99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
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/*
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* linux/drivers/leds/leds-mb374.c
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*
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* Copyright (C) 2007 STMicroelectronics Limited
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* Author: Stuart Menefy <stuart.menefy@st.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/leds.h>
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#include <linux/stm/pio.h>
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#include <asm/io.h>
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#include <asm/mb374/epld.h>
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struct mb374_led {
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struct led_classdev cdev;
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union {
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struct stpio_pin *pio;
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int bit;
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} u;
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};
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static void mb374_led_pio_set(struct led_classdev *led_cdev, enum led_brightness brightness)
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{
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struct mb374_led *led_dev =
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container_of(led_cdev, struct mb374_led, cdev);
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stpio_set_pin(led_dev->u.pio, brightness);
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}
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static void mb374_led_epld_set(struct led_classdev *led_cdev, enum led_brightness brightness)
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{
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struct mb374_led *led_dev =
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container_of(led_cdev, struct mb374_led, cdev);
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ctrl_outl(1 << led_dev->u.bit, brightness ? EPLD_LED_SET : EPLD_LED_CLR);
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}
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#define MB374_EPLD_LED(_n, _bit) \
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{ \
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.cdev = { \
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.name = "mb374-led" #_n, \
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.brightness_set = mb374_led_epld_set, \
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}, \
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.u.bit = _bit \
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}
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#define MB374_PIO_LED(_n) \
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{ \
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.cdev = { \
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.name = "mb374-led" #_n, \
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.brightness_set = mb374_led_pio_set, \
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}, \
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}
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static struct mb374_led mb374_leds[8] = {
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MB374_EPLD_LED(0,0),
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MB374_EPLD_LED(1,1),
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MB374_EPLD_LED(2,2),
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MB374_EPLD_LED(3,3),
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MB374_EPLD_LED(4,4),
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MB374_EPLD_LED(5,5),
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MB374_PIO_LED(6),
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MB374_PIO_LED(7)
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};
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static int __init mb374_led_init(void)
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{
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int i;
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mb374_leds[6].u.pio = stpio_request_pin(0,3, "LED", STPIO_OUT);
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mb374_leds[7].u.pio = stpio_request_pin(0,0, "LED", STPIO_OUT);
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mb374_leds[0].cdev.default_trigger = "heartbeat";
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for (i=0; i<8; i++) {
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led_classdev_register(NULL, &mb374_leds[i].cdev);
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}
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}
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static void __exit mb374_led_exit(void)
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{
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int i;
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for (i=0; i<8; i++) {
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led_classdev_unregister(&mb374_leds[i].cdev);
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}
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}
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module_init(mb374_led_init);
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module_exit(mb374_led_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Front LED support for Mb374 Server");
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MODULE_AUTHOR("Stuart Menefy <stuart.menefy@st.com>");
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