/*
* 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_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/rtc.h>
#include <linux/regmap.h>
static struct mfd_cell s5m8751_devs[] = {
{
.name = "s5m8751-pmic",
}, {
.name = "s5m-charger",
}, {
.name = "s5m8751-codec",
},
};
static struct mfd_cell s5m8763_devs[] = {
{
.name = "s5m8763-pmic",
}, {
.name = "s5m-rtc",
}, {
.name = "s5m-charger",
},
};
static struct mfd_cell s5m8767_devs[] = {
{
.name = "s5m8767-pmic",
}, {
.name = "s5m-rtc",
},
};
static struct mfd_cell s2mps11_devs[] = {
{
.name = "s2mps11-pmic",
},
};
#ifdef CONFIG_OF
static struct of_device_id sec_dt_match[] = {
{ .compatible = "samsung,s5m8767-pmic",
.data = (void *)S5M8767X,
},
{},
};
#endif
int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest)
{
return regmap_read(sec_pmic->regmap, reg, dest);
}
EXPORT_SYMBOL_GPL(sec_reg_read);
int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
{
return regmap_bulk_read(sec_pmic->regmap, reg, buf, count);
}
EXPORT_SYMBOL_GPL(sec_bulk_read);
int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value)
{
return regmap_write(sec_pmic->regmap, reg, value);
}
EXPORT_SYMBOL_GPL(sec_reg_write);
int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
{
return regmap_raw_write(sec_pmic->regmap, reg, buf, count);
}
EXPORT_SYMBOL_GPL(sec_bulk_write);
int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask)
{
return regmap_update_bits(sec_pmic->regmap, reg, mask, val);
}
EXPORT_SYMBOL_GPL(sec_reg_update);
static struct regmap_config sec_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
#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 0;
}
#endif
static inline int 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 (int)match->data;
}
#endif
return (int)id->driver_data;
}
static int sec_pmic_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct sec_platform_data *pdata = i2c->dev.platform_data;
struct sec_pmic_dev *sec_pmic;
int ret;
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;
sec_pmic->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 = sec_pmic->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;
}
sec_pmic->regmap = devm_regmap_init_i2c(i2c, &sec_regmap_config);
if (IS_ERR(sec_pmic->regmap)) {
ret = PTR_ERR(sec_pmic->regmap);
dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
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:
ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL);
break;
case S5M8763X:
ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL);
break;
case S5M8767X:
ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL);
break;
case S2MPS11X:
ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs,
ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL);
break;
default:
/* If this happens the probe function is problem */
BUG();
}
if (ret < 0)
goto err;
return ret;
err:
mfd_remove_devices(sec_pmic->dev);
sec_irq_exit(sec_pmic);
i2c_unregister_device(sec_pmic->rtc);
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);
i2c_unregister_device(sec_pmic->rtc);
return 0;
}
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,
.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");