm8350_mask_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_3P9);
+	wm8350_free_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_3P9);
+	wm8350_mask_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_3P1);
+	wm8350_free_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_3P1);
+	wm8350_mask_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_2P85);
+	wm8350_free_irq(wm8350, WM8350_IRQ_CHG_VBATT_LT_2P85);
+	wm8350_mask_irq(wm8350, WM8350_IRQ_EXT_USB_FB);
+	wm8350_free_irq(wm8350, WM8350_IRQ_EXT_USB_FB);
+	wm8350_mask_irq(wm8350, WM8350_IRQ_EXT_WALL_FB);
+	wm8350_free_irq(wm8350, WM8350_IRQ_EXT_WALL_FB);
+	wm8350_mask_irq(wm8350, WM8350_IRQ_EXT_BAT_FB);
+	wm8350_free_irq(wm8350, WM8350_IRQ_EXT_BAT_FB);
+}
+
+static __devinit int wm8350_power_probe(struct platform_device *pdev)
+{
+	struct wm8350 *wm8350 = platform_get_drvdata(pdev);
+	struct wm8350_power *power = &wm8350->power;
+	struct wm8350_charger_policy *policy = power->policy;
+	struct power_supply *usb = &power->usb;
+	struct power_supply *battery = &power->battery;
+	struct power_supply *ac = &power->ac;
+	int ret;
+
+	ac->name = "wm8350-ac";
+	ac->type = POWER_SUPPLY_TYPE_MAINS;
+	ac->properties = wm8350_ac_props;
+	ac->num_properties = ARRAY_SIZE(wm8350_ac_props);
+	ac->get_property = wm8350_ac_get_prop;
+	ret = power_supply_register(&pdev->dev, ac);
+	if (ret)
+		return ret;
+
+	battery->name = "wm8350-battery";
+	battery->properties = wm8350_bat_props;
+	battery->num_properties = ARRAY_SIZE(wm8350_bat_props);
+	battery->get_property = wm8350_bat_get_property;
+	battery->use_for_apm = 1;
+	ret = power_supply_register(&pdev->dev, battery);
+	if (ret)
+		goto battery_failed;
+
+	usb->name = "wm8350-usb",
+	usb->type = POWER_SUPPLY_TYPE_USB;
+	usb->properties = wm8350_usb_props;
+	usb->num_properties = ARRAY_SIZE(wm8350_usb_props);
+	usb->get_property = wm8350_usb_get_prop;
+	ret = power_supply_register(&pdev->dev, usb);
+	if (ret)
+		goto usb_failed;
+
+	ret = device_create_file(&pdev->dev, &dev_attr_charger_state);
+	if (ret < 0)
+		dev_warn(wm8350->dev, "failed to add charge sysfs: %d\n", ret);
+	ret = 0;
+
+	wm8350_init_charger(wm8350);
+	if (wm8350_charger_config(wm8350, policy) == 0) {
+		wm8350_reg_unlock(wm8350);
+		wm8350_set_bits(wm8350, WM8350_POWER_MGMT_5, WM8350_CHG_ENA);
+		wm8350_reg_lock(wm8350);
+	}
+
+	return ret;
+
+usb_failed:
+	power_supply_unregister(battery);
+battery_failed:
+	power_supply_unregister(ac);
+
+	return ret;
+}
+
+static __devexit int wm8350_power_remove(struct platform_device *pdev)
+{
+	struct wm8350 *wm8350 = platform_get_drvdata(pdev);
+	struct wm8350_power *power = &wm8350->power;
+
+	free_charger_irq(wm8350);
+	device_remove_file(&pdev->dev, &dev_attr_charger_state);
+	power_supply_unregister(&power->battery);
+	power_supply_unregister(&power->ac);
+	power_supply_unregister(&power->usb);
+	return 0;
+}
+
+static struct platform_driver wm8350_power_driver = {
+	.probe = wm8350_power_probe,
+	.remove = __devexit_p(wm8350_power_remove),
+	.driver = {
+		.name = "wm8350-power",
+	},
+};
+
+static int __init wm8350_power_init(void)
+{
+	return platform_driver_register(&wm8350_power_driver);
+}
+module_init(wm8350_power_init);
+
+static void __exit wm8350_power_exit(void)
+{
+	platform_driver_unregister(&wm8350_power_driver);
+}
+module_exit(wm8350_power_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Power supply driver for WM8350");
+MODULE_ALIAS("platform:wm8350-power");

kernel/drivers/power/wm97xx_battery.c

@@ -0,0 +1,315 @@
+/*
+ * linux/drivers/power/wm97xx_battery.c
+ *
+ * Battery measurement code for WM97xx
+ *
+ * based on tosa_battery.c
+ *
+ * Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/wm97xx.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
+
+static DEFINE_MUTEX(bat_lock);
+static struct work_struct bat_work;
+struct mutex work_lock;
+static int bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
+static struct wm97xx_batt_info *gpdata;
+static enum power_supply_property *prop;
+
+static unsigned long wm97xx_read_bat(struct power_supply *bat_ps)
+{
+	struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
+	struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
+
+	return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev->parent),
+					pdata->batt_aux) * pdata->batt_mult /
+					pdata->batt_div;
+}
+
+static unsigned long wm97xx_read_temp(struct power_supply *bat_ps)
+{
+	struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
+	struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
+
+	return wm97xx_read_aux_adc(dev_get_drvdata(bat_ps->dev->parent),
+					pdata->temp_aux) * pdata->temp_mult /
+					pdata->temp_div;
+}
+
+static int wm97xx_bat_get_property(struct power_supply *bat_ps,
+			    enum power_supply_property psp,
+			    union power_supply_propval *val)
+{
+	struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
+	struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		val->intval = bat_status;
+		break;
+	case POWER_SUPPLY_PROP_TECHNOLOGY:
+		val->intval = pdata->batt_tech;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		if (pdata->batt_aux >= 0)
+			val->intval = wm97xx_read_bat(bat_ps);
+		else
+			return -EINVAL;
+		break;
+	case POWER_SUPPLY_PROP_TEMP:
+		if (pdata->temp_aux >= 0)
+			val->intval = wm97xx_read_temp(bat_ps);
+		else
+			return -EINVAL;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+		if (pdata->max_voltage >= 0)
+			val->intval = pdata->max_voltage;
+		else
+			return -EINVAL;
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_MIN:
+		if (pdata->min_voltage >= 0)
+			val->intval = pdata->min_voltage;
+		else
+			return -EINVAL;
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		val->intval = 1;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static void wm97xx_bat_external_power_changed(struct power_supply *bat_ps)
+{
+	schedule_work(&bat_work);
+}
+
+static void wm97xx_bat_update(struct power_supply *bat_ps)
+{
+	int old_status = bat_status;
+	struct wm97xx_pdata *wmdata = bat_ps->dev->parent->platform_data;
+	struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
+
+	mutex_lock(&work_lock);
+
+	bat_status = (pdata->charge_gpio >= 0) ?
+			(gpio_get_value(pdata->charge_gpio) ?
+			POWER_SUPPLY_STATUS_DISCHARGING :
+			POWER_SUPPLY_STATUS_CHARGING) :
+			POWER_SUPPLY_STATUS_UNKNOWN;
+
+	if (old_status != bat_status) {
+		pr_debug("%s: %i -> %i\n", bat_ps->name, old_status,
+					bat_status);
+		power_supply_changed(bat_ps);
+	}
+
+	mutex_unlock(&work_lock);
+}
+
+static struct power_supply bat_ps = {
+	.type			= POWER_SUPPLY_TYPE_BATTERY,
+	.get_property		= wm97xx_bat_get_property,
+	.external_power_changed = wm97xx_bat_external_power_changed,
+	.use_for_apm		= 1,
+};
+
+static void wm97xx_bat_work(struct work_struct *work)
+{
+	wm97xx_bat_update(&bat_ps);
+}
+
+static irqreturn_t wm97xx_chrg_irq(int irq, void *data)
+{
+	schedule_work(&bat_work);
+	return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_PM
+static int wm97xx_bat_suspend(struct device *dev)
+{
+	flush_scheduled_work();
+	return 0;
+}
+
+static int wm97xx_bat_resume(struct device *dev)
+{
+	schedule_work(&bat_work);
+	return 0;
+}
+
+static struct dev_pm_ops wm97xx_bat_pm_ops = {
+	.suspend	= wm97xx_bat_suspend,
+	.resume		= wm97xx_bat_resume,
+};
+#endif
+
+static int __devinit wm97xx_bat_probe(struct platform_device *dev)
+{
+	int ret = 0;
+	int props = 1;	/* POWER_SUPPLY_PROP_PRESENT */
+	int i = 0;
+	struct wm97xx_pdata *wmdata = dev->dev.platform_data;
+	struct wm97xx_batt_pdata *pdata;
+
+	if (gpdata) {
+		dev_err(&dev->dev, "Do not pass platform_data through "
+			"wm97xx_bat_set_pdata!\n");
+		return -EINVAL;
+	} else
+		pdata = wmdata->batt_pdata;
+
+	if (dev->id != -1)
+		return -EINVAL;
+
+	mutex_init(&work_lock);
+
+	if (!pdata) {
+		dev_err(&dev->dev, "No platform_data supplied\n");
+		return -EINVAL;
+	}
+
+	if (gpio_is_valid(pdata->charge_gpio)) {
+		ret = gpio_request(pdata->charge_gpio, "BATT CHRG");
+		if (ret)
+			goto err;
+		ret = gpio_direction_input(pdata->charge_gpio);
+		if (ret)
+			goto err2;
+		ret = request_irq(gpio_to_irq(pdata->charge_gpio),
+				wm97xx_chrg_irq, IRQF_DISABLED,
+				"AC Detect", 0);
+		if (ret)
+			goto err2;
+		props++;	/* POWER_SUPPLY_PROP_STATUS */
+	}
+
+	if (pdata->batt_tech >= 0)
+		props++;	/* POWER_SUPPLY_PROP_TECHNOLOGY */
+	if (pdata->temp_aux >= 0)
+		props++;	/* POWER_SUPPLY_PROP_TEMP */
+	if (pdata->batt_aux >= 0)
+		props++;	/* POWER_SUPPLY_PROP_VOLTAGE_NOW */
+	if (pdata->max_voltage >= 0)
+		props++;	/* POWER_SUPPLY_PROP_VOLTAGE_MAX */
+	if (pdata->min_voltage >= 0)
+		props++;	/* POWER_SUPPLY_PROP_VOLTAGE_MIN */
+
+	prop = kzalloc(props * sizeof(*prop), GFP_KERNEL);
+	if (!prop)
+		goto err3;
+
+	prop[i++] = POWER_SUPPLY_PROP_PRESENT;
+	if (pdata->charge_gpio >= 0)
+		prop[i++] = POWER_SUPPLY_PROP_STATUS;
+	if (pdata->batt_tech >= 0)
+		prop[i++] = POWER_SUPPLY_PROP_TECHNOLOGY;
+	if (pdata->temp_aux >= 0)
+		prop[i++] = POWER_SUPPLY_PROP_TEMP;
+	if (pdata->batt_aux >= 0)
+		prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_NOW;
+	if (pdata->max_voltage >= 0)
+		prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MAX;
+	if (pdata->min_voltage >= 0)
+		prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MIN;
+
+	INIT_WORK(&bat_work, wm97xx_bat_work);
+
+	if (!pdata->batt_name) {
+		dev_info(&dev->dev, "Please consider setting proper battery "
+				"name in platform definition file, falling "
+				"back to name \"wm97xx-batt\"\n");
+		bat_ps.name = "wm97xx-batt";
+	} else
+		bat_ps.name = pdata->batt_name;
+
+	bat_ps.properties = prop;
+	bat_ps.num_properties = props;
+
+	ret = power_supply_register(&dev->dev, &bat_ps);
+	if (!ret)
+		schedule_work(&bat_work);
+	else
+		goto err4;
+
+	return 0;
+err4:
+	kfree(prop);
+err3:
+	if (gpio_is_valid(pdata->charge_gpio))
+		free_irq(gpio_to_irq(pdata->charge_gpio), dev);
+err2:
+	if (gpio_is_valid(pdata->charge_gpio))
+		gpio_free(pdata->charge_gpio);
+err:
+	return ret;
+}
+
+static int __devexit wm97xx_bat_remove(struct platform_device *dev)
+{
+	struct wm97xx_pdata *wmdata = dev->dev.platform_data;
+	struct wm97xx_batt_pdata *pdata = wmdata->batt_pdata;
+
+	if (pdata && gpio_is_valid(pdata->charge_gpio)) {
+		free_irq(gpio_to_irq(pdata->charge_gpio), dev);
+		gpio_free(pdata->charge_gpio);
+	}
+	flush_scheduled_work();
+	power_supply_unregister(&bat_ps);
+	kfree(prop);
+	return 0;
+}
+
+static struct platform_driver wm97xx_bat_driver = {
+	.driver	= {
+		.name	= "wm97xx-battery",
+		.owner	= THIS_MODULE,
+#ifdef CONFIG_PM
+		.pm	= &wm97xx_bat_pm_ops,
+#endif
+	},
+	.probe		= wm97xx_bat_probe,
+	.remove		= __devexit_p(wm97xx_bat_remove),
+};
+
+static int __init wm97xx_bat_init(void)
+{
+	return platform_driver_register(&wm97xx_bat_driver);
+}
+
+static void __exit wm97xx_bat_exit(void)
+{
+	platform_driver_unregister(&wm97xx_bat_driver);
+}
+
+void wm97xx_bat_set_pdata(struct wm97xx_batt_info *data)
+{
+	gpdata = data;
+}
+EXPORT_SYMBOL_GPL(wm97xx_bat_set_pdata);
+
+module_init(wm97xx_bat_init);
+module_exit(wm97xx_bat_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
+MODULE_DESCRIPTION("WM97xx battery driver");