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/*
* TI LM3632 MFD Driver
*
* Copyright 2015 Texas Instruments
*
* Author: Milo Kim <milo.kim@ti.com>
*
* 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/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/lm3632.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#define LM3632_DEV_LCD_BIAS(_id) \
{ \
.name = "lm3632-regulator", \
.id = _id, \
.of_compatible = "ti,lm3632-regulator", \
}
#define LM3632_DEV_BL \
{ \
.name = "lm3632-backlight", \
.of_compatible = "ti,lm3632-backlight", \
}
#define LM3632_DEV_FLASH \
{ \
.name = "lm3632-flash", \
.of_compatible = "ti,lm3632-flash", \
}
static struct mfd_cell lm3632_devs[] = {
/* 3 Regulators */
LM3632_DEV_LCD_BIAS(1),
LM3632_DEV_LCD_BIAS(2),
LM3632_DEV_LCD_BIAS(3),
/* Backlight */
LM3632_DEV_BL,
/* Torch Flash */
LM3632_DEV_FLASH,
};
int lm3632_read_byte(struct lm3632 *lm3632, u8 reg, u8 *read)
{
int ret;
unsigned int val;
ret = regmap_read(lm3632->regmap, reg, &val);
if (ret < 0)
return ret;
*read = (u8)val;
return 0;
}
EXPORT_SYMBOL_GPL(lm3632_read_byte);
int lm3632_write_byte(struct lm3632 *lm3632, u8 reg, u8 data)
{
return regmap_write(lm3632->regmap, reg, data);
}
EXPORT_SYMBOL_GPL(lm3632_write_byte);
int lm3632_update_bits(struct lm3632 *lm3632, u8 reg, u8 mask, u8 data)
{
return regmap_update_bits(lm3632->regmap, reg, mask, data);
}
EXPORT_SYMBOL_GPL(lm3632_update_bits);
static int lm3632_init_device(struct lm3632 *lm3632)
{
return devm_gpio_request_one(lm3632->dev, lm3632->pdata->en_gpio,
GPIOF_OUT_INIT_HIGH, "lm3632_hwen");
}
static void lm3632_deinit_device(struct lm3632 *lm3632)
{
gpio_set_value(lm3632->pdata->en_gpio, 0);
}
static int lm3632_parse_dt(struct device *dev, struct lm3632 *lm3632)
{
//struct device_node *node = dev->of_node;
struct lm3632_platform_data *pdata;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
//pdata->en_gpio = of_get_named_gpio(node, "ti,en-gpio", 0);
pdata->en_gpio=0;
if (pdata->en_gpio == -EPROBE_DEFER)
return -EPROBE_DEFER;
lm3632->pdata = pdata;
return 0;
}
static struct regmap_config lm3632_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = LM3632_MAX_REGISTERS,
};
static int lm3632_probe(struct i2c_client *cl, const struct i2c_device_id *id)
{
struct lm3632 *lm3632;
struct device *dev = &cl->dev;
struct lm3632_platform_data *pdata = dev_get_platdata(dev);
int ret;
printk("zyun lm3632_probe\n");
if (!i2c_check_functionality(cl->adapter, I2C_FUNC_I2C)) {
printk("zyun i2c functionality check fail.\n");
return -EOPNOTSUPP;
}
lm3632 = devm_kzalloc(dev, sizeof(*lm3632), GFP_KERNEL);
if (!lm3632)
return -ENOMEM;
lm3632->pdata = pdata;
if (!pdata) {
if (IS_ENABLED(CONFIG_OF))
ret = lm3632_parse_dt(dev, lm3632);
}
lm3632->regmap = devm_regmap_init_i2c(cl, &lm3632_regmap_config);
if (IS_ERR(lm3632->regmap))
return PTR_ERR(lm3632->regmap);
lm3632->dev = &cl->dev;
i2c_set_clientdata(cl, lm3632);
ret = lm3632_init_device(lm3632);
if (ret)
return ret;
//printk("~~~~ %s %d\n", __FUNCTION__, __LINE__);
printk("zyun original lm3632 adress=0x%x\n",(int)lm3632);
return mfd_add_devices(dev, -1, lm3632_devs, ARRAY_SIZE(lm3632_devs),
NULL, 0, NULL);
}
static int lm3632_remove(struct i2c_client *cl)
{
struct lm3632 *lm3632 = i2c_get_clientdata(cl);
lm3632_deinit_device(lm3632);
mfd_remove_devices(lm3632->dev);
return 0;
}
static const struct i2c_device_id lm3632_ids[] = {
{ "lm3632", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm3632_ids);
#ifdef CONFIG_OF
static const struct of_device_id lm3632_of_match[] = {
{ .compatible = "ti,lm3632", },
{ }
};
MODULE_DEVICE_TABLE(of, lm3632_of_match);
#endif
static struct i2c_driver lm3632_driver = {
.probe = lm3632_probe,
.remove = lm3632_remove,
.driver = {
.name = "lm3632",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(lm3632_of_match),
},
.id_table = lm3632_ids,
};
module_i2c_driver(lm3632_driver);
MODULE_DESCRIPTION("TI LM3632 MFD Core");
MODULE_AUTHOR("Milo Kim");
MODULE_LICENSE("GPL");
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