104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
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/*******************************************************************************
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*
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* File name : clock-oslayer.h
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* Description : Low Level API - OS Specifics
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*
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* COPYRIGHT (C) 2009 STMicroelectronics - All Rights Reserved
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* This file is under the GPL 2 License.
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*
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******************************************************************************/
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#ifndef __CLKLLA_OSLAYER_H
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#define __CLKLLA_OSLAYER_H
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#include <linux/io.h>
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#include <linux/stm/sysconf.h>
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#include <linux/stm/gpio.h>
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#include <linux/stm/pio.h>
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#include <asm-generic/errno-base.h>
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#define clk_t struct clk
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#define CLK_RATE_PROPAGATES 0
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/* Register access macros */
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#define CLK_READ(addr) ioread32((void *)addr)
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#define CLK_WRITE(addr, val) iowrite32(val, (void *)addr)
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#define SYSCONF(type, num, lsb, msb) \
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static struct sysconf_field *sys_##type##_##num##_##lsb##_##msb
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#define SYSCONF_CLAIM(type, num, lsb, msb) \
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sys_##type##_##num##_##lsb##_##msb = \
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sysconf_claim(type, num, lsb, msb, "Clk lla")
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#define SYSCONF_READ(type, num, lsb, msb) \
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sysconf_read(sys_##type##_##num##_##lsb##_##msb)
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#define SYSCONF_WRITE(type, num, lsb, msb, value) \
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sysconf_write(sys_##type##_##num##_##lsb##_##msb, value)
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static inline
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void PIO_SET_MODE(unsigned long bank, unsigned long line, long mode)
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{
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static int pin = -ENOSYS;
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if (pin == -ENOSYS)
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gpio_request(stm_gpio(bank, line), "Clk Observer");
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if (pin >= 0)
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stm_gpio_direction(pin, mode);
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}
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#define _CLK_OPS(_name, _desc, _init, _setparent, _setfreq, _recalc, \
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_enable, _disable, _observe, _measure, _obspoint) \
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static struct clk_ops _name = { \
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.init = _init, \
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.set_parent = _setparent, \
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.set_rate = _setfreq, \
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.recalc = _recalc, \
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.enable = _enable, \
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.disable = _disable, \
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.observe = _observe, \
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.get_measure = _measure, \
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}
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#define _CLK(_id, _ops, _nominal, _flags) \
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[_id] = (clk_t){ .name = #_id, \
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.id = (_id), \
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.ops = (_ops), \
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.flags = (_flags), \
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}
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#define _CLK_P(_id, _ops, _nominal, _flags, _parent) \
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[_id] = (clk_t){ .name = #_id, \
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.id = (_id), \
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.ops = (_ops), \
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.flags = (_flags), \
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.parent = (_parent), \
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}
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#define _CLK_F(_id, _rate) \
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[_id] = (clk_t) { \
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.name = #_id, \
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.id = (_id), \
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.rate = (_rate), \
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}
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/* Low level API errors */
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enum clk_err {
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CLK_ERR_NONE = 0,
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CLK_ERR_FEATURE_NOT_SUPPORTED = -EPERM,
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CLK_ERR_BAD_PARAMETER = -EINVAL,
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CLK_ERR_INTERNAL = -EFAULT /* Internal & fatal error */
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};
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/* Retrieving chip cut (major) */
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static inline unsigned long chip_major_version(void)
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{
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return cpu_data->cut_major;
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}
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#endif /* #ifndef __CLKLLA_OSLAYER_H */
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