Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964866Ab3IEClx (ORCPT ); Wed, 4 Sep 2013 22:41:53 -0400 Received: from mailout4.samsung.com ([203.254.224.34]:56128 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761317Ab3IEClv (ORCPT ); Wed, 4 Sep 2013 22:41:51 -0400 X-AuditID: cbfee691-b7f4a6d0000074fc-12-5227ef6da697 From: Jingoo Han To: "'Andrew Morton'" Cc: linux-kernel@vger.kernel.org, "'Richard Purdie'" , "'Milo Kim'" , "'Daniel Jeong'" , "'Jingoo Han'" References: <002101cea9e1$34a38330$9dea8990$%han@samsung.com> In-reply-to: <002101cea9e1$34a38330$9dea8990$%han@samsung.com> Subject: [PATCH 2/6] backlight: lm3630: apply chip revision Date: Thu, 05 Sep 2013 11:41:49 +0900 Message-id: <002301cea9e1$787ff2f0$697fd8d0$%han@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-index: Ac6p4TRpKe++09SiQwq9N1m2ivIIowAACumA Content-language: ko X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrCIsWRmVeSWpSXmKPExsVy+t8zY93c9+pBBtd/G1rMWb+GzWLy7i5W i8sLLwGJXXPYLJb/WsdisXvXU1YHNo+ds+6ye5yY8ZvFY8/8H6wefVtWMXocv7GdyePzJrkA tigum5TUnMyy1CJ9uwSujMV737AWXGxhqlh6exl7A+PUa4xdjJwcEgImEo1LmpggbDGJC/fW s3UxcnEICSxjlOg6fZkNpuhtWwcTRGIRo8S+Z39YIZxfjBInTl9nBaliE1CT+PLlMHsXIweH iIC+RFuLBkgNs8BWRonNH3eD1QgJ2EqcXzIbbCqngJ3Epx97wc4QFrCWeHttCpjNIqAqceT9 XLB6XqD6e5ffsEHYghI/Jt9jAbGZBbQk1u88zgRhy0tsXvOWGWSvhIC6xKO/uiBhEQEjibMn TrFBlIhI7HvxjhHkHgmBj+wS6x+8gNolIPFt8iEWiF5ZiU0HmCEelpQ4uOIGywRGiVlINs9C snkWks2zkKxYwMiyilE0tSC5oDgpvchUrzgxt7g0L10vOT93EyMkhifuYLx/wPoQYzLQ+onM UqLJ+cAUkFcSb2hsZmRhamJqbGRuaUaasJI4r3qLdaCQQHpiSWp2ampBalF8UWlOavEhRiYO TqkGRlmv9UujJi2SPV5zsdb8SP3awOQF3MwPnJz2ha6xVttd9UGIOWfDwcjMt089XrH5au0R MFLcN7ez7b2VwLXcF3veeF99xbzpsfqnFUvXButel5ZKOXz7e2rWnekSC+/xfL3OxLSl+OkC w3+Ca5988tarvzYzYb5DDttM/YPndTZni33PFQ/uC1RiKc5INNRiLipOBAAuDOjg9wIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrIKsWRmVeSWpSXmKPExsVy+t9jAd3c9+pBBjfWaVrMWb+GzWLy7i5W i8sLLwGJXXPYLJb/WsdisXvXU1YHNo+ds+6ye5yY8ZvFY8/8H6wefVtWMXocv7GdyePzJrkA tqgGRpuM1MSU1CKF1Lzk/JTMvHRbJe/geOd4UzMDQ11DSwtzJYW8xNxUWyUXnwBdt8wcoDuU FMoSc0qBQgGJxcVK+naYJoSGuOlawDRG6PqGBMH1GBmggYR1jBmL975hLbjYwlSx9PYy9gbG qdcYuxg5OSQETCTetnUwQdhiEhfurWfrYuTiEBJYxCix79kfVgjnF6PEidPXWUGq2ATUJL58 OczexcjBISKgL9HWogFSwyywlVFi88fdYDVCArYS55fMZgOxOQXsJD792Au2TVjAWuLttSlg NouAqsSR93PB6nmB6u9dfsMGYQtK/Jh8jwXEZhbQkli/8zgThC0vsXnNW2aQvRIC6hKP/uqC hEUEjCTOnjjFBlEiIrHvxTvGCYxCs5BMmoVk0iwkk2YhaVnAyLKKUTS1ILmgOCk910ivODG3 uDQvXS85P3cTIzhBPJPewbiqweIQowAHoxIPb4OxepAQa2JZcWXuIUYJDmYlEV6LlUAh3pTE yqrUovz4otKc1OJDjMlAj05klhJNzgcmr7ySeENjEzMjSyMzCyMTc3PShJXEeQ+2WgcKCaQn lqRmp6YWpBbBbGHi4JRqYKz3rS6tVWr7cjvYIOGx0pS/97+f13zl+4DBLOimnv6cu26KOu91 pvsu0Iy9uP/Q8lL19GMbOctX75h2zijpZ+b3boaiZZZvJHMOyz3U/9emfCs4zTFrgSVrbVRd 784TXEe+HluySHo5w9PnAf3J8zvVb/3tF+kSWVZ7/1jXTV3nOaJ89n1u5UosxRmJhlrMRcWJ AM9qlrlUAwAA DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 32445 Lines: 1166 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 --- drivers/video/backlight/Kconfig | 6 +- drivers/video/backlight/Makefile | 2 +- drivers/video/backlight/lm3630_bl.c | 475 ----------------------------- drivers/video/backlight/lm3630a_bl.c | 483 ++++++++++++++++++++++++++++++ include/linux/platform_data/lm3630_bl.h | 57 ---- include/linux/platform_data/lm3630a_bl.h | 65 ++++ 6 files changed, 552 insertions(+), 536 deletions(-) delete mode 100644 drivers/video/backlight/lm3630_bl.c create mode 100644 drivers/video/backlight/lm3630a_bl.c delete mode 100644 include/linux/platform_data/lm3630_bl.h create mode 100644 include/linux/platform_data/lm3630a_bl.h diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index a65dd06..5a3eb2e 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -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" diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 38e1bab..bb82002 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -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 index 76a62e9..0000000 --- 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#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, ®_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, ®_val); - if (ret < 0) - goto out; - brightness = reg_val & 0x01; - ret = regmap_read(pchip->regmap, REG_PWM_OUTLOW, ®_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, ®_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, ®_val); - if (ret < 0) - goto out; - brightness = reg_val & 0x01; - ret = regmap_read(pchip->regmap, REG_PWM_OUTLOW, ®_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, ®_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 "); -MODULE_AUTHOR("Daniel Jeong "); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/video/backlight/lm3630a_bl.c b/drivers/video/backlight/lm3630a_bl.c new file mode 100644 index 0000000..cf40cc8 --- /dev/null +++ b/drivers/video/backlight/lm3630a_bl.c @@ -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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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, ®_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 "); +MODULE_AUTHOR("LDD MLP "); +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 index 9176dd3..0000000 --- a/include/linux/platform_data/lm3630_bl.h +++ /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 index 0000000..7538e38 --- /dev/null +++ b/include/linux/platform_data/lm3630a_bl.h @@ -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 */ -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/