mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 08:44:21 +08:00
0e777366fb
i2c_driver does not need to set an owner because i2c_register_driver() will set it. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
352 lines
9.1 KiB
C
352 lines
9.1 KiB
C
/*
|
|
* max8907.c - mfd driver for MAX8907
|
|
*
|
|
* Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
|
|
* Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved.
|
|
*
|
|
* 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/err.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/max8907.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/slab.h>
|
|
|
|
static const struct mfd_cell max8907_cells[] = {
|
|
{ .name = "max8907-regulator", },
|
|
{ .name = "max8907-rtc", },
|
|
};
|
|
|
|
static bool max8907_gen_is_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case MAX8907_REG_ON_OFF_IRQ1:
|
|
case MAX8907_REG_ON_OFF_STAT:
|
|
case MAX8907_REG_ON_OFF_IRQ2:
|
|
case MAX8907_REG_CHG_IRQ1:
|
|
case MAX8907_REG_CHG_IRQ2:
|
|
case MAX8907_REG_CHG_STAT:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool max8907_gen_is_precious_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case MAX8907_REG_ON_OFF_IRQ1:
|
|
case MAX8907_REG_ON_OFF_IRQ2:
|
|
case MAX8907_REG_CHG_IRQ1:
|
|
case MAX8907_REG_CHG_IRQ2:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool max8907_gen_is_writeable_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
return !max8907_gen_is_volatile_reg(dev, reg);
|
|
}
|
|
|
|
static const struct regmap_config max8907_regmap_gen_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.volatile_reg = max8907_gen_is_volatile_reg,
|
|
.precious_reg = max8907_gen_is_precious_reg,
|
|
.writeable_reg = max8907_gen_is_writeable_reg,
|
|
.max_register = MAX8907_REG_LDO20VOUT,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
};
|
|
|
|
static bool max8907_rtc_is_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
if (reg <= MAX8907_REG_RTC_YEAR2)
|
|
return true;
|
|
|
|
switch (reg) {
|
|
case MAX8907_REG_RTC_STATUS:
|
|
case MAX8907_REG_RTC_IRQ:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool max8907_rtc_is_precious_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case MAX8907_REG_RTC_IRQ:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool max8907_rtc_is_writeable_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case MAX8907_REG_RTC_STATUS:
|
|
case MAX8907_REG_RTC_IRQ:
|
|
return false;
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
static const struct regmap_config max8907_regmap_rtc_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.volatile_reg = max8907_rtc_is_volatile_reg,
|
|
.precious_reg = max8907_rtc_is_precious_reg,
|
|
.writeable_reg = max8907_rtc_is_writeable_reg,
|
|
.max_register = MAX8907_REG_MPL_CNTL,
|
|
.cache_type = REGCACHE_RBTREE,
|
|
};
|
|
|
|
static const struct regmap_irq max8907_chg_irqs[] = {
|
|
{ .reg_offset = 0, .mask = 1 << 0, },
|
|
{ .reg_offset = 0, .mask = 1 << 1, },
|
|
{ .reg_offset = 0, .mask = 1 << 2, },
|
|
{ .reg_offset = 1, .mask = 1 << 0, },
|
|
{ .reg_offset = 1, .mask = 1 << 1, },
|
|
{ .reg_offset = 1, .mask = 1 << 2, },
|
|
{ .reg_offset = 1, .mask = 1 << 3, },
|
|
{ .reg_offset = 1, .mask = 1 << 4, },
|
|
{ .reg_offset = 1, .mask = 1 << 5, },
|
|
{ .reg_offset = 1, .mask = 1 << 6, },
|
|
{ .reg_offset = 1, .mask = 1 << 7, },
|
|
};
|
|
|
|
static const struct regmap_irq_chip max8907_chg_irq_chip = {
|
|
.name = "max8907 chg",
|
|
.status_base = MAX8907_REG_CHG_IRQ1,
|
|
.mask_base = MAX8907_REG_CHG_IRQ1_MASK,
|
|
.wake_base = MAX8907_REG_CHG_IRQ1_MASK,
|
|
.irq_reg_stride = MAX8907_REG_CHG_IRQ2 - MAX8907_REG_CHG_IRQ1,
|
|
.num_regs = 2,
|
|
.irqs = max8907_chg_irqs,
|
|
.num_irqs = ARRAY_SIZE(max8907_chg_irqs),
|
|
};
|
|
|
|
static const struct regmap_irq max8907_on_off_irqs[] = {
|
|
{ .reg_offset = 0, .mask = 1 << 0, },
|
|
{ .reg_offset = 0, .mask = 1 << 1, },
|
|
{ .reg_offset = 0, .mask = 1 << 2, },
|
|
{ .reg_offset = 0, .mask = 1 << 3, },
|
|
{ .reg_offset = 0, .mask = 1 << 4, },
|
|
{ .reg_offset = 0, .mask = 1 << 5, },
|
|
{ .reg_offset = 0, .mask = 1 << 6, },
|
|
{ .reg_offset = 0, .mask = 1 << 7, },
|
|
{ .reg_offset = 1, .mask = 1 << 0, },
|
|
{ .reg_offset = 1, .mask = 1 << 1, },
|
|
};
|
|
|
|
static const struct regmap_irq_chip max8907_on_off_irq_chip = {
|
|
.name = "max8907 on_off",
|
|
.status_base = MAX8907_REG_ON_OFF_IRQ1,
|
|
.mask_base = MAX8907_REG_ON_OFF_IRQ1_MASK,
|
|
.irq_reg_stride = MAX8907_REG_ON_OFF_IRQ2 - MAX8907_REG_ON_OFF_IRQ1,
|
|
.num_regs = 2,
|
|
.irqs = max8907_on_off_irqs,
|
|
.num_irqs = ARRAY_SIZE(max8907_on_off_irqs),
|
|
};
|
|
|
|
static const struct regmap_irq max8907_rtc_irqs[] = {
|
|
{ .reg_offset = 0, .mask = 1 << 2, },
|
|
{ .reg_offset = 0, .mask = 1 << 3, },
|
|
};
|
|
|
|
static const struct regmap_irq_chip max8907_rtc_irq_chip = {
|
|
.name = "max8907 rtc",
|
|
.status_base = MAX8907_REG_RTC_IRQ,
|
|
.mask_base = MAX8907_REG_RTC_IRQ_MASK,
|
|
.num_regs = 1,
|
|
.irqs = max8907_rtc_irqs,
|
|
.num_irqs = ARRAY_SIZE(max8907_rtc_irqs),
|
|
};
|
|
|
|
static struct max8907 *max8907_pm_off;
|
|
static void max8907_power_off(void)
|
|
{
|
|
regmap_update_bits(max8907_pm_off->regmap_gen, MAX8907_REG_RESET_CNFG,
|
|
MAX8907_MASK_POWER_OFF, MAX8907_MASK_POWER_OFF);
|
|
}
|
|
|
|
static int max8907_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct max8907 *max8907;
|
|
int ret;
|
|
struct max8907_platform_data *pdata = dev_get_platdata(&i2c->dev);
|
|
bool pm_off = false;
|
|
|
|
if (pdata)
|
|
pm_off = pdata->pm_off;
|
|
else if (i2c->dev.of_node)
|
|
pm_off = of_property_read_bool(i2c->dev.of_node,
|
|
"maxim,system-power-controller");
|
|
|
|
max8907 = devm_kzalloc(&i2c->dev, sizeof(struct max8907), GFP_KERNEL);
|
|
if (!max8907) {
|
|
ret = -ENOMEM;
|
|
goto err_alloc_drvdata;
|
|
}
|
|
|
|
max8907->dev = &i2c->dev;
|
|
dev_set_drvdata(max8907->dev, max8907);
|
|
|
|
max8907->i2c_gen = i2c;
|
|
i2c_set_clientdata(i2c, max8907);
|
|
max8907->regmap_gen = devm_regmap_init_i2c(i2c,
|
|
&max8907_regmap_gen_config);
|
|
if (IS_ERR(max8907->regmap_gen)) {
|
|
ret = PTR_ERR(max8907->regmap_gen);
|
|
dev_err(&i2c->dev, "gen regmap init failed: %d\n", ret);
|
|
goto err_regmap_gen;
|
|
}
|
|
|
|
max8907->i2c_rtc = i2c_new_dummy(i2c->adapter, MAX8907_RTC_I2C_ADDR);
|
|
if (!max8907->i2c_rtc) {
|
|
ret = -ENOMEM;
|
|
goto err_dummy_rtc;
|
|
}
|
|
i2c_set_clientdata(max8907->i2c_rtc, max8907);
|
|
max8907->regmap_rtc = devm_regmap_init_i2c(max8907->i2c_rtc,
|
|
&max8907_regmap_rtc_config);
|
|
if (IS_ERR(max8907->regmap_rtc)) {
|
|
ret = PTR_ERR(max8907->regmap_rtc);
|
|
dev_err(&i2c->dev, "rtc regmap init failed: %d\n", ret);
|
|
goto err_regmap_rtc;
|
|
}
|
|
|
|
irq_set_status_flags(max8907->i2c_gen->irq, IRQ_NOAUTOEN);
|
|
|
|
ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,
|
|
IRQF_ONESHOT | IRQF_SHARED, -1,
|
|
&max8907_chg_irq_chip,
|
|
&max8907->irqc_chg);
|
|
if (ret != 0) {
|
|
dev_err(&i2c->dev, "failed to add chg irq chip: %d\n", ret);
|
|
goto err_irqc_chg;
|
|
}
|
|
ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,
|
|
IRQF_ONESHOT | IRQF_SHARED, -1,
|
|
&max8907_on_off_irq_chip,
|
|
&max8907->irqc_on_off);
|
|
if (ret != 0) {
|
|
dev_err(&i2c->dev, "failed to add on off irq chip: %d\n", ret);
|
|
goto err_irqc_on_off;
|
|
}
|
|
ret = regmap_add_irq_chip(max8907->regmap_rtc, max8907->i2c_gen->irq,
|
|
IRQF_ONESHOT | IRQF_SHARED, -1,
|
|
&max8907_rtc_irq_chip,
|
|
&max8907->irqc_rtc);
|
|
if (ret != 0) {
|
|
dev_err(&i2c->dev, "failed to add rtc irq chip: %d\n", ret);
|
|
goto err_irqc_rtc;
|
|
}
|
|
|
|
enable_irq(max8907->i2c_gen->irq);
|
|
|
|
ret = mfd_add_devices(max8907->dev, -1, max8907_cells,
|
|
ARRAY_SIZE(max8907_cells), NULL, 0, NULL);
|
|
if (ret != 0) {
|
|
dev_err(&i2c->dev, "failed to add MFD devices %d\n", ret);
|
|
goto err_add_devices;
|
|
}
|
|
|
|
if (pm_off && !pm_power_off) {
|
|
max8907_pm_off = max8907;
|
|
pm_power_off = max8907_power_off;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_add_devices:
|
|
regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);
|
|
err_irqc_rtc:
|
|
regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);
|
|
err_irqc_on_off:
|
|
regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);
|
|
err_irqc_chg:
|
|
err_regmap_rtc:
|
|
i2c_unregister_device(max8907->i2c_rtc);
|
|
err_dummy_rtc:
|
|
err_regmap_gen:
|
|
err_alloc_drvdata:
|
|
return ret;
|
|
}
|
|
|
|
static int max8907_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
struct max8907 *max8907 = i2c_get_clientdata(i2c);
|
|
|
|
mfd_remove_devices(max8907->dev);
|
|
|
|
regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);
|
|
regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);
|
|
regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);
|
|
|
|
i2c_unregister_device(max8907->i2c_rtc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id max8907_of_match[] = {
|
|
{ .compatible = "maxim,max8907" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, max8907_of_match);
|
|
#endif
|
|
|
|
static const struct i2c_device_id max8907_i2c_id[] = {
|
|
{"max8907", 0},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, max8907_i2c_id);
|
|
|
|
static struct i2c_driver max8907_i2c_driver = {
|
|
.driver = {
|
|
.name = "max8907",
|
|
.of_match_table = of_match_ptr(max8907_of_match),
|
|
},
|
|
.probe = max8907_i2c_probe,
|
|
.remove = max8907_i2c_remove,
|
|
.id_table = max8907_i2c_id,
|
|
};
|
|
|
|
static int __init max8907_i2c_init(void)
|
|
{
|
|
int ret = -ENODEV;
|
|
|
|
ret = i2c_add_driver(&max8907_i2c_driver);
|
|
if (ret != 0)
|
|
pr_err("Failed to register I2C driver: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
subsys_initcall(max8907_i2c_init);
|
|
|
|
static void __exit max8907_i2c_exit(void)
|
|
{
|
|
i2c_del_driver(&max8907_i2c_driver);
|
|
}
|
|
module_exit(max8907_i2c_exit);
|
|
|
|
MODULE_DESCRIPTION("MAX8907 multi-function core driver");
|
|
MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");
|
|
MODULE_LICENSE("GPL v2");
|