[PATCH 1/1 v3] leds: Add new LED driver for lm355x chips

From: G.Shark Jeong
Date: Wed Sep 05 2012 - 03:08:29 EST

From: "G.Shark Jeong" <gshark.jeong@xxxxxxxxx>

This driver is a general version for LM355x,lm3554 and lm3556,led chips of TI.

LM3554 :
The LM3554 is a 2 MHz fixed-frequency synchronous boost
converter with 1.2A dual high side led drivers.
Datasheet: www.ti.com/lit/ds/symlink/lm3554.pdf

LM3556 :
The LM3556 is a 4 MHz fixed-frequency synchronous boost
converter plus 1.5A constant current driver for a high-current white LED.
Datasheet: www.national.com/ds/LM/LM3556.pdf

Signed-off-by: G.Shark Jeong <gshark.jeong@xxxxxxxxx>
---
drivers/leds/Kconfig | 8 +-
drivers/leds/Makefile | 2 +-
drivers/leds/leds-lm3556.c | 512 --------------------------
drivers/leds/leds-lm355x.c | 572 +++++++++++++++++++++++++++++
include/linux/platform_data/leds-lm3556.h | 50 ---
include/linux/platform_data/leds-lm355x.h | 66 ++++
6 files changed, 643 insertions(+), 567 deletions(-)
delete mode 100644 drivers/leds/leds-lm3556.c
create mode 100644 drivers/leds/leds-lm355x.c
delete mode 100644 include/linux/platform_data/leds-lm3556.h
create mode 100644 include/linux/platform_data/leds-lm355x.h

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index c96bbaa..4f6ced2 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -422,13 +422,13 @@ config LEDS_MAX8997
This option enables support for on-chip LED drivers on
MAXIM MAX8997 PMIC.

-config LEDS_LM3556
- tristate "LED support for LM3556 Chip"
+config LEDS_LM355x
+ tristate "LED support for LM355x Chips, LM3554 and LM3556"
depends on LEDS_CLASS && I2C
select REGMAP_I2C
help
- This option enables support for LEDs connected to LM3556.
- LM3556 includes Torch, Flash and Indicator functions.
+ This option enables support for LEDs connected to LM355x.
+ LM355x includes Torch, Flash and Indicator functions.

config LEDS_OT200
tristate "LED support for the Bachmann OT200"
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index a4429a9..b57a021 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -48,7 +48,7 @@ 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-$(CONFIG_LEDS_LM3556) += leds-lm3556.o
+obj-$(CONFIG_LEDS_LM355x) += leds-lm355x.o
obj-$(CONFIG_LEDS_BLINKM) += leds-blinkm.o

# LED SPI Drivers
diff --git a/drivers/leds/leds-lm3556.c b/drivers/leds/leds-lm3556.c
deleted file mode 100644
index 3062abd..0000000
--- a/drivers/leds/leds-lm3556.c
+++ /dev/null
@@ -1,512 +0,0 @@
-/*
- * Simple driver for Texas Instruments LM3556 LED Flash driver chip (Rev0x03)
- * 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.
- *
- * Please refer Documentation/leds/leds-lm3556.txt file.
- */
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/i2c.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-lm3556.h>
-
-#define REG_FILT_TIME (0x0)
-#define REG_IVFM_MODE (0x1)
-#define REG_NTC (0x2)
-#define REG_INDIC_TIME (0x3)
-#define REG_INDIC_BLINK (0x4)
-#define REG_INDIC_PERIOD (0x5)
-#define REG_TORCH_TIME (0x6)
-#define REG_CONF (0x7)
-#define REG_FLASH (0x8)
-#define REG_I_CTRL (0x9)
-#define REG_ENABLE (0xA)
-#define REG_FLAG (0xB)
-#define REG_MAX (0xB)
-
-#define IVFM_FILTER_TIME_SHIFT (3)
-#define UVLO_EN_SHIFT (7)
-#define HYSTERSIS_SHIFT (5)
-#define IVM_D_TH_SHIFT (2)
-#define IVFM_ADJ_MODE_SHIFT (0)
-#define NTC_EVENT_LVL_SHIFT (5)
-#define NTC_TRIP_TH_SHIFT (2)
-#define NTC_BIAS_I_LVL_SHIFT (0)
-#define INDIC_RAMP_UP_TIME_SHIFT (3)
-#define INDIC_RAMP_DN_TIME_SHIFT (0)
-#define INDIC_N_BLANK_SHIFT (4)
-#define INDIC_PULSE_TIME_SHIFT (0)
-#define INDIC_N_PERIOD_SHIFT (0)
-#define TORCH_RAMP_UP_TIME_SHIFT (3)
-#define TORCH_RAMP_DN_TIME_SHIFT (0)
-#define STROBE_USUAGE_SHIFT (7)
-#define STROBE_PIN_POLARITY_SHIFT (6)
-#define TORCH_PIN_POLARITY_SHIFT (5)
-#define TX_PIN_POLARITY_SHIFT (4)
-#define TX_EVENT_LVL_SHIFT (3)
-#define IVFM_EN_SHIFT (2)
-#define NTC_MODE_SHIFT (1)
-#define INDIC_MODE_SHIFT (0)
-#define INDUCTOR_I_LIMIT_SHIFT (6)
-#define FLASH_RAMP_TIME_SHIFT (3)
-#define FLASH_TOUT_TIME_SHIFT (0)
-#define TORCH_I_SHIFT (4)
-#define FLASH_I_SHIFT (0)
-#define NTC_EN_SHIFT (7)
-#define TX_PIN_EN_SHIFT (6)
-#define STROBE_PIN_EN_SHIFT (5)
-#define TORCH_PIN_EN_SHIFT (4)
-#define PRECHG_MODE_EN_SHIFT (3)
-#define PASS_MODE_ONLY_EN_SHIFT (2)
-#define MODE_BITS_SHIFT (0)
-
-#define IVFM_FILTER_TIME_MASK (0x3)
-#define UVLO_EN_MASK (0x1)
-#define HYSTERSIS_MASK (0x3)
-#define IVM_D_TH_MASK (0x7)
-#define IVFM_ADJ_MODE_MASK (0x3)
-#define NTC_EVENT_LVL_MASK (0x1)
-#define NTC_TRIP_TH_MASK (0x7)
-#define NTC_BIAS_I_LVL_MASK (0x3)
-#define INDIC_RAMP_UP_TIME_MASK (0x7)
-#define INDIC_RAMP_DN_TIME_MASK (0x7)
-#define INDIC_N_BLANK_MASK (0x7)
-#define INDIC_PULSE_TIME_MASK (0x7)
-#define INDIC_N_PERIOD_MASK (0x7)
-#define TORCH_RAMP_UP_TIME_MASK (0x7)
-#define TORCH_RAMP_DN_TIME_MASK (0x7)
-#define STROBE_USUAGE_MASK (0x1)
-#define STROBE_PIN_POLARITY_MASK (0x1)
-#define TORCH_PIN_POLARITY_MASK (0x1)
-#define TX_PIN_POLARITY_MASK (0x1)
-#define TX_EVENT_LVL_MASK (0x1)
-#define IVFM_EN_MASK (0x1)
-#define NTC_MODE_MASK (0x1)
-#define INDIC_MODE_MASK (0x1)
-#define INDUCTOR_I_LIMIT_MASK (0x3)
-#define FLASH_RAMP_TIME_MASK (0x7)
-#define FLASH_TOUT_TIME_MASK (0x7)
-#define TORCH_I_MASK (0x7)
-#define FLASH_I_MASK (0xF)
-#define NTC_EN_MASK (0x1)
-#define TX_PIN_EN_MASK (0x1)
-#define STROBE_PIN_EN_MASK (0x1)
-#define TORCH_PIN_EN_MASK (0x1)
-#define PRECHG_MODE_EN_MASK (0x1)
-#define PASS_MODE_ONLY_EN_MASK (0x1)
-#define MODE_BITS_MASK (0x13)
-#define EX_PIN_CONTROL_MASK (0xF1)
-#define EX_PIN_ENABLE_MASK (0x70)
-
-enum lm3556_indic_pulse_time {
- PULSE_TIME_0_MS = 0,
- PULSE_TIME_32_MS,
- PULSE_TIME_64_MS,
- PULSE_TIME_92_MS,
- PULSE_TIME_128_MS,
- PULSE_TIME_160_MS,
- PULSE_TIME_196_MS,
- PULSE_TIME_224_MS,
- PULSE_TIME_256_MS,
- PULSE_TIME_288_MS,
- PULSE_TIME_320_MS,
- PULSE_TIME_352_MS,
- PULSE_TIME_384_MS,
- PULSE_TIME_416_MS,
- PULSE_TIME_448_MS,
- PULSE_TIME_480_MS,
-};
-
-enum lm3556_indic_n_blank {
- INDIC_N_BLANK_0 = 0,
- INDIC_N_BLANK_1,
- INDIC_N_BLANK_2,
- INDIC_N_BLANK_3,
- INDIC_N_BLANK_4,
- INDIC_N_BLANK_5,
- INDIC_N_BLANK_6,
- INDIC_N_BLANK_7,
- INDIC_N_BLANK_8,
- INDIC_N_BLANK_9,
- INDIC_N_BLANK_10,
- INDIC_N_BLANK_11,
- INDIC_N_BLANK_12,
- INDIC_N_BLANK_13,
- INDIC_N_BLANK_14,
- INDIC_N_BLANK_15,
-};
-
-enum lm3556_indic_period {
- INDIC_PERIOD_0 = 0,
- INDIC_PERIOD_1,
- INDIC_PERIOD_2,
- INDIC_PERIOD_3,
- INDIC_PERIOD_4,
- INDIC_PERIOD_5,
- INDIC_PERIOD_6,
- INDIC_PERIOD_7,
-};
-
-enum lm3556_mode {
- MODES_STASNDBY = 0,
- MODES_INDIC,
- MODES_TORCH,
- MODES_FLASH
-};
-
-#define INDIC_PATTERN_SIZE 4
-
-struct indicator {
- u8 blinking;
- u8 period_cnt;
-};
-
-struct lm3556_chip_data {
- struct device *dev;
-
- struct led_classdev cdev_flash;
- struct led_classdev cdev_torch;
- struct led_classdev cdev_indicator;
-
- struct lm3556_platform_data *pdata;
- struct regmap *regmap;
- struct mutex lock;
-
- unsigned int last_flag;
-};
-
-/* indicator pattern */
-static struct indicator indicator_pattern[INDIC_PATTERN_SIZE] = {
- [0] = {(INDIC_N_BLANK_1 << INDIC_N_BLANK_SHIFT)
- | PULSE_TIME_32_MS, INDIC_PERIOD_1},
- [1] = {(INDIC_N_BLANK_15 << INDIC_N_BLANK_SHIFT)
- | PULSE_TIME_32_MS, INDIC_PERIOD_2},
- [2] = {(INDIC_N_BLANK_10 << INDIC_N_BLANK_SHIFT)
- | PULSE_TIME_32_MS, INDIC_PERIOD_4},
- [3] = {(INDIC_N_BLANK_5 << INDIC_N_BLANK_SHIFT)
- | PULSE_TIME_32_MS, INDIC_PERIOD_7},
-};
-
-/* chip initialize */
-static int __devinit lm3556_chip_init(struct lm3556_chip_data *chip)
-{
- unsigned int reg_val;
- int ret;
- struct lm3556_platform_data *pdata = chip->pdata;
-
- /* set config register */
- ret = regmap_read(chip->regmap, REG_CONF, &reg_val);
- if (ret < 0) {
- dev_err(chip->dev, "Failed to read REG_CONF Register\n");
- goto out;
- }
-
- reg_val &= (~EX_PIN_CONTROL_MASK);
- reg_val |= ((pdata->torch_pin_polarity & 0x01)
- << TORCH_PIN_POLARITY_SHIFT);
- reg_val |= ((pdata->strobe_usuage & 0x01) << STROBE_USUAGE_SHIFT);
- reg_val |= ((pdata->strobe_pin_polarity & 0x01)
- << STROBE_PIN_POLARITY_SHIFT);
- reg_val |= ((pdata->tx_pin_polarity & 0x01) << TX_PIN_POLARITY_SHIFT);
- reg_val |= ((pdata->indicator_mode & 0x01) << INDIC_MODE_SHIFT);
-
- ret = regmap_write(chip->regmap, REG_CONF, reg_val);
- if (ret < 0) {
- dev_err(chip->dev, "Failed to write REG_CONF Regisgter\n");
- goto out;
- }
-
- /* set enable register */
- ret = regmap_read(chip->regmap, REG_ENABLE, &reg_val);
- if (ret < 0) {
- dev_err(chip->dev, "Failed to read REG_ENABLE Register\n");
- goto out;
- }
-
- reg_val &= (~EX_PIN_ENABLE_MASK);
- reg_val |= ((pdata->torch_pin_en & 0x01) << TORCH_PIN_EN_SHIFT);
- reg_val |= ((pdata->strobe_pin_en & 0x01) << STROBE_PIN_EN_SHIFT);
- reg_val |= ((pdata->tx_pin_en & 0x01) << TX_PIN_EN_SHIFT);
-
- ret = regmap_write(chip->regmap, REG_ENABLE, reg_val);
- if (ret < 0) {
- dev_err(chip->dev, "Failed to write REG_ENABLE Regisgter\n");
- goto out;
- }
-
-out:
- return ret;
-}
-
-/* chip control */
-static int lm3556_control(struct lm3556_chip_data *chip,
- u8 brightness, enum lm3556_mode opmode)
-{
- int ret;
- struct lm3556_platform_data *pdata = chip->pdata;
-
- ret = regmap_read(chip->regmap, REG_FLAG, &chip->last_flag);
- if (ret < 0) {
- dev_err(chip->dev, "Failed to read REG_FLAG Register\n");
- goto out;
- }
-
- if (chip->last_flag)
- dev_info(chip->dev, "Last FLAG is 0x%x\n", chip->last_flag);
-
- /* brightness 0 means off-state */
- if (!brightness)
- opmode = MODES_STASNDBY;
-
- switch (opmode) {
- case MODES_TORCH:
- ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
- TORCH_I_MASK << TORCH_I_SHIFT,
- (brightness - 1) << TORCH_I_SHIFT);
-
- if (pdata->torch_pin_en)
- opmode |= (TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT);
- break;
-
- case MODES_FLASH:
- ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
- FLASH_I_MASK << FLASH_I_SHIFT,
- (brightness - 1) << FLASH_I_SHIFT);
- break;
-
- case MODES_INDIC:
- ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
- TORCH_I_MASK << TORCH_I_SHIFT,
- (brightness - 1) << TORCH_I_SHIFT);
- break;
-
- case MODES_STASNDBY:
- if (pdata->torch_pin_en)
- opmode |= (TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT);
- break;
-
- default:
- return ret;
- }
- if (ret < 0) {
- dev_err(chip->dev, "Failed to write REG_I_CTRL Register\n");
- goto out;
- }
- ret = regmap_update_bits(chip->regmap, REG_ENABLE,
- MODE_BITS_MASK << MODE_BITS_SHIFT,
- opmode << MODE_BITS_SHIFT);
-
-out:
- return ret;
-}
-
-/* torch */
-static void lm3556_torch_brightness_set(struct led_classdev *cdev,
- enum led_brightness brightness)
-{
- struct lm3556_chip_data *chip =
- container_of(cdev, struct lm3556_chip_data, cdev_torch);
-
- mutex_lock(&chip->lock);
- lm3556_control(chip, brightness, MODES_TORCH);
- mutex_unlock(&chip->lock);
-}
-
-/* flash */
-static void lm3556_strobe_brightness_set(struct led_classdev *cdev,
- enum led_brightness brightness)
-{
- struct lm3556_chip_data *chip =
- container_of(cdev, struct lm3556_chip_data, cdev_flash);
-
- mutex_lock(&chip->lock);
- lm3556_control(chip, brightness, MODES_FLASH);
- mutex_unlock(&chip->lock);
-}
-
-/* indicator */
-static void lm3556_indicator_brightness_set(struct led_classdev *cdev,
- enum led_brightness brightness)
-{
- struct lm3556_chip_data *chip =
- container_of(cdev, struct lm3556_chip_data, cdev_indicator);
-
- mutex_lock(&chip->lock);
- lm3556_control(chip, brightness, MODES_INDIC);
- mutex_unlock(&chip->lock);
-}
-
-/* indicator pattern */
-static ssize_t lm3556_indicator_pattern_store(struct device *dev,
- struct device_attribute *devAttr,
- const char *buf, size_t size)
-{
- ssize_t ret;
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lm3556_chip_data *chip =
- container_of(led_cdev, struct lm3556_chip_data, cdev_indicator);
- unsigned int state;
-
- ret = kstrtouint(buf, 10, &state);
- if (ret)
- goto out;
- if (state > INDIC_PATTERN_SIZE - 1)
- state = INDIC_PATTERN_SIZE - 1;
-
- ret = regmap_write(chip->regmap, REG_INDIC_BLINK,
- indicator_pattern[state].blinking);
- if (ret < 0) {
- dev_err(chip->dev, "Failed to write REG_ENABLE Regisgter\n");
- goto out;
- }
-
- ret = regmap_write(chip->regmap, REG_INDIC_PERIOD,
- indicator_pattern[state].period_cnt);
- if (ret < 0) {
- dev_err(chip->dev, "Failed to write REG_ENABLE Regisgter\n");
- goto out;
- }
-
- return size;
-out:
- dev_err(chip->dev, "Indicator pattern doesn't saved\n");
- return size;
-}
-
-static DEVICE_ATTR(pattern, 0666, NULL, lm3556_indicator_pattern_store);
-
-static const struct regmap_config lm3556_regmap = {
- .reg_bits = 8,
- .val_bits = 8,
- .max_register = REG_MAX,
-};
-
-/* module initialize */
-static int __devinit lm3556_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct lm3556_platform_data *pdata = client->dev.platform_data;
- struct lm3556_chip_data *chip;
-
- int err;
-
- 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 lm3556_chip_data),
- GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
-
- chip->dev = &client->dev;
- chip->pdata = pdata;
-
- chip->regmap = devm_regmap_init_i2c(client, &lm3556_regmap);
- if (IS_ERR(chip->regmap)) {
- err = PTR_ERR(chip->regmap);
- dev_err(&client->dev, "Failed to allocate register map: %d\n",
- err);
- return err;
- }
-
- mutex_init(&chip->lock);
- i2c_set_clientdata(client, chip);
-
- err = lm3556_chip_init(chip);
- if (err < 0)
- goto err_out;
-
- /* flash */
- chip->cdev_flash.name = "flash";
- chip->cdev_flash.max_brightness = 16;
- chip->cdev_flash.brightness_set = lm3556_strobe_brightness_set;
- err = led_classdev_register((struct device *)
- &client->dev, &chip->cdev_flash);
- if (err < 0)
- goto err_out;
- /* torch */
- chip->cdev_torch.name = "torch";
- chip->cdev_torch.max_brightness = 8;
- chip->cdev_torch.brightness_set = lm3556_torch_brightness_set;
- err = led_classdev_register((struct device *)
- &client->dev, &chip->cdev_torch);
- if (err < 0)
- goto err_create_torch_file;
- /* indicator */
- chip->cdev_indicator.name = "indicator";
- chip->cdev_indicator.max_brightness = 8;
- chip->cdev_indicator.brightness_set = lm3556_indicator_brightness_set;
- err = led_classdev_register((struct device *)
- &client->dev, &chip->cdev_indicator);
- if (err < 0)
- goto err_create_indicator_file;
-
- err = device_create_file(chip->cdev_indicator.dev, &dev_attr_pattern);
- if (err < 0)
- goto err_create_pattern_file;
-
- dev_info(&client->dev, "LM3556 is initialized\n");
- return 0;
-
-err_create_pattern_file:
- led_classdev_unregister(&chip->cdev_indicator);
-err_create_indicator_file:
- led_classdev_unregister(&chip->cdev_torch);
-err_create_torch_file:
- led_classdev_unregister(&chip->cdev_flash);
-err_out:
- return err;
-}
-
-static int __devexit lm3556_remove(struct i2c_client *client)
-{
- struct lm3556_chip_data *chip = i2c_get_clientdata(client);
-
- device_remove_file(chip->cdev_indicator.dev, &dev_attr_pattern);
- led_classdev_unregister(&chip->cdev_indicator);
- led_classdev_unregister(&chip->cdev_torch);
- led_classdev_unregister(&chip->cdev_flash);
- regmap_write(chip->regmap, REG_ENABLE, 0);
- return 0;
-}
-
-static const struct i2c_device_id lm3556_id[] = {
- {LM3556_NAME, 0},
- {}
-};
-
-MODULE_DEVICE_TABLE(i2c, lm3556_id);
-
-static struct i2c_driver lm3556_i2c_driver = {
- .driver = {
- .name = LM3556_NAME,
- .owner = THIS_MODULE,
- .pm = NULL,
- },
- .probe = lm3556_probe,
- .remove = __devexit_p(lm3556_remove),
- .id_table = lm3556_id,
-};
-
-module_i2c_driver(lm3556_i2c_driver);
-
-MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3556");
-MODULE_AUTHOR("Daniel Jeong <daniel.jeong@xxxxxx>");
-MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@xxxxxxxxx>");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/leds/leds-lm355x.c b/drivers/leds/leds-lm355x.c
new file mode 100644
index 0000000..46c37e2
--- /dev/null
+++ b/drivers/leds/leds-lm355x.c
@@ -0,0 +1,572 @@
+/*
+* Simple driver for Texas Instruments LM355x 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/workqueue.h>
+#include <linux/platform_data/leds-lm355x.h>
+
+enum lm355x_type {
+ CHIP_LM3554 = 0,
+ CHIP_LM3556,
+};
+
+enum lm355x_regs {
+ REG_FLAG = 0,
+ REG_TORCH_CFG,
+ REG_TORCH_CTRL,
+ REG_STROBE_CFG,
+ REG_FLASH_CTRL,
+ REG_INDI_CFG,
+ REG_INDI_CTRL,
+ REG_OPMODE,
+ REG_MAX,
+};
+
+/* operation mode */
+enum lm355x_mode {
+ MODE_SHDN = 0,
+ MODE_INDIC,
+ MODE_TORCH,
+ MODE_FLASH
+};
+
+/* register map info. */
+struct lm355x_reg_data {
+ u8 regno;
+ u8 mask;
+ u8 shift;
+};
+
+struct lm355x_chip_data {
+ struct device *dev;
+ enum lm355x_type type;
+
+ struct led_classdev cdev_flash;
+ struct led_classdev cdev_torch;
+ struct led_classdev cdev_indicator;
+
+ struct work_struct work_flash;
+ struct work_struct work_torch;
+ struct work_struct work_indicator;
+
+ u8 br_flash;
+ u8 br_torch;
+ u8 br_indicator;
+
+ struct lm355x_platform_data *pdata;
+ struct regmap *regmap;
+ struct mutex lock;
+
+ unsigned int last_flag;
+ struct lm355x_reg_data *regs;
+};
+
+/* specific indicator function for lm3556 */
+enum lm3556_indic_pulse_time {
+ PULSE_TIME_0_MS = 0,
+ PULSE_TIME_32_MS,
+ PULSE_TIME_64_MS,
+ PULSE_TIME_92_MS,
+ PULSE_TIME_128_MS,
+ PULSE_TIME_160_MS,
+ PULSE_TIME_196_MS,
+ PULSE_TIME_224_MS,
+ PULSE_TIME_256_MS,
+ PULSE_TIME_288_MS,
+ PULSE_TIME_320_MS,
+ PULSE_TIME_352_MS,
+ PULSE_TIME_384_MS,
+ PULSE_TIME_416_MS,
+ PULSE_TIME_448_MS,
+ PULSE_TIME_480_MS,
+};
+
+enum lm3556_indic_n_blank {
+ INDIC_N_BLANK_0 = 0,
+ INDIC_N_BLANK_1,
+ INDIC_N_BLANK_2,
+ INDIC_N_BLANK_3,
+ INDIC_N_BLANK_4,
+ INDIC_N_BLANK_5,
+ INDIC_N_BLANK_6,
+ INDIC_N_BLANK_7,
+ INDIC_N_BLANK_8,
+ INDIC_N_BLANK_9,
+ INDIC_N_BLANK_10,
+ INDIC_N_BLANK_11,
+ INDIC_N_BLANK_12,
+ INDIC_N_BLANK_13,
+ INDIC_N_BLANK_14,
+ INDIC_N_BLANK_15,
+};
+
+enum lm3556_indic_period {
+ INDIC_PERIOD_0 = 0,
+ INDIC_PERIOD_1,
+ INDIC_PERIOD_2,
+ INDIC_PERIOD_3,
+ INDIC_PERIOD_4,
+ INDIC_PERIOD_5,
+ INDIC_PERIOD_6,
+ INDIC_PERIOD_7,
+};
+
+#define INDIC_PATTERN_SIZE 4
+
+struct indicator {
+ u8 blinking;
+ u8 period_cnt;
+};
+
+/* indicator pattern data only for lm3556 */
+static struct indicator indicator_pattern[INDIC_PATTERN_SIZE] = {
+ [0] = {(INDIC_N_BLANK_1 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_1},
+ [1] = {(INDIC_N_BLANK_15 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_2},
+ [2] = {(INDIC_N_BLANK_10 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_4},
+ [3] = {(INDIC_N_BLANK_5 << 4) | PULSE_TIME_32_MS, INDIC_PERIOD_7},
+};
+
+static struct lm355x_reg_data lm3554_regs[REG_MAX] = {
+ [REG_FLAG] = {0xD0, 0xBF, 0},
+ [REG_TORCH_CFG] = {0xE0, 0x80, 7},
+ [REG_TORCH_CTRL] = {0xA0, 0x38, 3},
+ [REG_STROBE_CFG] = {0xE0, 0x04, 2},
+ [REG_FLASH_CTRL] = {0xB0, 0x78, 3},
+ [REG_INDI_CFG] = {0xE0, 0x08, 3},
+ [REG_INDI_CTRL] = {0xA0, 0xC0, 6},
+ [REG_OPMODE] = {0xA0, 0x03, 0},
+};
+
+static struct lm355x_reg_data lm3556_regs[REG_MAX] = {
+ [REG_FLAG] = {0x0B, 0xFF, 0},
+ [REG_TORCH_CFG] = {0x0A, 0x10, 4},
+ [REG_TORCH_CTRL] = {0x09, 0x70, 4},
+ [REG_STROBE_CFG] = {0x0A, 0x20, 5},
+ [REG_FLASH_CTRL] = {0x09, 0x0F, 0},
+ [REG_INDI_CFG] = {0xFF, 0xFF, 0},
+ [REG_INDI_CTRL] = {0x09, 0x70, 4},
+ [REG_OPMODE] = {0x0A, 0x03, 0},
+};
+
+static char lm355x_name[][I2C_NAME_SIZE] = {
+ [CHIP_LM3554] = LM3554_NAME,
+ [CHIP_LM3556] = LM3556_NAME,
+};
+
+/* chip initialize */
+static int __devinit lm355x_chip_init(struct lm355x_chip_data *chip)
+{
+ int ret;
+ unsigned int reg_val;
+ struct lm355x_platform_data *pdata = chip->pdata;
+
+ /* input and output pins configuration */
+ switch (chip->type) {
+ case CHIP_LM3554:
+ reg_val = pdata->pin_tx2 | pdata->ntc_pin;
+ ret = regmap_update_bits(chip->regmap, 0xE0, 0x28, reg_val);
+ if (ret < 0)
+ goto out;
+ reg_val = pdata->pass_mode;
+ ret = regmap_update_bits(chip->regmap, 0xA0, 0x04, reg_val);
+ if (ret < 0)
+ goto out;
+ break;
+
+ case CHIP_LM3556:
+ reg_val = pdata->pin_tx2 | pdata->ntc_pin | pdata->pass_mode;
+ ret = regmap_update_bits(chip->regmap, 0x0A, 0xC4, reg_val);
+ if (ret < 0)
+ goto out;
+ break;
+ default:
+ return -ENODATA;
+ }
+
+ return ret;
+out:
+ dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
+ return ret;
+}
+
+/* chip control */
+static void lm355x_control(struct lm355x_chip_data *chip,
+ u8 brightness, enum lm355x_mode opmode)
+{
+ int ret;
+ unsigned int reg_val;
+ struct lm355x_platform_data *pdata = chip->pdata;
+ struct lm355x_reg_data *preg = chip->regs;
+
+ ret = regmap_read(chip->regmap, preg[REG_FLAG].regno, &chip->last_flag);
+ if (ret < 0)
+ goto out;
+ if (chip->last_flag & preg[REG_FLAG].mask)
+ dev_info(chip->dev, "%s Last FLAG is 0x%x\n",
+ lm355x_name[chip->type],
+ chip->last_flag & preg[REG_FLAG].mask);
+ /* brightness 0 means shutdown */
+ if (!brightness)
+ opmode = MODE_SHDN;
+
+ switch (opmode) {
+ case MODE_TORCH:
+ ret =
+ regmap_update_bits(chip->regmap, preg[REG_TORCH_CTRL].regno,
+ preg[REG_TORCH_CTRL].mask,
+ (brightness - 1)
+ << preg[REG_TORCH_CTRL].shift);
+ if (ret < 0)
+ goto out;
+
+ if (pdata->pin_tx1 != LM355x_PIN_TORCH_DISABLE) {
+ ret =
+ regmap_update_bits(chip->regmap,
+ preg[REG_TORCH_CFG].regno,
+ preg[REG_TORCH_CFG].mask,
+ 0x01 <<
+ preg[REG_TORCH_CFG].shift);
+ if (ret < 0)
+ goto out;
+ opmode = MODE_SHDN;
+ dev_info(chip->dev,
+ "torch brt is set - ext. torch pin mode\n");
+ }
+ break;
+
+ case MODE_FLASH:
+
+ ret =
+ regmap_update_bits(chip->regmap, preg[REG_FLASH_CTRL].regno,
+ preg[REG_FLASH_CTRL].mask,
+ (brightness - 1)
+ << preg[REG_FLASH_CTRL].shift);
+ if (ret < 0)
+ goto out;
+
+ if (pdata->pin_strobe != LM355x_PIN_STROBE_DISABLE) {
+ if (chip->type == CHIP_LM3554)
+ reg_val = 0x00;
+ else
+ reg_val = 0x01;
+ ret =
+ regmap_update_bits(chip->regmap,
+ preg[REG_STROBE_CFG].regno,
+ preg[REG_STROBE_CFG].mask,
+ reg_val <<
+ preg[REG_STROBE_CFG].shift);
+ if (ret < 0)
+ goto out;
+ opmode = MODE_SHDN;
+ dev_info(chip->dev,
+ "flash brt is set - ext. strobe pin mode\n");
+ }
+ break;
+
+ case MODE_INDIC:
+ ret =
+ regmap_update_bits(chip->regmap, preg[REG_INDI_CTRL].regno,
+ preg[REG_INDI_CTRL].mask,
+ (brightness - 1)
+ << preg[REG_INDI_CTRL].shift);
+ if (ret < 0)
+ goto out;
+
+ if (pdata->pin_tx2 != LM355x_PIN_TX_DISABLE) {
+ ret =
+ regmap_update_bits(chip->regmap,
+ preg[REG_INDI_CFG].regno,
+ preg[REG_INDI_CFG].mask,
+ 0x01 <<
+ preg[REG_INDI_CFG].shift);
+ if (ret < 0)
+ goto out;
+ opmode = MODE_SHDN;
+ }
+ break;
+ case MODE_SHDN:
+ break;
+ default:
+ return;
+ }
+ /* operation mode control */
+ ret = regmap_update_bits(chip->regmap, preg[REG_OPMODE].regno,
+ preg[REG_OPMODE].mask,
+ opmode << preg[REG_OPMODE].shift);
+ if (ret < 0)
+ goto out;
+ return;
+out:
+ dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
+ return;
+}
+
+/* torch */
+static void lm355x_deferred_torch_brightness_set(struct work_struct *work)
+{
+ struct lm355x_chip_data *chip =
+ container_of(work, struct lm355x_chip_data, work_torch);
+
+ mutex_lock(&chip->lock);
+ lm355x_control(chip, chip->br_torch, MODE_TORCH);
+ mutex_unlock(&chip->lock);
+}
+
+static void lm355x_torch_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lm355x_chip_data *chip =
+ container_of(cdev, struct lm355x_chip_data, cdev_torch);
+
+ chip->br_torch = brightness;
+ schedule_work(&chip->work_torch);
+}
+
+/* flash */
+static void lm355x_deferred_strobe_brightness_set(struct work_struct *work)
+{
+ struct lm355x_chip_data *chip =
+ container_of(work, struct lm355x_chip_data, work_flash);
+
+ mutex_lock(&chip->lock);
+ lm355x_control(chip, chip->br_flash, MODE_FLASH);
+ mutex_unlock(&chip->lock);
+}
+
+static void lm355x_strobe_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lm355x_chip_data *chip =
+ container_of(cdev, struct lm355x_chip_data, cdev_flash);
+
+ chip->br_flash = brightness;
+ schedule_work(&chip->work_flash);
+}
+
+/* indicator */
+static void lm355x_deferred_indicator_brightness_set(struct work_struct *work)
+{
+ struct lm355x_chip_data *chip =
+ container_of(work, struct lm355x_chip_data, work_indicator);
+
+ mutex_lock(&chip->lock);
+ lm355x_control(chip, chip->br_indicator, MODE_INDIC);
+ mutex_unlock(&chip->lock);
+}
+
+static void lm355x_indicator_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct lm355x_chip_data *chip =
+ container_of(cdev, struct lm355x_chip_data, cdev_indicator);
+
+ chip->br_indicator = brightness;
+ schedule_work(&chip->work_indicator);
+}
+
+/* indicator pattern only for lm3556*/
+static ssize_t lm3556_indicator_pattern_store(struct device *dev,
+ struct device_attribute *devAttr,
+ const char *buf, size_t size)
+{
+ ssize_t ret;
+ struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ struct lm355x_chip_data *chip =
+ container_of(led_cdev, struct lm355x_chip_data, cdev_indicator);
+ unsigned int state;
+
+ ret = kstrtouint(buf, 10, &state);
+ if (ret)
+ goto out;
+ if (state > INDIC_PATTERN_SIZE - 1)
+ state = INDIC_PATTERN_SIZE - 1;
+
+ ret = regmap_write(chip->regmap, 0x04,
+ indicator_pattern[state].blinking);
+ if (ret < 0)
+ goto out;
+
+ ret = regmap_write(chip->regmap, 0x05,
+ indicator_pattern[state].period_cnt);
+ if (ret < 0)
+ goto out;
+
+ return size;
+out:
+ dev_err(chip->dev, "%s:i2c access fail to register\n", __func__);
+ return size;
+}
+
+static DEVICE_ATTR(pattern, 0666, NULL, lm3556_indicator_pattern_store);
+
+static const struct regmap_config lm355x_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0xFF,
+};
+
+/* module initialize */
+static int __devinit lm355x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lm355x_platform_data *pdata = client->dev.platform_data;
+ struct lm355x_chip_data *chip;
+
+ int err;
+
+ 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 lm355x_chip_data), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->dev = &client->dev;
+ chip->type = id->driver_data;
+ switch (id->driver_data) {
+ case CHIP_LM3554:
+ chip->regs = lm3554_regs;
+ break;
+ case CHIP_LM3556:
+ chip->regs = lm3556_regs;
+ break;
+ default:
+ return -ENOSYS;
+ }
+ chip->pdata = pdata;
+
+ chip->regmap = devm_regmap_init_i2c(client, &lm355x_regmap);
+ if (IS_ERR(chip->regmap)) {
+ err = PTR_ERR(chip->regmap);
+ dev_err(&client->dev,
+ "Failed to allocate register map: %d\n", err);
+ return err;
+ }
+
+ mutex_init(&chip->lock);
+ i2c_set_clientdata(client, chip);
+
+ err = lm355x_chip_init(chip);
+ if (err < 0)
+ goto err_out;
+
+ /* flash */
+ INIT_WORK(&chip->work_flash, lm355x_deferred_strobe_brightness_set);
+ chip->cdev_flash.name = "flash";
+ chip->cdev_flash.max_brightness = 16;
+ chip->cdev_flash.brightness_set = lm355x_strobe_brightness_set;
+ err = led_classdev_register((struct device *)
+ &client->dev, &chip->cdev_flash);
+ if (err < 0)
+ goto err_out;
+ /* torch */
+ INIT_WORK(&chip->work_torch, lm355x_deferred_torch_brightness_set);
+ chip->cdev_torch.name = "torch";
+ chip->cdev_torch.max_brightness = 8;
+ chip->cdev_torch.brightness_set = lm355x_torch_brightness_set;
+ err = led_classdev_register((struct device *)
+ &client->dev, &chip->cdev_torch);
+ if (err < 0)
+ goto err_create_torch_file;
+ /* indicator */
+ INIT_WORK(&chip->work_indicator,
+ lm355x_deferred_indicator_brightness_set);
+ chip->cdev_indicator.name = "indicator";
+ if (id->driver_data == CHIP_LM3554)
+ chip->cdev_indicator.max_brightness = 4;
+ else
+ chip->cdev_indicator.max_brightness = 8;
+ chip->cdev_indicator.brightness_set = lm355x_indicator_brightness_set;
+ err = led_classdev_register((struct device *)
+ &client->dev, &chip->cdev_indicator);
+ if (err < 0)
+ goto err_create_indicator_file;
+ /* indicator pattern control only for LM3554 */
+ if (id->driver_data == CHIP_LM3556) {
+ err =
+ device_create_file(chip->cdev_indicator.dev,
+ &dev_attr_pattern);
+ if (err < 0)
+ goto err_create_pattern_file;
+ }
+
+ dev_info(&client->dev, "%s is initialized\n",
+ lm355x_name[id->driver_data]);
+ return 0;
+
+err_create_pattern_file:
+ led_classdev_unregister(&chip->cdev_indicator);
+err_create_indicator_file:
+ led_classdev_unregister(&chip->cdev_torch);
+err_create_torch_file:
+ led_classdev_unregister(&chip->cdev_flash);
+err_out:
+ return err;
+}
+
+static int __devexit lm355x_remove(struct i2c_client *client)
+{
+ struct lm355x_chip_data *chip = i2c_get_clientdata(client);
+ struct lm355x_reg_data *preg = chip->regs;
+
+ regmap_write(chip->regmap, preg[REG_OPMODE].regno, 0);
+ if (chip->type == CHIP_LM3556)
+ device_remove_file(chip->cdev_indicator.dev, &dev_attr_pattern);
+ led_classdev_unregister(&chip->cdev_indicator);
+ flush_work_sync(&chip->work_indicator);
+ led_classdev_unregister(&chip->cdev_torch);
+ flush_work_sync(&chip->work_torch);
+ led_classdev_unregister(&chip->cdev_flash);
+ flush_work_sync(&chip->work_flash);
+ dev_info(&client->dev, "%s is removed\n", lm355x_name[chip->type]);
+
+ return 0;
+}
+
+static const struct i2c_device_id lm355x_id[] = {
+ {LM3554_NAME, CHIP_LM3554},
+ {LM3556_NAME, CHIP_LM3556},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, lm355x_id);
+
+static struct i2c_driver lm355x_i2c_driver = {
+ .driver = {
+ .name = LM355x_NAME,
+ .owner = THIS_MODULE,
+ .pm = NULL,
+ },
+ .probe = lm355x_probe,
+ .remove = __devexit_p(lm355x_remove),
+ .id_table = lm355x_id,
+};
+
+module_i2c_driver(lm355x_i2c_driver);
+
+MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM355x");
+MODULE_AUTHOR("Daniel Jeong <daniel.jeong@xxxxxx>");
+MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@xxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/platform_data/leds-lm3556.h b/include/linux/platform_data/leds-lm3556.h
deleted file mode 100644
index 4b4e7d6..0000000
--- a/include/linux/platform_data/leds-lm3556.h
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Simple driver for Texas Instruments LM3556 LED Flash driver chip (Rev0x03)
- * 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.
- *
- */
-
-#ifndef __LINUX_LM3556_H
-#define __LINUX_LM3556_H
-
-#define LM3556_NAME "leds-lm3556"
-
-enum lm3556_pin_polarity {
- PIN_LOW_ACTIVE = 0,
- PIN_HIGH_ACTIVE,
-};
-
-enum lm3556_pin_enable {
- PIN_DISABLED = 0,
- PIN_ENABLED,
-};
-
-enum lm3556_strobe_usuage {
- STROBE_EDGE_DETECT = 0,
- STROBE_LEVEL_DETECT,
-};
-
-enum lm3556_indic_mode {
- INDIC_MODE_INTERNAL = 0,
- INDIC_MODE_EXTERNAL,
-};
-
-struct lm3556_platform_data {
- enum lm3556_pin_enable torch_pin_en;
- enum lm3556_pin_polarity torch_pin_polarity;
-
- enum lm3556_strobe_usuage strobe_usuage;
- enum lm3556_pin_enable strobe_pin_en;
- enum lm3556_pin_polarity strobe_pin_polarity;
-
- enum lm3556_pin_enable tx_pin_en;
- enum lm3556_pin_polarity tx_pin_polarity;
-
- enum lm3556_indic_mode indicator_mode;
-};
-
-#endif /* __LINUX_LM3556_H */
diff --git a/include/linux/platform_data/leds-lm355x.h b/include/linux/platform_data/leds-lm355x.h
new file mode 100644
index 0000000..b88724b
--- /dev/null
+++ b/include/linux/platform_data/leds-lm355x.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2012 Texas Instruments
+ *
+ * License Terms: GNU General Public License v2
+ *
+ * Simple driver for Texas Instruments LM355x LED driver chip
+ *
+ * Author: G.Shark Jeong <gshark.jeong@xxxxxxxxx>
+ * Daniel Jeong <daniel.jeong@xxxxxx>
+ */
+
+#define LM355x_NAME "leds-lm355x"
+#define LM3554_NAME "leds-lm3554"
+#define LM3556_NAME "leds-lm3556"
+
+/* lm3554 : strobe def. on */
+enum lm355x_strobe {
+ LM355x_PIN_STROBE_DISABLE = 0x00,
+ LM355x_PIN_STROBE_ENABLE = 0x01,
+};
+
+enum lm355x_torch {
+ LM355x_PIN_TORCH_DISABLE = 0,
+ LM3554_PIN_TORCH_ENABLE = 0x80,
+ LM3556_PIN_TORCH_ENABLE = 0x10,
+};
+
+enum lm355x_tx2 {
+ LM355x_PIN_TX_DISABLE = 0,
+ LM3554_PIN_TX_ENABLE = 0x20,
+ LM3556_PIN_TX_ENABLE = 0x40,
+};
+
+enum lm355x_ntc {
+ LM355x_PIN_NTC_DISABLE = 0,
+ LM3554_PIN_NTC_ENABLE = 0x08,
+ LM3556_PIN_NTC_ENABLE = 0x80,
+};
+
+enum lm355x_pmode {
+ LM355x_PMODE_DISABLE = 0,
+ LM355x_PMODE_ENABLE = 0x04,
+};
+
+/*
+ * struct lm3554_platform_data
+ * @pin_strobe: strobe input
+ * @pin_torch : input pin
+ * lm3554-tx1/torch/gpio1
+ * lm3556-torch
+ * @pin_tx2 : input pin
+ * lm3554-envm/tx2/gpio2
+ * lm3556-tx pin
+ * @ntc_pin : output pin
+ * lm3554-ledi/ntc
+ * lm3556-temp pin
+ * @pass_mode : pass mode
+ */
+struct lm355x_platform_data {
+ enum lm355x_strobe pin_strobe;
+ enum lm355x_torch pin_tx1;
+ enum lm355x_tx2 pin_tx2;
+ enum lm355x_ntc ntc_pin;
+
+ enum lm355x_pmode pass_mode;
+};
--
1.7.5.4

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