diff options
Diffstat (limited to 'drivers/mfd/lm3632.c')
| -rwxr-xr-x | drivers/mfd/lm3632.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/drivers/mfd/lm3632.c b/drivers/mfd/lm3632.c new file mode 100755 index 00000000..4bf7ebe3 --- /dev/null +++ b/drivers/mfd/lm3632.c @@ -0,0 +1,198 @@ +/* + * 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"); |