From: "G.Shark Jeong" <[email protected]> LM3554 : The LM3554 is a 2 MHz fixed-frequency synchronous boost converter with 1.2A dual high side led drivers. Datasheet: www.ti.com
Signed-off-by: G.Shark Jeong <[email protected]> --- drivers/leds/Kconfig | 8 + drivers/leds/Makefile | 1 + drivers/leds/leds-lm3554.c | 324 +++++++++++++++++++++++++++++ include/linux/platform_data/leds-lm3554.h | 66 ++++++ 4 files changed, 399 insertions(+), 0 deletions(-) create mode 100644 drivers/leds/leds-lm3554.c create mode 100644 include/linux/platform_data/leds-lm3554.h diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 12b2b55..ad54bc2 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -415,6 +415,14 @@ config LEDS_MAX8997 This option enables support for on-chip LED drivers on MAXIM MAX8997 PMIC. +config LEDS_LM3554 + tristate "LED support for LM3554" + depends on LEDS_CLASS && I2C + select REGMAP_I2C + help + This option enables support for LEDs connected to LM3554. + LM3554 includes Torch, Flash and Indicator functions. + config LEDS_OT200 tristate "LED support for the Bachmann OT200" depends on LEDS_CLASS && HAS_IOMEM diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index f8958cd..19903ed 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -47,6 +47,7 @@ obj-$(CONFIG_LEDS_NETXBIG) += leds-netxbig.o obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o obj-$(CONFIG_LEDS_RENESAS_TPU) += leds-renesas-tpu.o obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o +obj-$(CONFIG_LEDS_LM3554) += leds-lm3554.o # LED SPI Drivers obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o diff --git a/drivers/leds/leds-lm3554.c b/drivers/leds/leds-lm3554.c new file mode 100644 index 0000000..4f53086 --- /dev/null +++ b/drivers/leds/leds-lm3554.c @@ -0,0 +1,324 @@ +/* +* Simple driver for Texas Instruments LM3554 LED Flash driver chip +* Copyright (C) 2012 Texas Instruments +* +* 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/module.h> +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/gpio.h> +#include <linux/leds.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/fs.h> +#include <linux/regmap.h> +#include <linux/platform_data/leds-lm3554.h> + +#define REG_TORCH (0xA0) +#define REG_FLASH (0xB0) +#define REG_FLASH_TIME (0xC0) +#define REG_FLAG (0xD0) +#define REG_CONF1 (0xE0) +#define REG_CONF2 (0xF0) +#define REG_GPIO (0x20) +#define REG_VIN_MON (0x80) +#define REG_MAX REG_VIN_MON + +enum lm3554_mode { + MODE_SHDN = 0, + MODE_INDIC, + MODE_TORCH, + MODE_FLASH, + MODE_VOUT, + MODE_VOUT_INDIC, + MODE_VOUT_TORCH, + MODE_VOUT_FLASH, +}; + +struct lm3554_chip_data { + struct device *dev; + + struct led_classdev cdev_flash; + struct led_classdev cdev_torch; + struct led_classdev cdev_indicator; + + struct lm3554_platform_data *pdata; + + struct mutex lock; + struct regmap *regmap; + unsigned int last_flag; +}; + +/* chip initialize */ +static int __devinit lm3554_chip_init(struct lm3554_chip_data *chip) +{ + int ret; + unsigned int reg_val; + struct lm3554_platform_data *pdata = chip->pdata; + + /* input and output pins configuration */ + reg_val = pdata->pin_strobe | pdata->pin_tx1 + | pdata->pin_tx2 | pdata->ledi_pin; + ret = regmap_update_bits(chip->regmap, REG_CONF1, 0xAC, reg_val); + if (ret < 0) + goto out; + + return ret; +out: + dev_err(chip->dev, "%s:i2c access fail to register\n", __func__); + return ret; +} + +/* chip control */ +static void lm3554_control(struct lm3554_chip_data *chip, + u8 brightness, enum lm3554_mode opmode) +{ + int ret; + unsigned int reg_val; + struct lm3554_platform_data *pdata = chip->pdata; + + ret = regmap_read(chip->regmap, REG_FLAG, &chip->last_flag); + if (ret < 0) + goto out; + if (chip->last_flag) + dev_info(chip->dev, "LM3554 Last FLAG is 0x%x\n", + chip->last_flag); + /* brightness 0 means shutdown */ + if (!brightness) + opmode = MODE_SHDN; + + switch (opmode) { + case MODE_TORCH: + if (pdata->pin_tx1 == LM3554_TX1_HW_TORCH) { + ret = regmap_update_bits(chip->regmap, + REG_CONF1, 0x80, 0x80); + if (ret < 0) + goto out; + opmode = MODE_SHDN; + } + ret = regmap_update_bits(chip->regmap, + REG_TORCH, 0x38, + (brightness - 1) << 3); + if (ret < 0) + goto out; + break; + + case MODE_FLASH: + if (pdata->pin_strobe == LM3554_STROBE_EN) { + ret = regmap_update_bits(chip->regmap, + REG_CONF1, 0x84, 0x04); + if (ret < 0) + goto out; + opmode = MODE_SHDN; + } + ret = regmap_update_bits(chip->regmap, REG_FLASH, 0x78, + (brightness - 1) << 3); + if (ret < 0) + goto out; + break; + + case MODE_INDIC: + if (pdata->ledi_pin == LM3554_LEDI_INDICATOR) { + ret = regmap_update_bits(chip->regmap, + REG_CONF1, 0x08, 0x08); + if (ret < 0) + goto out; + opmode = MODE_SHDN; + } + ret = regmap_update_bits(chip->regmap, REG_TORCH, 0x38, + (brightness - 1) << 3); + if (ret < 0) + goto out; + break; + case MODE_SHDN: + break; + default: + return; + } + + /* set voltage out mode */ + reg_val = opmode | pdata->vout_mode; + ret = regmap_update_bits(chip->regmap, REG_TORCH, 0x07, reg_val); + if (ret < 0) + goto out; + return; +out: + dev_err(chip->dev, "%s:i2c access fail to register\n", __func__); + return; +} + +/* torch */ +static void lm3554_torch_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct lm3554_chip_data *chip = + container_of(cdev, struct lm3554_chip_data, cdev_torch); + + mutex_lock(&chip->lock); + lm3554_control(chip, brightness, MODE_TORCH); + mutex_unlock(&chip->lock); + return; +} + +/* flash */ +static void lm3554_strobe_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct lm3554_chip_data *chip = + container_of(cdev, struct lm3554_chip_data, cdev_flash); + + mutex_lock(&chip->lock); + lm3554_control(chip, brightness, MODE_FLASH); + mutex_unlock(&chip->lock); + return; +} + +/* indicator */ +static void lm3554_indicator_brightness_set(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct lm3554_chip_data *chip = + container_of(cdev, struct lm3554_chip_data, cdev_indicator); + + mutex_lock(&chip->lock); + lm3554_control(chip, brightness, MODE_INDIC); + mutex_unlock(&chip->lock); + return; +} + +static const struct regmap_config lm3554_regmap = { + .reg_bits = 8, + .val_bits = 8, + .max_register = REG_MAX, +}; + +/* module initialize */ +static int __devinit lm3554_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct lm3554_chip_data *chip; + struct lm3554_platform_data *pdata = client->dev.platform_data; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + dev_err(&client->dev, "i2c functionality check fail.\n"); + return -EOPNOTSUPP; + } + + if (pdata == NULL) { + dev_err(&client->dev, "Needs Platform Data.\n"); + return -ENODATA; + } + + chip = + devm_kzalloc(&client->dev, sizeof(struct lm3554_chip_data), + GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->dev = &client->dev; + chip->pdata = pdata; + + chip->regmap = /*devm_ */ regmap_init_i2c(client, &lm3554_regmap); + if (IS_ERR(chip->regmap)) { + ret = PTR_ERR(chip->regmap); + dev_err(&client->dev, + "Failed to allocate register map: %d\n", ret); + return ret; + } + + mutex_init(&chip->lock); + i2c_set_clientdata(client, chip); + + ret = lm3554_chip_init(chip); + if (ret < 0) + goto err_chip_init; + + /* flash */ + chip->cdev_flash.name = "flash"; + chip->cdev_flash.max_brightness = 16; + chip->cdev_flash.brightness_set = lm3554_strobe_brightness_set; + ret = led_classdev_register((struct device *) + &client->dev, &chip->cdev_flash); + if (ret < 0) + goto err_chip_init; + /* torch */ + chip->cdev_torch.name = "torch"; + chip->cdev_torch.max_brightness = 8; + chip->cdev_torch.brightness_set = lm3554_torch_brightness_set; + ret = led_classdev_register((struct device *) + &client->dev, &chip->cdev_torch); + if (ret < 0) + goto err_chip_init; + /* indicator */ + chip->cdev_indicator.name = "indicator"; + chip->cdev_indicator.max_brightness = 4; + chip->cdev_indicator.brightness_set = lm3554_indicator_brightness_set; + ret = led_classdev_register((struct device *) + &client->dev, &chip->cdev_indicator); + if (ret < 0) + goto err_chip_init; + + dev_info(chip->dev, "lm3554 initialize OK\n"); + + return 0; + +err_chip_init: + if (&chip->cdev_indicator) + led_classdev_unregister(&chip->cdev_indicator); + if (&chip->cdev_torch) + led_classdev_unregister(&chip->cdev_torch); + if (&chip->cdev_flash) + led_classdev_unregister(&chip->cdev_flash); + + dev_err(chip->dev, "lm3554 initialize fail\n"); + return ret; +} + +static int __devexit lm3554_remove(struct i2c_client *client) +{ + int ret; + struct lm3554_chip_data *chip = i2c_get_clientdata(client); + + if (&chip->cdev_indicator) + led_classdev_unregister(&chip->cdev_indicator); + if (&chip->cdev_torch) + led_classdev_unregister(&chip->cdev_torch); + if (&chip->cdev_flash) + led_classdev_unregister(&chip->cdev_flash); + ret = regmap_write(chip->regmap, REG_TORCH, 0x00); + if (ret < 0) + dev_err(chip->dev, + "%s:i2c access fail to register\n", __func__); + dev_info(chip->dev, "lm3554 is removed"); + return 0; +} + +static const struct i2c_device_id lm3554_id[] = { + {LM3554_NAME, 0}, + {} +}; + +MODULE_DEVICE_TABLE(i2c, lm3554_id); + +static struct i2c_driver lm3554_i2c_driver = { + .driver = { + .name = LM3554_NAME, + .owner = THIS_MODULE, + .pm = NULL, + }, + .probe = lm3554_probe, + .remove = __devexit_p(lm3554_remove), + .id_table = lm3554_id, +}; + +module_i2c_driver(lm3554_i2c_driver); + +MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3554"); +MODULE_AUTHOR("Daniel Jeong <[email protected]>"); +MODULE_AUTHOR("G.Shark Jeong <[email protected]>"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/platform_data/leds-lm3554.h b/include/linux/platform_data/leds-lm3554.h new file mode 100644 index 0000000..883cfbd --- /dev/null +++ b/include/linux/platform_data/leds-lm3554.h @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2012 Texas Instruments + * + * License Terms: GNU General Public License v2 + * + * Simple driver for Texas Instruments LM3554 LED driver chip + * + * Author: Daniel Jeong <[email protected]> + * G.Shark Jeong <[email protected]> + */ + +#ifndef _LINUX_LED_FLASH_LM3554_H__ +#define _LINUX_LED_FLASH_LM3554_H__ + +#define LM3554_NAME "leds-lm3554" + +/* input pin configuration */ +enum lm3554_strobe { + LM3554_STROBE_DISABLE = 0x04, + LM3554_STROBE_EN = 0x00, +}; + +/* input pin configuration */ +enum lm3554_tx1 { + LM3554_TX1_FL_INT = 0x00, + LM3554_TX1_HW_TORCH = 0x80, + LM3554_TX1_GPIO = 0x10, +}; + +/* input pin configuration */ +enum lm3554_tx2 { + LM3554_TX2_EMVM = 0x00, + LM3554_TX2_PAM_SYNC = 0x20, + LM3554_TX2_GPIO = 0x10, +}; + +/* output pin configuration */ +enum lm3554_ledi { + LM3554_LEDI_INDICATOR = 0x00, + LM3554_LEDI_THERMAL_COMP = 0x08, +}; + +enum lm3554_vout { + LM3554_VOUTMODE_DISABLE = 0x00, + LM3554_VOUTMODE_ENABLE = 0x04, +}; + +/** + * struct lm3554_platform_data + * @strobe : strobe input enable + * @pin_tx1 : input pin tx1/torch/gpio1 + * @pin_tx2 : input pin envm/tx2/gpio2 + * @ledi_pin : output pin ledi/ntc + * @vout_mode : voltage out mode + */ +struct lm3554_platform_data { + enum lm3554_strobe pin_strobe; + + enum lm3554_tx1 pin_tx1; + enum lm3554_tx2 pin_tx2; + + enum lm3554_ledi ledi_pin; + enum lm3554_vout vout_mode; +}; + +#endif /* _LINUX_LED_FLASH_LM3554_H__ */ -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
