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alistair23-linux/drivers/mfd/sec-core.c
Javier Martinez Canillas 6ce286f182 Revert "mfd: sec-core: Prepare regulators for suspend state to reduce power-consumption" 
This reverts commit b7cde7078d
("mfd: sec-core: Prepare regulators for suspend state to reduce power-consumption")

Commit b7cde7078d called regulator_suspend_prepare() to prepare the
regulators for a suspend state. But it did from the device pm suspend
handler while the regulator suspend prepare function iterates over all
regulators and not only the one managed by this device so it doesn't
seems to be correct to call it from within a device driver.

It is better to call the regulator suspend prepare/finish functions
from platform code instead so this patch reverts the mentioned commit.

Suggested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-11-25 16:18:47 +00:00

515 lines
11 KiB
C
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/*
* sec-core.c
*
* Copyright (c) 2012 Samsung Electronics Co., Ltd
* http://www.samsung.com
*
* 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/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/mfd/samsung/core.h>
#include <linux/mfd/samsung/irq.h>
#include <linux/mfd/samsung/s2mpa01.h>
#include <linux/mfd/samsung/s2mps11.h>
#include <linux/mfd/samsung/s2mps13.h>
#include <linux/mfd/samsung/s2mps14.h>
#include <linux/mfd/samsung/s2mpu02.h>
#include <linux/mfd/samsung/s5m8763.h>
#include <linux/mfd/samsung/s5m8767.h>
#include <linux/regmap.h>
static const struct mfd_cell s5m8751_devs[] = {
{
.name = "s5m8751-pmic",
}, {
.name = "s5m-charger",
}, {
.name = "s5m8751-codec",
},
};
static const struct mfd_cell s5m8763_devs[] = {
{
.name = "s5m8763-pmic",
}, {
.name = "s5m-rtc",
}, {
.name = "s5m-charger",
},
};
static const struct mfd_cell s5m8767_devs[] = {
{
.name = "s5m8767-pmic",
}, {
.name = "s5m-rtc",
}, {
.name = "s5m8767-clk",
.of_compatible = "samsung,s5m8767-clk",
}
};
static const struct mfd_cell s2mps11_devs[] = {
{
.name = "s2mps11-pmic",
}, {
.name = "s2mps11-clk",
.of_compatible = "samsung,s2mps11-clk",
}
};
static const struct mfd_cell s2mps13_devs[] = {
{ .name = "s2mps13-pmic", },
{ .name = "s2mps13-rtc", },
{
.name = "s2mps13-clk",
.of_compatible = "samsung,s2mps13-clk",
},
};
static const struct mfd_cell s2mps14_devs[] = {
{
.name = "s2mps14-pmic",
}, {
.name = "s2mps14-rtc",
}, {
.name = "s2mps14-clk",
.of_compatible = "samsung,s2mps14-clk",
}
};
static const struct mfd_cell s2mpa01_devs[] = {
{
.name = "s2mpa01-pmic",
},
};
static const struct mfd_cell s2mpu02_devs[] = {
{ .name = "s2mpu02-pmic", },
{ .name = "s2mpu02-rtc", },
{
.name = "s2mpu02-clk",
.of_compatible = "samsung,s2mpu02-clk",
}
};
#ifdef CONFIG_OF
static const struct of_device_id sec_dt_match[] = {
{ .compatible = "samsung,s5m8767-pmic",
.data = (void *)S5M8767X,
}, {
.compatible = "samsung,s2mps11-pmic",
.data = (void *)S2MPS11X,
}, {
.compatible = "samsung,s2mps13-pmic",
.data = (void *)S2MPS13X,
}, {
.compatible = "samsung,s2mps14-pmic",
.data = (void *)S2MPS14X,
}, {
.compatible = "samsung,s2mpa01-pmic",
.data = (void *)S2MPA01,
}, {
.compatible = "samsung,s2mpu02-pmic",
.data = (void *)S2MPU02,
}, {
/* Sentinel */
},
};
#endif
static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case S2MPA01_REG_INT1M:
case S2MPA01_REG_INT2M:
case S2MPA01_REG_INT3M:
return false;
default:
return true;
}
}
static bool s2mps11_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case S2MPS11_REG_INT1M:
case S2MPS11_REG_INT2M:
case S2MPS11_REG_INT3M:
return false;
default:
return true;
}
}
static bool s2mpu02_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case S2MPU02_REG_INT1M:
case S2MPU02_REG_INT2M:
case S2MPU02_REG_INT3M:
return false;
default:
return true;
}
}
static bool s5m8763_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case S5M8763_REG_IRQM1:
case S5M8763_REG_IRQM2:
case S5M8763_REG_IRQM3:
case S5M8763_REG_IRQM4:
return false;
default:
return true;
}
}
static const struct regmap_config sec_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static const struct regmap_config s2mpa01_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = S2MPA01_REG_LDO_OVCB4,
.volatile_reg = s2mpa01_volatile,
.cache_type = REGCACHE_FLAT,
};
static const struct regmap_config s2mps11_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = S2MPS11_REG_L38CTRL,
.volatile_reg = s2mps11_volatile,
.cache_type = REGCACHE_FLAT,
};
static const struct regmap_config s2mps13_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = S2MPS13_REG_LDODSCH5,
.volatile_reg = s2mps11_volatile,
.cache_type = REGCACHE_FLAT,
};
static const struct regmap_config s2mps14_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = S2MPS14_REG_LDODSCH3,
.volatile_reg = s2mps11_volatile,
.cache_type = REGCACHE_FLAT,
};
static const struct regmap_config s2mpu02_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = S2MPU02_REG_DVSDATA,
.volatile_reg = s2mpu02_volatile,
.cache_type = REGCACHE_FLAT,
};
static const struct regmap_config s5m8763_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = S5M8763_REG_LBCNFG2,
.volatile_reg = s5m8763_volatile,
.cache_type = REGCACHE_FLAT,
};
static const struct regmap_config s5m8767_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = S5M8767_REG_LDO28CTRL,
.volatile_reg = s2mps11_volatile,
.cache_type = REGCACHE_FLAT,
};
#ifdef CONFIG_OF
/*
* Only the common platform data elements for s5m8767 are parsed here from the
* device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
* others have to parse their own platform data elements from device tree.
*
* The s5m8767 platform data structure is instantiated here and the drivers for
* the sub-modules need not instantiate another instance while parsing their
* platform data.
*/
static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
struct device *dev)
{
struct sec_platform_data *pd;
pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
if (!pd) {
dev_err(dev, "could not allocate memory for pdata\n");
return ERR_PTR(-ENOMEM);
}
/*
* ToDo: the 'wakeup' member in the platform data is more of a linux
* specfic information. Hence, there is no binding for that yet and
* not parsed here.
*/
return pd;
}
#else
static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
struct device *dev)
{
return NULL;
}
#endif
static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
#ifdef CONFIG_OF
if (i2c->dev.of_node) {
const struct of_device_id *match;
match = of_match_node(sec_dt_match, i2c->dev.of_node);
return (unsigned long)match->data;
}
#endif
return id->driver_data;
}
static int sec_pmic_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
const struct regmap_config *regmap;
const struct mfd_cell *sec_devs;
struct sec_pmic_dev *sec_pmic;
unsigned long device_type;
int ret, num_sec_devs;
sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
GFP_KERNEL);
if (sec_pmic == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, sec_pmic);
sec_pmic->dev = &i2c->dev;
sec_pmic->i2c = i2c;
sec_pmic->irq = i2c->irq;
device_type = sec_i2c_get_driver_data(i2c, id);
if (sec_pmic->dev->of_node) {
pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
if (IS_ERR(pdata)) {
ret = PTR_ERR(pdata);
return ret;
}
pdata->device_type = device_type;
}
if (pdata) {
sec_pmic->device_type = pdata->device_type;
sec_pmic->ono = pdata->ono;
sec_pmic->irq_base = pdata->irq_base;
sec_pmic->wakeup = pdata->wakeup;
sec_pmic->pdata = pdata;
}
switch (sec_pmic->device_type) {
case S2MPA01:
regmap = &s2mpa01_regmap_config;
break;
case S2MPS11X:
regmap = &s2mps11_regmap_config;
break;
case S2MPS13X:
regmap = &s2mps13_regmap_config;
break;
case S2MPS14X:
regmap = &s2mps14_regmap_config;
break;
case S5M8763X:
regmap = &s5m8763_regmap_config;
break;
case S5M8767X:
regmap = &s5m8767_regmap_config;
break;
case S2MPU02:
regmap = &s2mpu02_regmap_config;
break;
default:
regmap = &sec_regmap_config;
break;
}
sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
if (IS_ERR(sec_pmic->regmap_pmic)) {
ret = PTR_ERR(sec_pmic->regmap_pmic);
dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
if (pdata && pdata->cfg_pmic_irq)
pdata->cfg_pmic_irq();
sec_irq_init(sec_pmic);
pm_runtime_set_active(sec_pmic->dev);
switch (sec_pmic->device_type) {
case S5M8751X:
sec_devs = s5m8751_devs;
num_sec_devs = ARRAY_SIZE(s5m8751_devs);
break;
case S5M8763X:
sec_devs = s5m8763_devs;
num_sec_devs = ARRAY_SIZE(s5m8763_devs);
break;
case S5M8767X:
sec_devs = s5m8767_devs;
num_sec_devs = ARRAY_SIZE(s5m8767_devs);
break;
case S2MPA01:
sec_devs = s2mpa01_devs;
num_sec_devs = ARRAY_SIZE(s2mpa01_devs);
break;
case S2MPS11X:
sec_devs = s2mps11_devs;
num_sec_devs = ARRAY_SIZE(s2mps11_devs);
break;
case S2MPS13X:
sec_devs = s2mps13_devs;
num_sec_devs = ARRAY_SIZE(s2mps13_devs);
break;
case S2MPS14X:
sec_devs = s2mps14_devs;
num_sec_devs = ARRAY_SIZE(s2mps14_devs);
break;
case S2MPU02:
sec_devs = s2mpu02_devs;
num_sec_devs = ARRAY_SIZE(s2mpu02_devs);
break;
default:
/* If this happens the probe function is problem */
BUG();
}
ret = mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs, NULL,
0, NULL);
if (ret)
goto err_mfd;
device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
return ret;
err_mfd:
sec_irq_exit(sec_pmic);
return ret;
}
static int sec_pmic_remove(struct i2c_client *i2c)
{
struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
mfd_remove_devices(sec_pmic->dev);
sec_irq_exit(sec_pmic);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int sec_pmic_suspend(struct device *dev)
{
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
if (device_may_wakeup(dev))
enable_irq_wake(sec_pmic->irq);
/*
* PMIC IRQ must be disabled during suspend for RTC alarm
* to work properly.
* When device is woken up from suspend, an
* interrupt occurs before resuming I2C bus controller.
* The interrupt is handled by regmap_irq_thread which tries
* to read RTC registers. This read fails (I2C is still
* suspended) and RTC Alarm interrupt is disabled.
*/
disable_irq(sec_pmic->irq);
return 0;
}
static int sec_pmic_resume(struct device *dev)
{
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
if (device_may_wakeup(dev))
disable_irq_wake(sec_pmic->irq);
enable_irq(sec_pmic->irq);
return 0;
}
#endif /* CONFIG_PM_SLEEP */
static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
static const struct i2c_device_id sec_pmic_id[] = {
{ "sec_pmic", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
static struct i2c_driver sec_pmic_driver = {
.driver = {
.name = "sec_pmic",
.owner = THIS_MODULE,
.pm = &sec_pmic_pm_ops,
.of_match_table = of_match_ptr(sec_dt_match),
},
.probe = sec_pmic_probe,
.remove = sec_pmic_remove,
.id_table = sec_pmic_id,
};
static int __init sec_pmic_init(void)
{
return i2c_add_driver(&sec_pmic_driver);
}
subsys_initcall(sec_pmic_init);
static void __exit sec_pmic_exit(void)
{
i2c_del_driver(&sec_pmic_driver);
}
module_exit(sec_pmic_exit);
MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
MODULE_DESCRIPTION("Core support for the S5M MFD");
MODULE_LICENSE("GPL");
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