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path: root/drivers/video/backlight/lm3630_bl.c
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Diffstat (limited to 'drivers/video/backlight/lm3630_bl.c')
-rw-r--r--drivers/video/backlight/lm3630_bl.c475
1 files changed, 0 insertions, 475 deletions
diff --git a/drivers/video/backlight/lm3630_bl.c b/drivers/video/backlight/lm3630_bl.c
deleted file mode 100644
index 76a62e978fc3..000000000000
--- a/drivers/video/backlight/lm3630_bl.c
+++ /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");