backlight: lm3630: apply chip revision
authorDaniel Jeong <gshark.jeong@gmail.com>
Tue, 12 Nov 2013 23:08:58 +0000 (15:08 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 13 Nov 2013 03:09:15 +0000 (12:09 +0900)
The LM3630 chip was revised by TI and chip name was also changed to
LM3630A.  And register map, default values and initial sequences are
changed.  The files, lm3630_bl.{c,h} are replaced by lm3630a_bl.{c,h} You
can find more information about LM3630A(datasheet, evm etc) at
http://www.ti.com/product/lm3630a

Signed-off-by: Daniel Jeong <gshark.jeong@gmail.com>
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/video/backlight/Kconfig
drivers/video/backlight/Makefile
drivers/video/backlight/lm3630_bl.c [deleted file]
drivers/video/backlight/lm3630a_bl.c [new file with mode: 0644]
include/linux/platform_data/lm3630_bl.h [deleted file]
include/linux/platform_data/lm3630a_bl.h [new file with mode: 0644]

index a65dd063ecad7b3830aaf1bc9fc73cc2dd8e58ab..5a3eb2ecb525c2b52a2d1f5d8decb688a93bb99d 100644 (file)
@@ -368,12 +368,12 @@ config BACKLIGHT_AAT2870
          If you have a AnalogicTech AAT2870 say Y to enable the
          backlight driver.
 
-config BACKLIGHT_LM3630
-       tristate "Backlight Driver for LM3630"
+config BACKLIGHT_LM3630A
+       tristate "Backlight Driver for LM3630A"
        depends on BACKLIGHT_CLASS_DEVICE && I2C
        select REGMAP_I2C
        help
-         This supports TI LM3630 Backlight Driver
+         This supports TI LM3630A Backlight Driver
 
 config BACKLIGHT_LM3639
        tristate "Backlight Driver for LM3639"
index 38e1babb194636b7e886347a689d9133e09f4153..bb820024f346df519cc8984078a1bf8fd8a7bf70 100644 (file)
@@ -37,7 +37,7 @@ obj-$(CONFIG_BACKLIGHT_GPIO)          += gpio_backlight.o
 obj-$(CONFIG_BACKLIGHT_HP680)          += hp680_bl.o
 obj-$(CONFIG_BACKLIGHT_HP700)          += jornada720_bl.o
 obj-$(CONFIG_BACKLIGHT_LM3533)         += lm3533_bl.o
-obj-$(CONFIG_BACKLIGHT_LM3630)         += lm3630_bl.o
+obj-$(CONFIG_BACKLIGHT_LM3630A)                += lm3630a_bl.o
 obj-$(CONFIG_BACKLIGHT_LM3639)         += lm3639_bl.o
 obj-$(CONFIG_BACKLIGHT_LOCOMO)         += locomolcd.o
 obj-$(CONFIG_BACKLIGHT_LP855X)         += lp855x_bl.o
diff --git a/drivers/video/backlight/lm3630_bl.c b/drivers/video/backlight/lm3630_bl.c
deleted file mode 100644 (file)
index 76a62e9..0000000
+++ /dev/null
@@ -1,475 +0,0 @@
-/*
-* Simple driver for Texas Instruments LM3630 Backlight 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/slab.h>
-#include <linux/i2c.h>
-#include <linux/backlight.h>
-#include <linux/err.h>
-#include <linux/delay.h>
-#include <linux/uaccess.h>
-#include <linux/interrupt.h>
-#include <linux/regmap.h>
-#include <linux/platform_data/lm3630_bl.h>
-
-#define REG_CTRL       0x00
-#define REG_CONFIG     0x01
-#define REG_BRT_A      0x03
-#define REG_BRT_B      0x04
-#define REG_INT_STATUS 0x09
-#define REG_INT_EN     0x0A
-#define REG_FAULT      0x0B
-#define REG_PWM_OUTLOW 0x12
-#define REG_PWM_OUTHIGH        0x13
-#define REG_MAX                0x1F
-
-#define INT_DEBOUNCE_MSEC      10
-
-enum lm3630_leds {
-       BLED_ALL = 0,
-       BLED_1,
-       BLED_2
-};
-
-static const char * const bled_name[] = {
-       [BLED_ALL] = "lm3630_bled",     /*Bank1 controls all string */
-       [BLED_1] = "lm3630_bled1",      /*Bank1 controls bled1 */
-       [BLED_2] = "lm3630_bled2",      /*Bank1 or 2 controls bled2 */
-};
-
-struct lm3630_chip_data {
-       struct device *dev;
-       struct delayed_work work;
-       int irq;
-       struct workqueue_struct *irqthread;
-       struct lm3630_platform_data *pdata;
-       struct backlight_device *bled1;
-       struct backlight_device *bled2;
-       struct regmap *regmap;
-};
-
-/* initialize chip */
-static int lm3630_chip_init(struct lm3630_chip_data *pchip)
-{
-       int ret;
-       unsigned int reg_val;
-       struct lm3630_platform_data *pdata = pchip->pdata;
-
-       /*pwm control */
-       reg_val = ((pdata->pwm_active & 0x01) << 2) | (pdata->pwm_ctrl & 0x03);
-       ret = regmap_update_bits(pchip->regmap, REG_CONFIG, 0x07, reg_val);
-       if (ret < 0)
-               goto out;
-
-       /* bank control */
-       reg_val = ((pdata->bank_b_ctrl & 0x01) << 1) |
-                       (pdata->bank_a_ctrl & 0x07);
-       ret = regmap_update_bits(pchip->regmap, REG_CTRL, 0x07, reg_val);
-       if (ret < 0)
-               goto out;
-
-       ret = regmap_update_bits(pchip->regmap, REG_CTRL, 0x80, 0x00);
-       if (ret < 0)
-               goto out;
-
-       /* set initial brightness */
-       if (pdata->bank_a_ctrl != BANK_A_CTRL_DISABLE) {
-               ret = regmap_write(pchip->regmap,
-                                  REG_BRT_A, pdata->init_brt_led1);
-               if (ret < 0)
-                       goto out;
-       }
-
-       if (pdata->bank_b_ctrl != BANK_B_CTRL_DISABLE) {
-               ret = regmap_write(pchip->regmap,
-                                  REG_BRT_B, pdata->init_brt_led2);
-               if (ret < 0)
-                       goto out;
-       }
-       return ret;
-
-out:
-       dev_err(pchip->dev, "i2c failed to access register\n");
-       return ret;
-}
-
-/* interrupt handling */
-static void lm3630_delayed_func(struct work_struct *work)
-{
-       int ret;
-       unsigned int reg_val;
-       struct lm3630_chip_data *pchip;
-
-       pchip = container_of(work, struct lm3630_chip_data, work.work);
-
-       ret = regmap_read(pchip->regmap, REG_INT_STATUS, &reg_val);
-       if (ret < 0) {
-               dev_err(pchip->dev,
-                       "i2c failed to access REG_INT_STATUS Register\n");
-               return;
-       }
-
-       dev_info(pchip->dev, "REG_INT_STATUS Register is 0x%x\n", reg_val);
-}
-
-static irqreturn_t lm3630_isr_func(int irq, void *chip)
-{
-       int ret;
-       struct lm3630_chip_data *pchip = chip;
-       unsigned long delay = msecs_to_jiffies(INT_DEBOUNCE_MSEC);
-
-       queue_delayed_work(pchip->irqthread, &pchip->work, delay);
-
-       ret = regmap_update_bits(pchip->regmap, REG_CTRL, 0x80, 0x00);
-       if (ret < 0)
-               goto out;
-
-       return IRQ_HANDLED;
-out:
-       dev_err(pchip->dev, "i2c failed to access register\n");
-       return IRQ_HANDLED;
-}
-
-static int lm3630_intr_config(struct lm3630_chip_data *pchip)
-{
-       INIT_DELAYED_WORK(&pchip->work, lm3630_delayed_func);
-       pchip->irqthread = create_singlethread_workqueue("lm3630-irqthd");
-       if (!pchip->irqthread) {
-               dev_err(pchip->dev, "create irq thread fail...\n");
-               return -1;
-       }
-       if (request_threaded_irq
-           (pchip->irq, NULL, lm3630_isr_func,
-            IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "lm3630_irq", pchip)) {
-               dev_err(pchip->dev, "request threaded irq fail..\n");
-               return -1;
-       }
-       return 0;
-}
-
-static bool
-set_intensity(struct backlight_device *bl, struct lm3630_chip_data *pchip)
-{
-       if (!pchip->pdata->pwm_set_intensity)
-               return false;
-       pchip->pdata->pwm_set_intensity(bl->props.brightness - 1,
-                                       pchip->pdata->pwm_period);
-       return true;
-}
-
-/* update and get brightness */
-static int lm3630_bank_a_update_status(struct backlight_device *bl)
-{
-       int ret;
-       struct lm3630_chip_data *pchip = bl_get_data(bl);
-       enum lm3630_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
-
-       /* brightness 0 means disable */
-       if (!bl->props.brightness) {
-               ret = regmap_update_bits(pchip->regmap, REG_CTRL, 0x04, 0x00);
-               if (ret < 0)
-                       goto out;
-               return bl->props.brightness;
-       }
-
-       /* pwm control */
-       if (pwm_ctrl == PWM_CTRL_BANK_A || pwm_ctrl == PWM_CTRL_BANK_ALL) {
-               if (!set_intensity(bl, pchip))
-                       dev_err(pchip->dev, "No pwm control func. in plat-data\n");
-       } else {
-
-               /* i2c control */
-               ret = regmap_update_bits(pchip->regmap, REG_CTRL, 0x80, 0x00);
-               if (ret < 0)
-                       goto out;
-               mdelay(1);
-               ret = regmap_write(pchip->regmap,
-                                  REG_BRT_A, bl->props.brightness - 1);
-               if (ret < 0)
-                       goto out;
-       }
-       return bl->props.brightness;
-out:
-       dev_err(pchip->dev, "i2c failed to access REG_CTRL\n");
-       return bl->props.brightness;
-}
-
-static int lm3630_bank_a_get_brightness(struct backlight_device *bl)
-{
-       unsigned int reg_val;
-       int brightness, ret;
-       struct lm3630_chip_data *pchip = bl_get_data(bl);
-       enum lm3630_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
-
-       if (pwm_ctrl == PWM_CTRL_BANK_A || pwm_ctrl == PWM_CTRL_BANK_ALL) {
-               ret = regmap_read(pchip->regmap, REG_PWM_OUTHIGH, &reg_val);
-               if (ret < 0)
-                       goto out;
-               brightness = reg_val & 0x01;
-               ret = regmap_read(pchip->regmap, REG_PWM_OUTLOW, &reg_val);
-               if (ret < 0)
-                       goto out;
-               brightness = ((brightness << 8) | reg_val) + 1;
-       } else {
-               ret = regmap_update_bits(pchip->regmap, REG_CTRL, 0x80, 0x00);
-               if (ret < 0)
-                       goto out;
-               mdelay(1);
-               ret = regmap_read(pchip->regmap, REG_BRT_A, &reg_val);
-               if (ret < 0)
-                       goto out;
-               brightness = reg_val + 1;
-       }
-       bl->props.brightness = brightness;
-       return bl->props.brightness;
-out:
-       dev_err(pchip->dev, "i2c failed to access register\n");
-       return 0;
-}
-
-static const struct backlight_ops lm3630_bank_a_ops = {
-       .options = BL_CORE_SUSPENDRESUME,
-       .update_status = lm3630_bank_a_update_status,
-       .get_brightness = lm3630_bank_a_get_brightness,
-};
-
-static int lm3630_bank_b_update_status(struct backlight_device *bl)
-{
-       int ret;
-       struct lm3630_chip_data *pchip = bl_get_data(bl);
-       enum lm3630_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
-
-       if (pwm_ctrl == PWM_CTRL_BANK_B || pwm_ctrl == PWM_CTRL_BANK_ALL) {
-               if (!set_intensity(bl, pchip))
-                       dev_err(pchip->dev,
-                               "no pwm control func. in plat-data\n");
-       } else {
-               ret = regmap_update_bits(pchip->regmap, REG_CTRL, 0x80, 0x00);
-               if (ret < 0)
-                       goto out;
-               mdelay(1);
-               ret = regmap_write(pchip->regmap,
-                                  REG_BRT_B, bl->props.brightness - 1);
-       }
-       return bl->props.brightness;
-out:
-       dev_err(pchip->dev, "i2c failed to access register\n");
-       return bl->props.brightness;
-}
-
-static int lm3630_bank_b_get_brightness(struct backlight_device *bl)
-{
-       unsigned int reg_val;
-       int brightness, ret;
-       struct lm3630_chip_data *pchip = bl_get_data(bl);
-       enum lm3630_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
-
-       if (pwm_ctrl == PWM_CTRL_BANK_B || pwm_ctrl == PWM_CTRL_BANK_ALL) {
-               ret = regmap_read(pchip->regmap, REG_PWM_OUTHIGH, &reg_val);
-               if (ret < 0)
-                       goto out;
-               brightness = reg_val & 0x01;
-               ret = regmap_read(pchip->regmap, REG_PWM_OUTLOW, &reg_val);
-               if (ret < 0)
-                       goto out;
-               brightness = ((brightness << 8) | reg_val) + 1;
-       } else {
-               ret = regmap_update_bits(pchip->regmap, REG_CTRL, 0x80, 0x00);
-               if (ret < 0)
-                       goto out;
-               mdelay(1);
-               ret = regmap_read(pchip->regmap, REG_BRT_B, &reg_val);
-               if (ret < 0)
-                       goto out;
-               brightness = reg_val + 1;
-       }
-       bl->props.brightness = brightness;
-
-       return bl->props.brightness;
-out:
-       dev_err(pchip->dev, "i2c failed to access register\n");
-       return bl->props.brightness;
-}
-
-static const struct backlight_ops lm3630_bank_b_ops = {
-       .options = BL_CORE_SUSPENDRESUME,
-       .update_status = lm3630_bank_b_update_status,
-       .get_brightness = lm3630_bank_b_get_brightness,
-};
-
-static int lm3630_backlight_register(struct lm3630_chip_data *pchip,
-                                    enum lm3630_leds ledno)
-{
-       const char *name = bled_name[ledno];
-       struct backlight_properties props;
-       struct lm3630_platform_data *pdata = pchip->pdata;
-
-       props.type = BACKLIGHT_RAW;
-       switch (ledno) {
-       case BLED_1:
-       case BLED_ALL:
-               props.brightness = pdata->init_brt_led1;
-               props.max_brightness = pdata->max_brt_led1;
-               pchip->bled1 =
-                   backlight_device_register(name, pchip->dev, pchip,
-                                             &lm3630_bank_a_ops, &props);
-               if (IS_ERR(pchip->bled1))
-                       return PTR_ERR(pchip->bled1);
-               break;
-       case BLED_2:
-               props.brightness = pdata->init_brt_led2;
-               props.max_brightness = pdata->max_brt_led2;
-               pchip->bled2 =
-                   backlight_device_register(name, pchip->dev, pchip,
-                                             &lm3630_bank_b_ops, &props);
-               if (IS_ERR(pchip->bled2))
-                       return PTR_ERR(pchip->bled2);
-               break;
-       }
-       return 0;
-}
-
-static void lm3630_backlight_unregister(struct lm3630_chip_data *pchip)
-{
-       if (pchip->bled1)
-               backlight_device_unregister(pchip->bled1);
-       if (pchip->bled2)
-               backlight_device_unregister(pchip->bled2);
-}
-
-static const struct regmap_config lm3630_regmap = {
-       .reg_bits = 8,
-       .val_bits = 8,
-       .max_register = REG_MAX,
-};
-
-static int lm3630_probe(struct i2c_client *client,
-                                 const struct i2c_device_id *id)
-{
-       struct lm3630_platform_data *pdata = client->dev.platform_data;
-       struct lm3630_chip_data *pchip;
-       int ret;
-
-       if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
-               dev_err(&client->dev, "fail : i2c functionality check...\n");
-               return -EOPNOTSUPP;
-       }
-
-       if (pdata == NULL) {
-               dev_err(&client->dev, "fail : no platform data.\n");
-               return -ENODATA;
-       }
-
-       pchip = devm_kzalloc(&client->dev, sizeof(struct lm3630_chip_data),
-                            GFP_KERNEL);
-       if (!pchip)
-               return -ENOMEM;
-       pchip->pdata = pdata;
-       pchip->dev = &client->dev;
-
-       pchip->regmap = devm_regmap_init_i2c(client, &lm3630_regmap);
-       if (IS_ERR(pchip->regmap)) {
-               ret = PTR_ERR(pchip->regmap);
-               dev_err(&client->dev, "fail : allocate register map: %d\n",
-                       ret);
-               return ret;
-       }
-       i2c_set_clientdata(client, pchip);
-
-       /* chip initialize */
-       ret = lm3630_chip_init(pchip);
-       if (ret < 0) {
-               dev_err(&client->dev, "fail : init chip\n");
-               goto err_chip_init;
-       }
-
-       switch (pdata->bank_a_ctrl) {
-       case BANK_A_CTRL_ALL:
-               ret = lm3630_backlight_register(pchip, BLED_ALL);
-               pdata->bank_b_ctrl = BANK_B_CTRL_DISABLE;
-               break;
-       case BANK_A_CTRL_LED1:
-               ret = lm3630_backlight_register(pchip, BLED_1);
-               break;
-       case BANK_A_CTRL_LED2:
-               ret = lm3630_backlight_register(pchip, BLED_2);
-               pdata->bank_b_ctrl = BANK_B_CTRL_DISABLE;
-               break;
-       default:
-               break;
-       }
-
-       if (ret < 0)
-               goto err_bl_reg;
-
-       if (pdata->bank_b_ctrl && pchip->bled2 == NULL) {
-               ret = lm3630_backlight_register(pchip, BLED_2);
-               if (ret < 0)
-                       goto err_bl_reg;
-       }
-
-       /* interrupt enable  : irq 0 is not allowed for lm3630 */
-       pchip->irq = client->irq;
-       if (pchip->irq)
-               lm3630_intr_config(pchip);
-
-       dev_info(&client->dev, "LM3630 backlight register OK.\n");
-       return 0;
-
-err_bl_reg:
-       dev_err(&client->dev, "fail : backlight register.\n");
-       lm3630_backlight_unregister(pchip);
-err_chip_init:
-       return ret;
-}
-
-static int lm3630_remove(struct i2c_client *client)
-{
-       int ret;
-       struct lm3630_chip_data *pchip = i2c_get_clientdata(client);
-
-       ret = regmap_write(pchip->regmap, REG_BRT_A, 0);
-       if (ret < 0)
-               dev_err(pchip->dev, "i2c failed to access register\n");
-
-       ret = regmap_write(pchip->regmap, REG_BRT_B, 0);
-       if (ret < 0)
-               dev_err(pchip->dev, "i2c failed to access register\n");
-
-       lm3630_backlight_unregister(pchip);
-       if (pchip->irq) {
-               free_irq(pchip->irq, pchip);
-               flush_workqueue(pchip->irqthread);
-               destroy_workqueue(pchip->irqthread);
-       }
-       return 0;
-}
-
-static const struct i2c_device_id lm3630_id[] = {
-       {LM3630_NAME, 0},
-       {}
-};
-
-MODULE_DEVICE_TABLE(i2c, lm3630_id);
-
-static struct i2c_driver lm3630_i2c_driver = {
-       .driver = {
-                  .name = LM3630_NAME,
-                  },
-       .probe = lm3630_probe,
-       .remove = lm3630_remove,
-       .id_table = lm3630_id,
-};
-
-module_i2c_driver(lm3630_i2c_driver);
-
-MODULE_DESCRIPTION("Texas Instruments Backlight driver for LM3630");
-MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>");
-MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/video/backlight/lm3630a_bl.c b/drivers/video/backlight/lm3630a_bl.c
new file mode 100644 (file)
index 0000000..cf40cc8
--- /dev/null
@@ -0,0 +1,483 @@
+/*
+* Simple driver for Texas Instruments LM3630A Backlight 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/slab.h>
+#include <linux/i2c.h>
+#include <linux/backlight.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/uaccess.h>
+#include <linux/interrupt.h>
+#include <linux/regmap.h>
+#include <linux/pwm.h>
+#include <linux/platform_data/lm3630a_bl.h>
+
+#define REG_CTRL       0x00
+#define REG_BOOST      0x02
+#define REG_CONFIG     0x01
+#define REG_BRT_A      0x03
+#define REG_BRT_B      0x04
+#define REG_I_A                0x05
+#define REG_I_B                0x06
+#define REG_INT_STATUS 0x09
+#define REG_INT_EN     0x0A
+#define REG_FAULT      0x0B
+#define REG_PWM_OUTLOW 0x12
+#define REG_PWM_OUTHIGH        0x13
+#define REG_MAX                0x1F
+
+#define INT_DEBOUNCE_MSEC      10
+struct lm3630a_chip {
+       struct device *dev;
+       struct delayed_work work;
+
+       int irq;
+       struct workqueue_struct *irqthread;
+       struct lm3630a_platform_data *pdata;
+       struct backlight_device *bleda;
+       struct backlight_device *bledb;
+       struct regmap *regmap;
+       struct pwm_device *pwmd;
+};
+
+/* i2c access */
+static int lm3630a_read(struct lm3630a_chip *pchip, unsigned int reg)
+{
+       int rval;
+       unsigned int reg_val;
+
+       rval = regmap_read(pchip->regmap, reg, &reg_val);
+       if (rval < 0)
+               return rval;
+       return reg_val & 0xFF;
+}
+
+static int lm3630a_write(struct lm3630a_chip *pchip,
+                        unsigned int reg, unsigned int data)
+{
+       return regmap_write(pchip->regmap, reg, data);
+}
+
+static int lm3630a_update(struct lm3630a_chip *pchip,
+                         unsigned int reg, unsigned int mask,
+                         unsigned int data)
+{
+       return regmap_update_bits(pchip->regmap, reg, mask, data);
+}
+
+/* initialize chip */
+static int lm3630a_chip_init(struct lm3630a_chip *pchip)
+{
+       int rval;
+       struct lm3630a_platform_data *pdata = pchip->pdata;
+
+       usleep_range(1000, 2000);
+       /* set Filter Strength Register */
+       rval = lm3630a_write(pchip, 0x50, 0x03);
+       /* set Cofig. register */
+       rval |= lm3630a_update(pchip, REG_CONFIG, 0x07, pdata->pwm_ctrl);
+       /* set boost control */
+       rval |= lm3630a_write(pchip, REG_BOOST, 0x38);
+       /* set current A */
+       rval |= lm3630a_update(pchip, REG_I_A, 0x1F, 0x1F);
+       /* set current B */
+       rval |= lm3630a_write(pchip, REG_I_B, 0x1F);
+       /* set control */
+       rval |=
+           lm3630a_write(pchip, REG_CTRL, pdata->leda_ctrl | pdata->ledb_ctrl);
+       usleep_range(1000, 2000);
+       /* set brightness A and B */
+       rval |= lm3630a_write(pchip, REG_BRT_A, pdata->leda_init_brt);
+       rval |= lm3630a_write(pchip, REG_BRT_B, pdata->ledb_init_brt);
+
+       if (rval < 0)
+               dev_err(pchip->dev, "i2c failed to access register\n");
+       return rval;
+}
+
+/* interrupt handling */
+static void lm3630a_delayed_func(struct work_struct *work)
+{
+       unsigned int rval;
+       struct lm3630a_chip *pchip;
+
+       pchip = container_of(work, struct lm3630a_chip, work.work);
+
+       rval = lm3630a_read(pchip, REG_INT_STATUS);
+       if (rval < 0) {
+               dev_err(pchip->dev,
+                       "i2c failed to access REG_INT_STATUS Register\n");
+               return;
+       }
+
+       dev_info(pchip->dev, "REG_INT_STATUS Register is 0x%x\n", rval);
+}
+
+static irqreturn_t lm3630a_isr_func(int irq, void *chip)
+{
+       int rval;
+       struct lm3630a_chip *pchip = chip;
+       unsigned long delay = msecs_to_jiffies(INT_DEBOUNCE_MSEC);
+
+       queue_delayed_work(pchip->irqthread, &pchip->work, delay);
+
+       rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
+       if (rval < 0) {
+               dev_err(pchip->dev, "i2c failed to access register\n");
+               return IRQ_NONE;
+       }
+       return IRQ_HANDLED;
+}
+
+static int lm3630a_intr_config(struct lm3630a_chip *pchip)
+{
+       int rval;
+
+       rval = lm3630a_write(pchip, REG_INT_EN, 0x87);
+       if (rval < 0)
+               return rval;
+
+       INIT_DELAYED_WORK(&pchip->work, lm3630a_delayed_func);
+       pchip->irqthread = create_singlethread_workqueue("lm3630a-irqthd");
+       if (!pchip->irqthread) {
+               dev_err(pchip->dev, "create irq thread fail\n");
+               return -ENOMEM;
+       }
+       if (request_threaded_irq
+           (pchip->irq, NULL, lm3630a_isr_func,
+            IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "lm3630a_irq", pchip)) {
+               dev_err(pchip->dev, "request threaded irq fail\n");
+               return -ENOMEM;
+       }
+       return rval;
+}
+
+static void lm3630a_pwm_ctrl(struct lm3630a_chip *pchip, int br, int br_max)
+{
+       unsigned int period = pwm_get_period(pchip->pwmd);
+       unsigned int duty = br * period / br_max;
+
+       pwm_config(pchip->pwmd, duty, period);
+       if (duty)
+               pwm_enable(pchip->pwmd);
+       else
+               pwm_disable(pchip->pwmd);
+}
+
+/* update and get brightness */
+static int lm3630a_bank_a_update_status(struct backlight_device *bl)
+{
+       int ret;
+       struct lm3630a_chip *pchip = bl_get_data(bl);
+       enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
+
+       /* pwm control */
+       if ((pwm_ctrl & LM3630A_PWM_BANK_A) != 0) {
+               lm3630a_pwm_ctrl(pchip, bl->props.brightness,
+                                bl->props.max_brightness);
+               return bl->props.brightness;
+       }
+
+       /* disable sleep */
+       ret = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
+       if (ret < 0)
+               goto out_i2c_err;
+       usleep_range(1000, 2000);
+       /* minimum brightness is 0x04 */
+       ret = lm3630a_write(pchip, REG_BRT_A, bl->props.brightness);
+       if (bl->props.brightness < 0x4)
+               ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDA_ENABLE, 0);
+       else
+               ret |= lm3630a_update(pchip, REG_CTRL,
+                                     LM3630A_LEDA_ENABLE, LM3630A_LEDA_ENABLE);
+       if (ret < 0)
+               goto out_i2c_err;
+       return bl->props.brightness;
+
+out_i2c_err:
+       dev_err(pchip->dev, "i2c failed to access\n");
+       return bl->props.brightness;
+}
+
+static int lm3630a_bank_a_get_brightness(struct backlight_device *bl)
+{
+       int brightness, rval;
+       struct lm3630a_chip *pchip = bl_get_data(bl);
+       enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
+
+       if ((pwm_ctrl & LM3630A_PWM_BANK_A) != 0) {
+               rval = lm3630a_read(pchip, REG_PWM_OUTHIGH);
+               if (rval < 0)
+                       goto out_i2c_err;
+               brightness = (rval & 0x01) << 8;
+               rval = lm3630a_read(pchip, REG_PWM_OUTLOW);
+               if (rval < 0)
+                       goto out_i2c_err;
+               brightness |= rval;
+               goto out;
+       }
+
+       /* disable sleep */
+       rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
+       if (rval < 0)
+               goto out_i2c_err;
+       usleep_range(1000, 2000);
+       rval = lm3630a_read(pchip, REG_BRT_A);
+       if (rval < 0)
+               goto out_i2c_err;
+       brightness = rval;
+
+out:
+       bl->props.brightness = brightness;
+       return bl->props.brightness;
+out_i2c_err:
+       dev_err(pchip->dev, "i2c failed to access register\n");
+       return 0;
+}
+
+static const struct backlight_ops lm3630a_bank_a_ops = {
+       .options = BL_CORE_SUSPENDRESUME,
+       .update_status = lm3630a_bank_a_update_status,
+       .get_brightness = lm3630a_bank_a_get_brightness,
+};
+
+/* update and get brightness */
+static int lm3630a_bank_b_update_status(struct backlight_device *bl)
+{
+       int ret;
+       struct lm3630a_chip *pchip = bl_get_data(bl);
+       enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
+
+       /* pwm control */
+       if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0) {
+               lm3630a_pwm_ctrl(pchip, bl->props.brightness,
+                                bl->props.max_brightness);
+               return bl->props.brightness;
+       }
+
+       /* disable sleep */
+       ret = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
+       if (ret < 0)
+               goto out_i2c_err;
+       usleep_range(1000, 2000);
+       /* minimum brightness is 0x04 */
+       ret = lm3630a_write(pchip, REG_BRT_B, bl->props.brightness);
+       if (bl->props.brightness < 0x4)
+               ret |= lm3630a_update(pchip, REG_CTRL, LM3630A_LEDB_ENABLE, 0);
+       else
+               ret |= lm3630a_update(pchip, REG_CTRL,
+                                     LM3630A_LEDB_ENABLE, LM3630A_LEDB_ENABLE);
+       if (ret < 0)
+               goto out_i2c_err;
+       return bl->props.brightness;
+
+out_i2c_err:
+       dev_err(pchip->dev, "i2c failed to access REG_CTRL\n");
+       return bl->props.brightness;
+}
+
+static int lm3630a_bank_b_get_brightness(struct backlight_device *bl)
+{
+       int brightness, rval;
+       struct lm3630a_chip *pchip = bl_get_data(bl);
+       enum lm3630a_pwm_ctrl pwm_ctrl = pchip->pdata->pwm_ctrl;
+
+       if ((pwm_ctrl & LM3630A_PWM_BANK_B) != 0) {
+               rval = lm3630a_read(pchip, REG_PWM_OUTHIGH);
+               if (rval < 0)
+                       goto out_i2c_err;
+               brightness = (rval & 0x01) << 8;
+               rval = lm3630a_read(pchip, REG_PWM_OUTLOW);
+               if (rval < 0)
+                       goto out_i2c_err;
+               brightness |= rval;
+               goto out;
+       }
+
+       /* disable sleep */
+       rval = lm3630a_update(pchip, REG_CTRL, 0x80, 0x00);
+       if (rval < 0)
+               goto out_i2c_err;
+       usleep_range(1000, 2000);
+       rval = lm3630a_read(pchip, REG_BRT_B);
+       if (rval < 0)
+               goto out_i2c_err;
+       brightness = rval;
+
+out:
+       bl->props.brightness = brightness;
+       return bl->props.brightness;
+out_i2c_err:
+       dev_err(pchip->dev, "i2c failed to access register\n");
+       return 0;
+}
+
+static const struct backlight_ops lm3630a_bank_b_ops = {
+       .options = BL_CORE_SUSPENDRESUME,
+       .update_status = lm3630a_bank_b_update_status,
+       .get_brightness = lm3630a_bank_b_get_brightness,
+};
+
+static int lm3630a_backlight_register(struct lm3630a_chip *pchip)
+{
+       struct backlight_properties props;
+       struct lm3630a_platform_data *pdata = pchip->pdata;
+
+       props.type = BACKLIGHT_RAW;
+       if (pdata->leda_ctrl != LM3630A_LEDA_DISABLE) {
+               props.brightness = pdata->leda_init_brt;
+               props.max_brightness = pdata->leda_max_brt;
+               pchip->bleda =
+                   devm_backlight_device_register(pchip->dev, "lm3630a_leda",
+                                                  pchip->dev, pchip,
+                                                  &lm3630a_bank_a_ops, &props);
+               if (IS_ERR(pchip->bleda))
+                       return PTR_ERR(pchip->bleda);
+       }
+
+       if ((pdata->ledb_ctrl != LM3630A_LEDB_DISABLE) &&
+           (pdata->ledb_ctrl != LM3630A_LEDB_ON_A)) {
+               props.brightness = pdata->ledb_init_brt;
+               props.max_brightness = pdata->ledb_max_brt;
+               pchip->bledb =
+                   devm_backlight_device_register(pchip->dev, "lm3630a_ledb",
+                                                  pchip->dev, pchip,
+                                                  &lm3630a_bank_b_ops, &props);
+               if (IS_ERR(pchip->bledb))
+                       return PTR_ERR(pchip->bledb);
+       }
+       return 0;
+}
+
+static const struct regmap_config lm3630a_regmap = {
+       .reg_bits = 8,
+       .val_bits = 8,
+       .max_register = REG_MAX,
+};
+
+static int lm3630a_probe(struct i2c_client *client,
+                        const struct i2c_device_id *id)
+{
+       struct lm3630a_platform_data *pdata = client->dev.platform_data;
+       struct lm3630a_chip *pchip;
+       int rval;
+
+       if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+               dev_err(&client->dev, "fail : i2c functionality check\n");
+               return -EOPNOTSUPP;
+       }
+
+       pchip = devm_kzalloc(&client->dev, sizeof(struct lm3630a_chip),
+                            GFP_KERNEL);
+       if (!pchip)
+               return -ENOMEM;
+       pchip->dev = &client->dev;
+
+       pchip->regmap = devm_regmap_init_i2c(client, &lm3630a_regmap);
+       if (IS_ERR(pchip->regmap)) {
+               rval = PTR_ERR(pchip->regmap);
+               dev_err(&client->dev, "fail : allocate reg. map: %d\n", rval);
+               return rval;
+       }
+
+       i2c_set_clientdata(client, pchip);
+       if (pdata == NULL) {
+               pchip->pdata = devm_kzalloc(pchip->dev,
+                                           sizeof(struct
+                                                  lm3630a_platform_data),
+                                           GFP_KERNEL);
+               if (pchip->pdata == NULL)
+                       return -ENOMEM;
+               /* default values */
+               pchip->pdata->leda_ctrl = LM3630A_LEDA_ENABLE;
+               pchip->pdata->ledb_ctrl = LM3630A_LEDB_ENABLE;
+               pchip->pdata->leda_max_brt = LM3630A_MAX_BRIGHTNESS;
+               pchip->pdata->ledb_max_brt = LM3630A_MAX_BRIGHTNESS;
+               pchip->pdata->leda_init_brt = LM3630A_MAX_BRIGHTNESS;
+               pchip->pdata->ledb_init_brt = LM3630A_MAX_BRIGHTNESS;
+       } else {
+               pchip->pdata = pdata;
+       }
+       /* chip initialize */
+       rval = lm3630a_chip_init(pchip);
+       if (rval < 0) {
+               dev_err(&client->dev, "fail : init chip\n");
+               return rval;
+       }
+       /* backlight register */
+       rval = lm3630a_backlight_register(pchip);
+       if (rval < 0) {
+               dev_err(&client->dev, "fail : backlight register.\n");
+               return rval;
+       }
+       /* pwm */
+       if (pdata->pwm_ctrl != LM3630A_PWM_DISABLE) {
+               pchip->pwmd = devm_pwm_get(pchip->dev, "lm3630a-pwm");
+               if (IS_ERR(pchip->pwmd)) {
+                       dev_err(&client->dev, "fail : get pwm device\n");
+                       return PTR_ERR(pchip->pwmd);
+               }
+       }
+       pchip->pwmd->period = pdata->pwm_period;
+
+       /* interrupt enable  : irq 0 is not allowed */
+       pchip->irq = client->irq;
+       if (pchip->irq) {
+               rval = lm3630a_intr_config(pchip);
+               if (rval < 0)
+                       return rval;
+       }
+       dev_info(&client->dev, "LM3630A backlight register OK.\n");
+       return 0;
+}
+
+static int lm3630a_remove(struct i2c_client *client)
+{
+       int rval;
+       struct lm3630a_chip *pchip = i2c_get_clientdata(client);
+
+       rval = lm3630a_write(pchip, REG_BRT_A, 0);
+       if (rval < 0)
+               dev_err(pchip->dev, "i2c failed to access register\n");
+
+       rval = lm3630a_write(pchip, REG_BRT_B, 0);
+       if (rval < 0)
+               dev_err(pchip->dev, "i2c failed to access register\n");
+
+       if (pchip->irq) {
+               free_irq(pchip->irq, pchip);
+               flush_workqueue(pchip->irqthread);
+               destroy_workqueue(pchip->irqthread);
+       }
+       return 0;
+}
+
+static const struct i2c_device_id lm3630a_id[] = {
+       {LM3630A_NAME, 0},
+       {}
+};
+
+MODULE_DEVICE_TABLE(i2c, lm3630a_id);
+
+static struct i2c_driver lm3630a_i2c_driver = {
+       .driver = {
+                  .name = LM3630A_NAME,
+                  },
+       .probe = lm3630a_probe,
+       .remove = lm3630a_remove,
+       .id_table = lm3630a_id,
+};
+
+module_i2c_driver(lm3630a_i2c_driver);
+
+MODULE_DESCRIPTION("Texas Instruments Backlight driver for LM3630A");
+MODULE_AUTHOR("Daniel Jeong <gshark.jeong@gmail.com>");
+MODULE_AUTHOR("LDD MLP <ldd-mlp@list.ti.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/platform_data/lm3630_bl.h b/include/linux/platform_data/lm3630_bl.h
deleted file mode 100644 (file)
index 9176dd3..0000000
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
-* Simple driver for Texas Instruments LM3630 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.
-*
-*/
-
-#ifndef __LINUX_LM3630_H
-#define __LINUX_LM3630_H
-
-#define LM3630_NAME "lm3630_bl"
-
-enum lm3630_pwm_ctrl {
-       PWM_CTRL_DISABLE = 0,
-       PWM_CTRL_BANK_A,
-       PWM_CTRL_BANK_B,
-       PWM_CTRL_BANK_ALL,
-};
-
-enum lm3630_pwm_active {
-       PWM_ACTIVE_HIGH = 0,
-       PWM_ACTIVE_LOW,
-};
-
-enum lm3630_bank_a_ctrl {
-       BANK_A_CTRL_DISABLE = 0x0,
-       BANK_A_CTRL_LED1 = 0x4,
-       BANK_A_CTRL_LED2 = 0x1,
-       BANK_A_CTRL_ALL = 0x5,
-};
-
-enum lm3630_bank_b_ctrl {
-       BANK_B_CTRL_DISABLE = 0,
-       BANK_B_CTRL_LED2,
-};
-
-struct lm3630_platform_data {
-
-       /* maximum brightness */
-       int max_brt_led1;
-       int max_brt_led2;
-
-       /* initial on brightness */
-       int init_brt_led1;
-       int init_brt_led2;
-       enum lm3630_pwm_ctrl pwm_ctrl;
-       enum lm3630_pwm_active pwm_active;
-       enum lm3630_bank_a_ctrl bank_a_ctrl;
-       enum lm3630_bank_b_ctrl bank_b_ctrl;
-       unsigned int pwm_period;
-       void (*pwm_set_intensity) (int brightness, int max_brightness);
-};
-
-#endif /* __LINUX_LM3630_H */
diff --git a/include/linux/platform_data/lm3630a_bl.h b/include/linux/platform_data/lm3630a_bl.h
new file mode 100644 (file)
index 0000000..7538e38
--- /dev/null
@@ -0,0 +1,65 @@
+/*
+* Simple driver for Texas Instruments LM3630A 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.
+*
+*/
+
+#ifndef __LINUX_LM3630A_H
+#define __LINUX_LM3630A_H
+
+#define LM3630A_NAME "lm3630a_bl"
+
+enum lm3630a_pwm_ctrl {
+       LM3630A_PWM_DISABLE = 0x00,
+       LM3630A_PWM_BANK_A,
+       LM3630A_PWM_BANK_B,
+       LM3630A_PWM_BANK_ALL,
+       LM3630A_PWM_BANK_A_ACT_LOW = 0x05,
+       LM3630A_PWM_BANK_B_ACT_LOW,
+       LM3630A_PWM_BANK_ALL_ACT_LOW,
+};
+
+enum lm3630a_leda_ctrl {
+       LM3630A_LEDA_DISABLE = 0x00,
+       LM3630A_LEDA_ENABLE = 0x04,
+       LM3630A_LEDA_ENABLE_LINEAR = 0x14,
+};
+
+enum lm3630a_ledb_ctrl {
+       LM3630A_LEDB_DISABLE = 0x00,
+       LM3630A_LEDB_ON_A = 0x01,
+       LM3630A_LEDB_ENABLE = 0x02,
+       LM3630A_LEDB_ENABLE_LINEAR = 0x0A,
+};
+
+#define LM3630A_MAX_BRIGHTNESS 255
+/*
+ *@leda_init_brt : led a init brightness. 4~255
+ *@leda_max_brt  : led a max brightness.  4~255
+ *@leda_ctrl     : led a disable, enable linear, enable exponential
+ *@ledb_init_brt : led b init brightness. 4~255
+ *@ledb_max_brt  : led b max brightness.  4~255
+ *@ledb_ctrl     : led b disable, enable linear, enable exponential
+ *@pwm_period    : pwm period
+ *@pwm_ctrl      : pwm disable, bank a or b, active high or low
+ */
+struct lm3630a_platform_data {
+
+       /* led a config.  */
+       int leda_init_brt;
+       int leda_max_brt;
+       enum lm3630a_leda_ctrl leda_ctrl;
+       /* led b config. */
+       int ledb_init_brt;
+       int ledb_max_brt;
+       enum lm3630a_ledb_ctrl ledb_ctrl;
+       /* pwm config. */
+       unsigned int pwm_period;
+       enum lm3630a_pwm_ctrl pwm_ctrl;
+};
+
+#endif /* __LINUX_LM3630A_H */