diff options
Diffstat (limited to 'drivers/video/backlight')
| -rw-r--r-- | drivers/video/backlight/Kconfig | 41 | ||||
| -rw-r--r-- | drivers/video/backlight/Makefile | 7 | ||||
| -rw-r--r-- | drivers/video/backlight/da9052_bl.c | 439 | ||||
| -rw-r--r-- | drivers/video/backlight/mxc_ipu_bl.c | 158 | ||||
| -rw-r--r-- | drivers/video/backlight/mxc_lcdc_bl.c | 164 | ||||
| -rw-r--r-- | drivers/video/backlight/mxc_mc13892_bl.c | 180 | ||||
| -rw-r--r-- | drivers/video/backlight/mxc_pmic_bl.c | 200 | ||||
| -rw-r--r-- | drivers/video/backlight/mxs_bl.c | 387 | ||||
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 10 | ||||
| -rw-r--r-- | drivers/video/backlight/wm8350_bl.c | 299 |
10 files changed, 1885 insertions, 0 deletions
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index e54a337227ea..78c4649a48f8 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -168,6 +168,14 @@ config BACKLIGHT_GENERIC known as the Corgi backlight driver. If you have a Sharp Zaurus SL-C7xx, SL-Cxx00 or SL-6000x say y. +config BACKLIGHT_DA9052 + tristate "Dialog DA9052 WLED" + depends on PMIC_DA9052 + help + Enable the DA9052 Backlight Driver + + To compile this driver as a module, choose M here. + config BACKLIGHT_LOCOMO tristate "Sharp LOCOMO LCD/Backlight Driver" depends on SHARP_LOCOMO @@ -307,6 +315,39 @@ config BACKLIGHT_PCF50633 If you have a backlight driven by a NXP PCF50633 MFD, say Y here to enable its driver. +config BACKLIGHT_MXC_IPU + tristate "IPU PWM Backlight Driver" + depends on MXC_IPU_V1 + default y + +config BACKLIGHT_MXC_LCDC + tristate "LCDC PWM Backlight Driver" + depends on (ARCH_MX21 || ARCH_MX27 || ARCH_MX25) + default y + +config BACKLIGHT_MXC_PMIC + tristate "PMIC Backlight Driver" + depends on MXC_MC13783_LIGHT + depends on MXC_MC13783_POWER + default y + +config BACKLIGHT_MXC_MC13892 + tristate "Mc13892 Backlight Driver" + depends on MXC_MC13892_LIGHT + default y + +config BACKLIGHT_MXS + tristate "Freescale MXS Backlight Driver" + depends on ARCH_MXS + default y + help + If you have a MXS, say y to enable the backlight driver. + +config BACKLIGHT_WM8350 + tristate "WM8350 Backlight Driver" + depends on REGULATOR_WM8350 + default y + endif # BACKLIGHT_CLASS_DEVICE endif # BACKLIGHT_LCD_SUPPORT diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 44c0f81ad85d..1c67fdedc17e 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_LCD_CLASS_DEVICE) += lcd.o obj-$(CONFIG_LCD_CORGI) += corgi_lcd.o +obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o obj-$(CONFIG_LCD_HP700) += jornada720_lcd.o obj-$(CONFIG_LCD_L4F00242T03) += l4f00242t03.o obj-$(CONFIG_LCD_LMS283GF05) += lms283gf05.o @@ -36,3 +37,9 @@ obj-$(CONFIG_BACKLIGHT_ADP8860) += adp8860_bl.o obj-$(CONFIG_BACKLIGHT_88PM860X) += 88pm860x_bl.o obj-$(CONFIG_BACKLIGHT_PCF50633) += pcf50633-backlight.o +obj-$(CONFIG_BACKLIGHT_MXC_LCDC) += mxc_lcdc_bl.o +obj-$(CONFIG_BACKLIGHT_MXC_IPU) += mxc_ipu_bl.o +obj-$(CONFIG_BACKLIGHT_MXC_PMIC) += mxc_pmic_bl.o +obj-$(CONFIG_BACKLIGHT_WM8350) += wm8350_bl.o +obj-$(CONFIG_BACKLIGHT_MXC_MC13892) += mxc_mc13892_bl.o +obj-$(CONFIG_BACKLIGHT_MXS) += mxs_bl.o diff --git a/drivers/video/backlight/da9052_bl.c b/drivers/video/backlight/da9052_bl.c new file mode 100644 index 000000000000..5cfcb471d337 --- /dev/null +++ b/drivers/video/backlight/da9052_bl.c @@ -0,0 +1,439 @@ +/* + * Copyright(c) 2009 Dialog Semiconductor Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * da9052_bl.c: Backlight driver for DA9052 + */ + +#include <linux/platform_device.h> +#include <linux/fb.h> +#include <linux/backlight.h> + +#include <linux/mfd/da9052/da9052.h> +#include <linux/mfd/da9052/reg.h> +#include <linux/mfd/da9052/bl.h> + + +#define DRIVER_NAME "da9052-backlight" +#define DRIVER_NAME1 "WLED-1" +#define DRIVER_NAME2 "WLED-2" +#define DRIVER_NAME3 "WLED-3" + +/* These flags define if Backlight LEDs are present */ +/* Set the following macros to 1, if LEDs are present. Otherwise set to 0 */ +#define DA9052_LED1_PRESENT 1 +#define DA9052_LED2_PRESENT 1 +#define DA9052_LED3_PRESENT 1 + +#define DA9052_MAX_BRIGHTNESS 0xA0/*0xFF*/ + +struct da9052_backlight_data { + struct device *da9052_dev; + int current_brightness; + struct da9052 *da9052; + + int is_led1_present; + int is_led2_present; + int is_led3_present; +}; + +enum da9052_led_number { + LED1 = 1, + LED2, + LED3, +}; + +static int da9052_backlight_brightness_set(struct da9052_backlight_data *data, + int brightness, enum da9052_led_number led) +{ + /* + * Mechanism for brightness control: + * For brightness control, current is used. + * PWM feature is not used. + * To use PWM feature, a fixed value of current should be defined. + */ + + int ret = 0; + + unsigned int led_ramp_bit; + unsigned int led_current_register; + unsigned int led_current_sink_bit; + unsigned int led_boost_en_bit; + + struct da9052_ssc_msg msg; + + switch (led) { + case LED1: + led_ramp_bit = DA9052_LEDCONT_LED1RAMP; + led_current_register = DA9052_LED1CONF_REG; + led_current_sink_bit = DA9052_LEDCONT_LED1EN; + led_boost_en_bit = DA9052_BOOST_LED1INEN; + break; + case LED2: + led_ramp_bit = DA9052_LEDCONT_LED2RAMP; + led_current_register = DA9052_LED2CONF_REG; + led_current_sink_bit = DA9052_LEDCONT_LED2EN; + led_boost_en_bit = DA9052_BOOST_LED2INEN; + break; + case LED3: + led_ramp_bit = DA9052_LEDCONT_LED3RAMP; + led_current_register = DA9052_LED3CONF_REG; + led_current_sink_bit = DA9052_LEDCONT_LED3EN; + led_boost_en_bit = DA9052_BOOST_LED3INEN; + break; + default: + return -EIO; + } + + /* + * 3 registers to be written + * 1. LED current for brightness + * 2. LED enable/disable depending on the brightness + * 3. BOOST enable/disable depending on the brightness + */ + + /* Configure LED current i.e. brightness */ + msg.addr = led_current_register; + msg.data = brightness; + /* Write to the DA9052 register */ + da9052_lock(data->da9052); + ret = data->da9052->write(data->da9052, &msg); + if (ret) { + da9052_unlock(data->da9052); + return ret; + } + da9052_unlock(data->da9052); + + /* + * Check if brightness = 0 + * and decide if led to be disabled + */ + msg.addr = DA9052_LEDCONT_REG; + msg.data = 0; + + /* Read LED_CONT register */ + da9052_lock(data->da9052); + ret = data->da9052->read(data->da9052, &msg); + if (ret) { + da9052_unlock(data->da9052); + return ret; + } + da9052_unlock(data->da9052); + + /* Set/Clear the LED current sink bit */ + msg.data = brightness ? (msg.data | led_current_sink_bit) : + (msg.data & ~(led_current_sink_bit)); + /* Disable current ramping */ + msg.data = (msg.data & ~(led_ramp_bit)); + + /* Write to the DA9052 register */ + da9052_lock(data->da9052); + ret = data->da9052->write(data->da9052, &msg); + if (ret) { + da9052_unlock(data->da9052); + return ret; + } + da9052_unlock(data->da9052); + + /* Configure BOOST */ + msg.addr = DA9052_BOOST_REG; + msg.data = 0; + + /* Read LED_CONT register */ + da9052_lock(data->da9052); + ret = data->da9052->read(data->da9052, &msg); + if (ret) { + da9052_unlock(data->da9052); + return ret; + } + da9052_unlock(data->da9052); + + /* Set/Clear the LED BOOST enable bit */ + msg.data = brightness ? (msg.data | led_boost_en_bit) : + (msg.data & ~(led_boost_en_bit)); + /* Set/Clear the BOOST converter enable bit */ + + if (0 == (data->is_led1_present | data->is_led2_present | + data->is_led3_present)) { + msg.data = msg.data & ~(DA9052_BOOST_BOOSTEN); + } else + msg.data = (msg.data | DA9052_BOOST_BOOSTEN); + + /* Write to the DA9052 register */ + da9052_lock(data->da9052); + ret = data->da9052->write(data->da9052, &msg); + if (ret) { + da9052_unlock(data->da9052); + return ret; + } + da9052_unlock(data->da9052); + + return 0; +} + +static int da9052_backlight_set(struct backlight_device *bl, int brightness) +{ + struct da9052_backlight_data *data = bl_get_data(bl); + int ret = 0; + /* Check for LED1 */ + if (1 == data->is_led1_present) { + ret = da9052_backlight_brightness_set(data, brightness, LED1); + if (ret) + return ret; + } + /* Check for LED2 */ + if (1 == data->is_led2_present) { + ret = da9052_backlight_brightness_set(data, brightness, LED2); + if (ret) + return ret; + } + /* Check for LED3 */ + if (1 == data->is_led3_present) { + ret = da9052_backlight_brightness_set(data, brightness, LED3); + if (ret) + return ret; + } + + data->current_brightness = brightness; + return 0; +} + +static int da9052_backlight_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + return da9052_backlight_set(bl, brightness); +} + +static int da9052_backlight_get_brightness(struct backlight_device *bl) +{ + struct da9052_backlight_data *data = bl_get_data(bl); + return data->current_brightness; +} + +struct backlight_ops da9052_backlight_ops = { + .update_status = da9052_backlight_update_status, + .get_brightness = da9052_backlight_get_brightness, +}; + +static int da9052_backlight_probe1(struct platform_device *pdev) +{ + struct da9052_backlight_data *data; + struct backlight_device *bl; + struct backlight_properties props; + struct da9052 *da9052 = dev_get_drvdata(pdev->dev.parent); + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + data->da9052_dev = pdev->dev.parent; + data->da9052 = da9052; + data->current_brightness = 0; + + data->is_led1_present = DA9052_LED1_PRESENT; + + bl = backlight_device_register(pdev->name, data->da9052_dev, + data, &da9052_backlight_ops, &props); +#if 0 /* Commented to be integrated with 2.6.28 kernel */ + bl = backlight_device_register(pdev->name, data->da9052_dev, + data, &da9052_backlight_ops); +#endif + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + kfree(data); + return PTR_ERR(bl); + } + + bl->props.max_brightness = DA9052_MAX_BRIGHTNESS; + bl->props.brightness = 0; + bl->props.power = FB_BLANK_UNBLANK; + bl->props.fb_blank = FB_BLANK_UNBLANK; + platform_set_drvdata(pdev, bl); + + backlight_update_status(bl); + + /* + * NOTE: + * The default settings for DA9052 registers depends upon OTP values. + * E.g. The configuration of BOOST register, minimum value for LED + * current etc. are taken from OTP + */ + + return 0; +} +static int da9052_backlight_probe2(struct platform_device *pdev) +{ + struct da9052_backlight_data *data; + struct backlight_device *bl; + struct backlight_properties props; + struct da9052 *da9052 = dev_get_drvdata(pdev->dev.parent); + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + data->da9052_dev = pdev->dev.parent; + data->da9052 = da9052; + data->current_brightness = 0; + + data->is_led2_present = DA9052_LED2_PRESENT; + bl = backlight_device_register(pdev->name, data->da9052_dev, + data, &da9052_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + kfree(data); + return PTR_ERR(bl); + } + + bl->props.max_brightness = DA9052_MAX_BRIGHTNESS; + bl->props.brightness = 0; + bl->props.power = FB_BLANK_UNBLANK; + bl->props.fb_blank = FB_BLANK_UNBLANK; + platform_set_drvdata(pdev, bl); + + backlight_update_status(bl); + + /* + * NOTE: + * The default settings for DA9052 registers depends upon OTP values. + * E.g. The configuration of BOOST register, minimum value for LED + * current etc. are taken from OTP + */ + + return 0; +} +static int da9052_backlight_probe3(struct platform_device *pdev) +{ + struct da9052_backlight_data *data; + struct backlight_device *bl; + struct backlight_properties props; + + struct da9052 *da9052 = dev_get_drvdata(pdev->dev.parent); + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + data->da9052_dev = pdev->dev.parent; + data->da9052 = da9052; + data->current_brightness = 0; + + data->is_led3_present = DA9052_LED3_PRESENT; + bl = backlight_device_register(pdev->name, data->da9052_dev, + data, &da9052_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + kfree(data); + return PTR_ERR(bl); + } + + bl->props.max_brightness = DA9052_MAX_BRIGHTNESS; + bl->props.brightness = 0; + bl->props.power = FB_BLANK_UNBLANK; + bl->props.fb_blank = FB_BLANK_UNBLANK; + platform_set_drvdata(pdev, bl); + + backlight_update_status(bl); + + /* + * NOTE: + * The default settings for DA9052 registers depends upon OTP values. + * E.g. The configuration of BOOST register, minimum value for LED + * current etc. are taken from OTP + */ + + return 0; +} + +static int da9052_backlight_remove1(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + struct da9052_backlight_data *data = bl_get_data(bl); + + backlight_device_unregister(bl); + kfree(data); + return 0; +} + +static int da9052_backlight_remove2(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + struct da9052_backlight_data *data = bl_get_data(bl); + + backlight_device_unregister(bl); + kfree(data); + return 0; +} +static int da9052_backlight_remove3(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + struct da9052_backlight_data *data = bl_get_data(bl); + + backlight_device_unregister(bl); + kfree(data); + return 0; +} + +static struct platform_driver da9052_backlight_driver1 = { + .driver = { + .name = DRIVER_NAME1, + .owner = THIS_MODULE, + }, + .probe = da9052_backlight_probe1, + .remove = da9052_backlight_remove1, +}; +static struct platform_driver da9052_backlight_driver2 = { + .driver = { + .name = DRIVER_NAME2, + .owner = THIS_MODULE, + }, + .probe = da9052_backlight_probe2, + .remove = da9052_backlight_remove2, +}; +static struct platform_driver da9052_backlight_driver3 = { + .driver = { + .name = DRIVER_NAME3, + .owner = THIS_MODULE, + }, + .probe = da9052_backlight_probe3, + .remove = da9052_backlight_remove3, +}; + +static int __init da9052_backlight_init(void) +{ + s32 ret; + ret = platform_driver_register(&da9052_backlight_driver1); + if (ret) + return ret; + ret = platform_driver_register(&da9052_backlight_driver2); + if (ret) + return ret; + + ret = platform_driver_register(&da9052_backlight_driver3); + if (ret) + return ret; + + return ret; +} +module_init(da9052_backlight_init); + +static void __exit da9052_backlight_exit(void) +{ + platform_driver_unregister(&da9052_backlight_driver1); + platform_driver_unregister(&da9052_backlight_driver2); + platform_driver_unregister(&da9052_backlight_driver3); +} +module_exit(da9052_backlight_exit); + +MODULE_AUTHOR("Dialog Semiconductor Ltd <dchen@diasemi.com>"); +MODULE_DESCRIPTION("Backlight driver for Dialog DA9052 PMIC"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRIVER_NAME); + diff --git a/drivers/video/backlight/mxc_ipu_bl.c b/drivers/video/backlight/mxc_ipu_bl.c new file mode 100644 index 000000000000..fd6ea227989f --- /dev/null +++ b/drivers/video/backlight/mxc_ipu_bl.c @@ -0,0 +1,158 @@ +/* + * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ +/*! + * @defgroup IPU_BL MXC IPU Backlight Driver + */ +/*! + * @file mxc_ipu_bl.c + * + * @brief Backlight Driver for IPU PWM on Freescale MXC/i.MX platforms. + * + * This file contains API defined in include/linux/clk.h for setting up and + * retrieving clocks. + * + * Based on Sharp's Corgi Backlight Driver + * + * @ingroup IPU_BL + */ + +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/ipu.h> + +#define MXC_MAX_INTENSITY 255 +#define MXC_DEFAULT_INTENSITY 127 +#define MXC_INTENSITY_OFF 0 + +struct mxcbl_dev_data { + int intensity; +}; + +static int fb_id; + +static int mxcbl_send_intensity(struct backlight_device *bd) +{ + int intensity = bd->props.brightness; + struct mxcbl_dev_data *devdata = dev_get_drvdata(&bd->dev); + + if (bd->props.power != FB_BLANK_UNBLANK) + intensity = 0; + if (bd->props.fb_blank != FB_BLANK_UNBLANK) + intensity = 0; + + ipu_sdc_set_brightness(intensity); + + devdata->intensity = intensity; + return 0; +} + +static int mxcbl_get_intensity(struct backlight_device *bd) +{ + struct mxcbl_dev_data *devdata = dev_get_drvdata(&bd->dev); + return devdata->intensity; +} + +static int mxcbl_check_fb(struct backlight_device *bldev, struct fb_info *info) +{ + int id = info->fix.id[4] - '0'; + if (id == fb_id) { + if ((id == 3) && !strcmp(info->fix.id, "DISP3 FG")) { + return 0; + } + return 1; + } + return 0; +} + +static struct backlight_ops mxcbl_ops = { + .get_brightness = mxcbl_get_intensity, + .update_status = mxcbl_send_intensity, + .check_fb = mxcbl_check_fb, +}; + +static int __init mxcbl_probe(struct platform_device *pdev) +{ + struct backlight_device *bd; + struct mxcbl_dev_data *devdata; + struct backlight_properties props; + int ret = 0; + + devdata = kzalloc(sizeof(struct mxcbl_dev_data), GFP_KERNEL); + if (!devdata) + return -ENOMEM; + fb_id = (int)pdev->dev.platform_data; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.max_brightness = MXC_MAX_INTENSITY; + bd = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, devdata, + &mxcbl_ops, &props); + if (IS_ERR(bd)) { + ret = PTR_ERR(bd); + goto err0; + } + platform_set_drvdata(pdev, bd); + + bd->props.brightness = MXC_DEFAULT_INTENSITY; + bd->props.power = FB_BLANK_UNBLANK; + bd->props.fb_blank = FB_BLANK_UNBLANK; + backlight_update_status(bd); + + printk("MXC Backlight Device %s Initialized.\n", dev_name(&pdev->dev)); + return 0; + err0: + kfree(devdata); + return ret; +} + +static int mxcbl_remove(struct platform_device *pdev) +{ + struct backlight_device *bd = platform_get_drvdata(pdev); + + bd->props.brightness = MXC_INTENSITY_OFF; + backlight_update_status(bd); + + backlight_device_unregister(bd); + + return 0; +} + +static struct platform_driver mxcbl_driver = { + .probe = mxcbl_probe, + .remove = mxcbl_remove, + .driver = { + .name = "mxc_ipu_bl", + }, +}; + +static int __init mxcbl_init(void) +{ + return platform_driver_register(&mxcbl_driver); +} + +static void __exit mxcbl_exit(void) +{ + platform_driver_unregister(&mxcbl_driver); +} + +late_initcall(mxcbl_init); +module_exit(mxcbl_exit); + +MODULE_DESCRIPTION("Freescale MXC/i.MX IPU PWM Backlight Driver"); +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/mxc_lcdc_bl.c b/drivers/video/backlight/mxc_lcdc_bl.c new file mode 100644 index 000000000000..e49d72632290 --- /dev/null +++ b/drivers/video/backlight/mxc_lcdc_bl.c @@ -0,0 +1,164 @@ +/* + * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ +/*! + * @defgroup LCDC_BL MXC LCDC Backlight Driver + */ +/*! + * @file mxc_lcdc_bl.c + * + * @brief Backlight Driver for LCDC PWM on Freescale MXC/i.MX platforms. + * + * This file contains API defined in include/linux/clk.h for setting up and + * retrieving clocks. + * + * Based on Sharp's Corgi Backlight Driver + * + * @ingroup LCDC_BL + */ + +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/clk.h> + +#define MXC_MAX_INTENSITY 255 +#define MXC_DEFAULT_INTENSITY 127 +#define MXC_INTENSITY_OFF 0 + +extern void mx2fb_set_brightness(uint8_t); + +struct mxcbl_dev_data { + struct clk *clk; + int intensity; +}; + +static int mxcbl_send_intensity(struct backlight_device *bd) +{ + int intensity = bd->props.brightness; + struct mxcbl_dev_data *devdata = dev_get_drvdata(&bd->dev); + + if (bd->props.power != FB_BLANK_UNBLANK) + intensity = 0; + if (bd->props.fb_blank != FB_BLANK_UNBLANK) + intensity = 0; + + if ((devdata->intensity == 0) && (intensity != 0)) + clk_enable(devdata->clk); + + /* PWM contrast control register */ + mx2fb_set_brightness(intensity); + + if ((devdata->intensity != 0) && (intensity == 0)) + clk_disable(devdata->clk); + + devdata->intensity = intensity; + return 0; +} + +static int mxcbl_get_intensity(struct backlight_device *bd) +{ + struct mxcbl_dev_data *devdata = dev_get_drvdata(&bd->dev); + return devdata->intensity; +} + +static int mxcbl_check_fb(struct backlight_device *bd, struct fb_info *info) +{ + if (strcmp(info->fix.id, "DISP0 BG") == 0) { + return 1; + } + return 0; +} + +static struct backlight_ops mxcbl_ops = { + .get_brightness = mxcbl_get_intensity, + .update_status = mxcbl_send_intensity, + .check_fb = mxcbl_check_fb, +}; + +static int __init mxcbl_probe(struct platform_device *pdev) +{ + struct backlight_device *bd; + struct mxcbl_dev_data *devdata; + struct backlight_properties props; + int ret = 0; + + devdata = kzalloc(sizeof(struct mxcbl_dev_data), GFP_KERNEL); + if (!devdata) + return -ENOMEM; + + devdata->clk = clk_get(NULL, "lcdc_clk"); + + memset(&props, 0, sizeof(struct backlight_properties)); + props.max_brightness = MXC_MAX_INTENSITY; + + bd = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, devdata, + &mxcbl_ops, &props); + if (IS_ERR(bd)) { + ret = PTR_ERR(bd); + goto err0; + } + platform_set_drvdata(pdev, bd); + + bd->props.brightness = MXC_DEFAULT_INTENSITY; + bd->props.power = FB_BLANK_UNBLANK; + bd->props.fb_blank = FB_BLANK_UNBLANK; + mx2fb_set_brightness(MXC_DEFAULT_INTENSITY); + + printk("MXC Backlight Device %s Initialized.\n", dev_name(&pdev->dev)); + return 0; + err0: + kfree(devdata); + return ret; +} + +static int mxcbl_remove(struct platform_device *pdev) +{ + struct backlight_device *bd = platform_get_drvdata(pdev); + + bd->props.brightness = MXC_INTENSITY_OFF; + backlight_update_status(bd); + + backlight_device_unregister(bd); + + return 0; +} + +static struct platform_driver mxcbl_driver = { + .probe = mxcbl_probe, + .remove = mxcbl_remove, + .driver = { + .name = "mxc_lcdc_bl", + }, +}; + +static int __init mxcbl_init(void) +{ + return platform_driver_register(&mxcbl_driver); +} + +static void __exit mxcbl_exit(void) +{ + platform_driver_unregister(&mxcbl_driver); +} + +module_init(mxcbl_init); +module_exit(mxcbl_exit); + +MODULE_DESCRIPTION("Freescale MXC/i.MX LCDC PWM Backlight Driver"); +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/mxc_mc13892_bl.c b/drivers/video/backlight/mxc_mc13892_bl.c new file mode 100644 index 000000000000..752cae445c5a --- /dev/null +++ b/drivers/video/backlight/mxc_mc13892_bl.c @@ -0,0 +1,180 @@ +/* + * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/fb.h> +#include <linux/backlight.h> + +#include <linux/pmic_light.h> +#include <linux/pmic_external.h> + +/* +#define MXC_MAX_INTENSITY 255 +#define MXC_DEFAULT_INTENSITY 127 +*/ +/* workaround for atlas hot issue */ +#define MXC_MAX_INTENSITY 128 +#define MXC_DEFAULT_INTENSITY 64 + +#define MXC_INTENSITY_OFF 0 + +struct mxcbl_dev_data { + int intensity; + int suspend; +}; + +static int mxcbl_set_intensity(struct backlight_device *bd) +{ + int brightness = bd->props.brightness; + struct mxcbl_dev_data *devdata = dev_get_drvdata(&bd->dev); + + if (bd->props.power != FB_BLANK_UNBLANK) + brightness = 0; + if (bd->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + if (devdata->suspend) + brightness = 0; + + brightness = brightness / 4; + mc13892_bklit_set_dutycycle(LIT_MAIN, brightness); + devdata->intensity = brightness; + + return 0; +} + +static int mxcbl_get_intensity(struct backlight_device *bd) +{ + struct mxcbl_dev_data *devdata = dev_get_drvdata(&bd->dev); + return devdata->intensity; +} + +static int mxcbl_check_fb(struct backlight_device *bldev, struct fb_info *info) +{ + char *id = info->fix.id; + + if (!strcmp(id, "DISP3 BG")) + return 1; + else + return 0; +} + +static struct backlight_ops bl_ops; + +static int __init mxcbl_probe(struct platform_device *pdev) +{ + int ret = 0; + struct backlight_device *bd; + struct mxcbl_dev_data *devdata; + struct backlight_properties props; + pmic_version_t pmic_version; + + pr_debug("mc13892 backlight start probe\n"); + + devdata = kzalloc(sizeof(struct mxcbl_dev_data), GFP_KERNEL); + if (!devdata) + return -ENOMEM; + + bl_ops.check_fb = mxcbl_check_fb; + bl_ops.get_brightness = mxcbl_get_intensity; + bl_ops.update_status = mxcbl_set_intensity; + memset(&props, 0, sizeof(struct backlight_properties)); + props.max_brightness = MXC_MAX_INTENSITY; + bd = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, devdata, + &bl_ops, &props); + if (IS_ERR(bd)) { + ret = PTR_ERR(bd); + goto err0; + } + + platform_set_drvdata(pdev, bd); + + /* according to LCD spec, current should be 18mA */ + /* workaround for MC13892 TO1.1 crash issue, set current 6mA */ + pmic_version = pmic_get_version(); + if (pmic_version.revision < 20) + mc13892_bklit_set_current(LIT_MAIN, LIT_CURR_6); + else + mc13892_bklit_set_current(LIT_MAIN, LIT_CURR_18); + bd->props.brightness = MXC_DEFAULT_INTENSITY; + bd->props.power = FB_BLANK_UNBLANK; + bd->props.fb_blank = FB_BLANK_UNBLANK; + backlight_update_status(bd); + pr_debug("mc13892 backlight probed successfully\n"); + return 0; + + err0: + kfree(devdata); + return ret; +} + +static int mxcbl_remove(struct platform_device *pdev) +{ + struct backlight_device *bd = platform_get_drvdata(pdev); + struct mxcbl_dev_data *devdata = dev_get_drvdata(&bd->dev); + + kfree(devdata); + backlight_device_unregister(bd); + return 0; +} + +static int mxcbl_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct backlight_device *bd = platform_get_drvdata(pdev); + struct mxcbl_dev_data *devdata = dev_get_drvdata(&bd->dev); + + devdata->suspend = 1; + backlight_update_status(bd); + return 0; +} + +static int mxcbl_resume(struct platform_device *pdev) +{ + struct backlight_device *bd = platform_get_drvdata(pdev); + struct mxcbl_dev_data *devdata = dev_get_drvdata(&bd->dev); + + devdata->suspend = 0; + backlight_update_status(bd); + return 0; +} + +static struct platform_driver mxcbl_driver = { + .probe = mxcbl_probe, + .remove = mxcbl_remove, + .suspend = mxcbl_suspend, + .resume = mxcbl_resume, + .driver = { + .name = "mxc_mc13892_bl", + }, +}; + +static int __init mxcbl_init(void) +{ + return platform_driver_register(&mxcbl_driver); +} + +static void __exit mxcbl_exit(void) +{ + platform_driver_unregister(&mxcbl_driver); +} + +module_init(mxcbl_init); +module_exit(mxcbl_exit); + +MODULE_DESCRIPTION("Freescale MXC/i.MX PMIC Backlight Driver"); +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/mxc_pmic_bl.c b/drivers/video/backlight/mxc_pmic_bl.c new file mode 100644 index 000000000000..b8ac44132bfa --- /dev/null +++ b/drivers/video/backlight/mxc_pmic_bl.c @@ -0,0 +1,200 @@ +/* + * Copyright 2007-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ +/*! + * @defgroup PMIC_BL MXC PMIC Backlight Driver + */ +/*! + * @file mxc_pmic_bl.c + * + * @brief PMIC Backlight Driver for Freescale MXC/i.MX platforms. + * + * This file contains API defined in include/linux/clk.h for setting up and + * retrieving clocks. + * + * Based on Sharp's Corgi Backlight Driver + * + * @ingroup PMIC_BL + */ + +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/pmic_light.h> + +#include <mach/pmic_power.h> + +#define MXC_MAX_INTENSITY 255 +#define MXC_DEFAULT_INTENSITY 127 +#define MXC_INTENSITY_OFF 0 + +struct mxcbl_dev_data { + int bl_id; + int intensity; + struct backlight_ops bl_ops; +}; + +static int pmic_bl_use_count; +static int main_fb_id; +static int sec_fb_id; + +static int mxcbl_send_intensity(struct backlight_device *bd) +{ + int intensity = bd->props.brightness; + struct mxcbl_dev_data *devdata = dev_get_drvdata(&bd->dev); + + if (bd->props.power != FB_BLANK_UNBLANK) + intensity = 0; + if (bd->props.fb_blank != FB_BLANK_UNBLANK) + intensity = 0; + + intensity = intensity / 16; + pmic_bklit_set_dutycycle(devdata->bl_id, intensity); + + devdata->intensity = intensity; + return 0; +} + +static int mxcbl_get_intensity(struct backlight_device *bd) +{ + struct mxcbl_dev_data *devdata = dev_get_drvdata(&bd->dev); + return devdata->intensity; +} + +static int mxcbl_check_main_fb(struct fb_info *info) +{ + int id = info->fix.id[4] - '0'; + + if (id == main_fb_id) { + return 1; + } else { + return 0; + } +} + +static int mxcbl_check_sec_fb(struct backlight_device *bldev, struct fb_info *info) +{ + int id = info->fix.id[4] - '0'; + + if (id == sec_fb_id) { + return 1; + } else { + return 0; + } +} + +static int __init mxcbl_probe(struct platform_device *pdev) +{ + int ret = 0; + struct backlight_device *bd; + struct mxcbl_dev_data *devdata; + struct backlight_properties props; + + devdata = kzalloc(sizeof(struct mxcbl_dev_data), GFP_KERNEL); + if (!devdata) + return -ENOMEM; + devdata->bl_id = pdev->id; + + if (pdev->id == 0) { + devdata->bl_ops.check_fb = mxcbl_check_main_fb; + main_fb_id = (int)pdev->dev.platform_data; + } else { + devdata->bl_ops.check_fb = mxcbl_check_sec_fb; + sec_fb_id = (int)pdev->dev.platform_data; + } + + devdata->bl_ops.get_brightness = mxcbl_get_intensity; + devdata->bl_ops.update_status = mxcbl_send_intensity, + memset(&props, 0, sizeof(struct backlight_properties)); + props.max_brightness = MXC_MAX_INTENSITY; + bd = + backlight_device_register(dev_name(&pdev->dev), &pdev->dev, devdata, + &devdata->bl_ops, &props); + if (IS_ERR(bd)) { + ret = PTR_ERR(bd); + goto err0; + } + + platform_set_drvdata(pdev, bd); + + if (pmic_bl_use_count++ == 0) { + pmic_power_regulator_on(SW_SW3); + pmic_power_regulator_set_lp_mode(SW_SW3, LOW_POWER_CTRL_BY_PIN); + + pmic_bklit_tcled_master_enable(); + pmic_bklit_enable_edge_slow(); + pmic_bklit_set_cycle_time(0); + } + + pmic_bklit_set_current(devdata->bl_id, 7); + bd->props.brightness = MXC_DEFAULT_INTENSITY; + bd->props.power = FB_BLANK_UNBLANK; + bd->props.fb_blank = FB_BLANK_UNBLANK; + backlight_update_status(bd); + + printk("MXC Backlight Device %s Initialized.\n", dev_name(&pdev->dev)); + return 0; + err0: + kfree(devdata); + return ret; +} + +static int mxcbl_remove(struct platform_device *pdev) +{ + struct backlight_device *bd = platform_get_drvdata(pdev); + + bd->props.brightness = MXC_INTENSITY_OFF; + backlight_update_status(bd); + + if (--pmic_bl_use_count == 0) { + pmic_bklit_tcled_master_disable(); + + pmic_power_regulator_off(SW_SW3); + pmic_power_regulator_set_lp_mode(SW_SW3, LOW_POWER_CTRL_BY_PIN); + } + + backlight_device_unregister(bd); + + printk("MXC Backlight Driver Unloaded\n"); + + return 0; +} + +static struct platform_driver mxcbl_driver = { + .probe = mxcbl_probe, + .remove = mxcbl_remove, + .driver = { + .name = "mxc_pmic_bl", + }, +}; + +static int __init mxcbl_init(void) +{ + return platform_driver_register(&mxcbl_driver); +} + +static void __exit mxcbl_exit(void) +{ + platform_driver_unregister(&mxcbl_driver); +} + +module_init(mxcbl_init); +module_exit(mxcbl_exit); + +MODULE_DESCRIPTION("Freescale MXC/i.MX PMIC Backlight Driver"); +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/mxs_bl.c b/drivers/video/backlight/mxs_bl.c new file mode 100644 index 000000000000..271fd2907f59 --- /dev/null +++ b/drivers/video/backlight/mxs_bl.c @@ -0,0 +1,387 @@ +/* + * Backlight Driver for Freescale MXS + * + * Embedded Alley Solutions, Inc <source@embeddedalley.com> + * + * Copyright 2008-2010 Freescale Semiconductor, Inc. + * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/spinlock.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/regulator/consumer.h> + +#include <mach/lcdif.h> +#include <mach/regulator.h> + +struct mxs_bl_data { + struct notifier_block nb; + struct notifier_block reg_nb; + struct notifier_block reg_init_nb; + struct backlight_device *bd; + struct mxs_platform_bl_data *pdata; + int current_intensity; + int saved_intensity; + int mxsbl_suspended; + int mxsbl_constrained; +}; + +static int mxsbl_do_probe(struct mxs_bl_data *data, + struct mxs_platform_bl_data *pdata); +static int mxsbl_set_intensity(struct backlight_device *bd); +static inline void bl_register_reg(struct mxs_platform_bl_data *pdata, + struct mxs_bl_data *data); + + +/* + * If we got here init is done + */ +static int bl_init_reg_callback(struct notifier_block *self, + unsigned long event, void *data) +{ + struct mxs_bl_data *bdata; + struct mxs_platform_bl_data *pdata; + struct regulator *r = regulator_get(NULL, "mxs-bl-1"); + + bdata = container_of(self, struct mxs_bl_data, reg_init_nb); + pdata = bdata->pdata; + + if (r && !IS_ERR(r)) + regulator_put(r); + else + goto out; + + bl_register_reg(pdata, bdata); + + if (pdata->regulator) { + + printk(KERN_NOTICE"%s: setting intensity\n", __func__); + + bus_unregister_notifier(&platform_bus_type, + &bdata->reg_init_nb); + mutex_lock(&bdata->bd->ops_lock); + mxsbl_set_intensity(bdata->bd); + mutex_unlock(&bdata->bd->ops_lock); + } + +out: + return 0; +} + +static int bl_reg_callback(struct notifier_block *self, + unsigned long event, void *data) +{ + struct mxs_bl_data *bdata; + struct mxs_platform_bl_data *pdata; + bdata = container_of(self, struct mxs_bl_data, reg_nb); + pdata = bdata->pdata; + + mutex_lock(&bdata->bd->ops_lock); + + switch (event) { + case MXS_REG5V_IS_USB: + bdata->bd->props.max_brightness = pdata->bl_cons_intensity; + bdata->bd->props.brightness = pdata->bl_cons_intensity; + bdata->saved_intensity = bdata->current_intensity; + bdata->mxsbl_constrained = 1; + break; + case MXS_REG5V_NOT_USB: + bdata->bd->props.max_brightness = pdata->bl_max_intensity; + bdata->bd->props.brightness = bdata->saved_intensity; + bdata->mxsbl_constrained = 0; + break; + } + + mxsbl_set_intensity(bdata->bd); + mutex_unlock(&bdata->bd->ops_lock); + return 0; +} + +static inline void bl_unregister_reg(struct mxs_platform_bl_data *pdata, + struct mxs_bl_data *data) +{ + if (!pdata) + return; + if (pdata->regulator) + regulator_unregister_notifier(pdata->regulator, + &data->reg_nb); + if (pdata->regulator) + regulator_put(pdata->regulator); + pdata->regulator = NULL; +} + +static inline void bl_register_reg(struct mxs_platform_bl_data *pdata, + struct mxs_bl_data *data) +{ + pdata->regulator = regulator_get(NULL, "mxs-bl-1"); + if (pdata->regulator && !IS_ERR(pdata->regulator)) { + regulator_set_mode(pdata->regulator, REGULATOR_MODE_FAST); + if (pdata->regulator) { + data->reg_nb.notifier_call = bl_reg_callback; + regulator_register_notifier(pdata->regulator, + &data->reg_nb); + } + } else{ + printk(KERN_ERR "%s: failed to get regulator\n", __func__); + pdata->regulator = NULL; + } + +} + +static int bl_callback(struct notifier_block *self, + unsigned long event, void *data) +{ + struct mxs_platform_fb_entry *pentry = data; + struct mxs_bl_data *bdata; + struct mxs_platform_bl_data *pdata; + + switch (event) { + case MXS_LCDIF_PANEL_INIT: + bdata = container_of(self, struct mxs_bl_data, nb); + pdata = pentry->bl_data; + bdata->pdata = pdata; + if (pdata) { + bl_register_reg(pdata, bdata); + if (!pdata->regulator) { + /* wait for regulator to appear */ + bdata->reg_init_nb.notifier_call = + bl_init_reg_callback; + bus_register_notifier(&platform_bus_type, + &bdata->reg_init_nb); + } + return mxsbl_do_probe(bdata, pdata); + } + break; + + case MXS_LCDIF_PANEL_RELEASE: + bdata = container_of(self, struct mxs_bl_data, nb); + pdata = pentry->bl_data; + if (pdata) { + bus_unregister_notifier(&platform_bus_type, + &bdata->reg_init_nb); + bl_unregister_reg(pdata, bdata); + pdata->free_bl(pdata); + } + bdata->pdata = NULL; + break; + } + return 0; +} + +#ifdef CONFIG_PM +static int mxsbl_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct mxs_bl_data *data = platform_get_drvdata(pdev); + struct mxs_platform_bl_data *pdata = data->pdata; + + data->mxsbl_suspended = 1; + if (pdata) { + dev_dbg(&pdev->dev, "real suspend\n"); + mxsbl_set_intensity(data->bd); + } + return 0; +} + +static int mxsbl_resume(struct platform_device *pdev) +{ + struct mxs_bl_data *data = platform_get_drvdata(pdev); + struct mxs_platform_bl_data *pdata = data->pdata; + int ret = 0; + + data->mxsbl_suspended = 0; + if (pdata) { + dev_dbg(&pdev->dev, "real resume\n"); + pdata->free_bl(pdata); + ret = pdata->init_bl(pdata); + if (ret) + goto out; + mxsbl_set_intensity(data->bd); + } +out: + return ret; +} +#else +#define mxsbl_suspend NULL +#define mxsbl_resume NULL +#endif +/* + * This function should be called with bd->ops_lock held + * Suspend/resume ? + */ +static int mxsbl_set_intensity(struct backlight_device *bd) +{ + struct platform_device *pdev = dev_get_drvdata(&bd->dev); + struct mxs_bl_data *data = platform_get_drvdata(pdev); + struct mxs_platform_bl_data *pdata = data->pdata; + + if (pdata) { + int ret; + + ret = pdata->set_bl_intensity(pdata, bd, + data->mxsbl_suspended); + if (ret) + bd->props.brightness = data->current_intensity; + else + data->current_intensity = bd->props.brightness; + return ret; + } else + return -ENODEV; +} + +static int mxsbl_get_intensity(struct backlight_device *bd) +{ + struct platform_device *pdev = dev_get_drvdata(&bd->dev); + struct mxs_bl_data *data = platform_get_drvdata(pdev); + + return data->current_intensity; +} + +static struct backlight_ops mxsbl_ops = { + .get_brightness = mxsbl_get_intensity, + .update_status = mxsbl_set_intensity, +}; + +static int mxsbl_do_probe(struct mxs_bl_data *data, + struct mxs_platform_bl_data *pdata) +{ + int ret = pdata->init_bl(pdata); + + if (ret) + goto out; + + data->bd->props.power = FB_BLANK_UNBLANK; + data->bd->props.fb_blank = FB_BLANK_UNBLANK; + + if (!data->mxsbl_suspended) + if (data->mxsbl_constrained) { + data->bd->props.max_brightness = pdata->bl_cons_intensity; + data->bd->props.brightness = pdata->bl_cons_intensity; + } else { + data->bd->props.max_brightness = pdata->bl_max_intensity; + data->bd->props.brightness = pdata->bl_default_intensity; + } + + data->pdata = pdata; + mxsbl_set_intensity(data->bd); + +out: + return ret; +} + +static int __init mxsbl_probe(struct platform_device *pdev) +{ + struct mxs_bl_data *data; + struct mxs_platform_bl_data *pdata = pdev->dev.platform_data; + int ret = 0; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) { + ret = -ENOMEM; + goto out; + } + data->bd = backlight_device_register(pdev->name, &pdev->dev, pdev, + &mxsbl_ops, NULL); + if (IS_ERR(data->bd)) { + ret = PTR_ERR(data->bd); + goto out_1; + } + + get_device(&pdev->dev); + + data->nb.notifier_call = bl_callback; + mxs_lcdif_register_client(&data->nb); + platform_set_drvdata(pdev, data); + + if (pdata) { + ret = mxsbl_do_probe(data, pdata); + if (ret) + goto out_2; + } + + goto out; + +out_2: + put_device(&pdev->dev); +out_1: + kfree(data); +out: + return ret; +} + +static int mxsbl_remove(struct platform_device *pdev) +{ + struct mxs_platform_bl_data *pdata = pdev->dev.platform_data; + struct mxs_bl_data *data = platform_get_drvdata(pdev); + struct backlight_device *bd = data->bd; + + bd->props.power = FB_BLANK_POWERDOWN; + bd->props.fb_blank = FB_BLANK_POWERDOWN; + bd->props.brightness = 0; + data->current_intensity = bd->props.brightness; + + if (pdata) { + pdata->set_bl_intensity(pdata, bd, data->mxsbl_suspended); + if (pdata->free_bl) + pdata->free_bl(pdata); + } + backlight_device_unregister(bd); + if (pdata->regulator) + regulator_put(pdata->regulator); + put_device(&pdev->dev); + platform_set_drvdata(pdev, NULL); + mxs_lcdif_unregister_client(&data->nb); + kfree(data); + + return 0; +} + +static struct platform_driver mxsbl_driver = { + .probe = mxsbl_probe, + .remove = __devexit_p(mxsbl_remove), + .suspend = mxsbl_suspend, + .resume = mxsbl_resume, + .driver = { + .name = "mxs-bl", + .owner = THIS_MODULE, + }, +}; + +static int __init mxs_init(void) +{ + return platform_driver_register(&mxsbl_driver); +} + +static void __exit mxs_exit(void) +{ + platform_driver_unregister(&mxsbl_driver); +} + +module_init(mxs_init); +module_exit(mxs_exit); + +MODULE_AUTHOR("Embedded Alley Solutions, Inc <sources@embeddedalley.com>"); +MODULE_DESCRIPTION("MXS Backlight Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 550443518891..3c14c923a3c7 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -59,9 +59,19 @@ static int pwm_backlight_get_brightness(struct backlight_device *bl) return bl->props.brightness; } +static int pwm_backlight_check_fb(struct fb_info *info) +{ + char *id = info->fix.id; + if (!strcmp(id, "DISP3 BG")) + return 1; + else + return 0; +} + static const struct backlight_ops pwm_backlight_ops = { .update_status = pwm_backlight_update_status, .get_brightness = pwm_backlight_get_brightness, + .check_fb = pwm_backlight_check_fb, }; static int pwm_backlight_probe(struct platform_device *pdev) diff --git a/drivers/video/backlight/wm8350_bl.c b/drivers/video/backlight/wm8350_bl.c new file mode 100644 index 000000000000..6865b753d8ce --- /dev/null +++ b/drivers/video/backlight/wm8350_bl.c @@ -0,0 +1,299 @@ +/* + * Backlight driver for DCDC2 on i.MX32ADS board + * + * Copyright(C) 2007 Wolfson Microelectronics PLC. + * Copyright (C) 2010 Freescale Semiconductor, Inc. + * + * 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/kernel.h> +#include <linux/init.h> +#include <linux/mutex.h> +#include <linux/fb.h> +#include <linux/platform_device.h> +#include <linux/backlight.h> +#include <linux/regulator/consumer.h> +#include <linux/mfd/wm8350/pmic.h> +#include <linux/mfd/wm8350/bl.h> + +struct wm8350_backlight { + struct backlight_properties props; + struct backlight_device *device; + struct regulator *dcdc; + struct regulator *isink; + struct notifier_block notifier; + struct work_struct work; + struct mutex mutex; + int intensity; + int suspend; + int retries; +}; + +/* hundredths of uA, 405 = 4.05 uA */ +static const int intensity_huA[] = { + 405, 482, 573, 681, 810, 963, 1146, 1362, 1620, 1927, 2291, 2725, + 3240, 3853, 4582, 5449, 6480, 7706, 9164, 10898, 12960, 15412, 18328, + 21796, 25920, 30824, 36656, 43592, 51840, 61648, 73313, 87184, + 103680, 123297, 146626, 174368, 207360, 246594, 293251, 348737, + 414720, 493188, 586503, 697473, 829440, 986376, 1173005, 1394946, + 1658880, 1972752, 2346011, 2789892, 3317760, 3945504, 4692021, + 5579785, 6635520, 7891008, 9384042, 11159570, 13271040, 15782015, + 18768085, 22319140, +}; + +static void bl_work(struct work_struct *work) +{ + struct wm8350_backlight *bl = + container_of(work, struct wm8350_backlight, work); + struct regulator *isink = bl->isink; + + mutex_lock(&bl->mutex); + if (bl->intensity >= 0 && + bl->intensity < ARRAY_SIZE(intensity_huA)) { + bl->retries = 0; + regulator_set_current_limit(isink, + 0, intensity_huA[bl->intensity] / 100); + } else + printk(KERN_ERR "wm8350: Backlight intensity error\n"); + mutex_unlock(&bl->mutex); +} + +static int wm8350_bl_notifier(struct notifier_block *self, + unsigned long event, void *data) +{ + struct wm8350_backlight *bl = + container_of(self, struct wm8350_backlight, notifier); + struct regulator *isink = bl->isink; + + if (event & REGULATOR_EVENT_UNDER_VOLTAGE) + printk(KERN_ERR "wm8350: BL DCDC undervoltage\n"); + if (event & REGULATOR_EVENT_REGULATION_OUT) + printk(KERN_ERR "wm8350: BL ISINK out of regulation\n"); + + mutex_lock(&bl->mutex); + if (bl->retries) { + bl->retries--; + regulator_disable(isink); + regulator_set_current_limit(isink, 0, bl->intensity); + regulator_enable(isink); + } else { + printk(KERN_ERR + "wm8350: BL regulation retry failure - disable\n"); + bl->intensity = 0; + regulator_disable(isink); + } + mutex_unlock(&bl->mutex); + return 0; +} + +static int wm8350_bl_send_intensity(struct backlight_device *bd) +{ + struct wm8350_backlight *bl = + (struct wm8350_backlight *)dev_get_drvdata(&bd->dev); + int intensity = bd->props.brightness; + + if (bd->props.power != FB_BLANK_UNBLANK) + intensity = 0; + if (bd->props.fb_blank != FB_BLANK_UNBLANK) + intensity = 0; + if (bl->suspend) + intensity = 0; + + mutex_lock(&bl->mutex); + bl->intensity = intensity; + mutex_unlock(&bl->mutex); + schedule_work(&bl->work); + + return 0; +} + +#ifdef CONFIG_PM +static int wm8350_bl_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct wm8350_backlight *bl = + (struct wm8350_backlight *)platform_get_drvdata(pdev); + + bl->suspend = 1; + backlight_update_status(bl->device); + return 0; +} + +static int wm8350_bl_resume(struct platform_device *pdev) +{ + struct wm8350_backlight *bl = + (struct wm8350_backlight *)platform_get_drvdata(pdev); + + bl->suspend = 0; + backlight_update_status(bl->device); + return 0; +} +#else +#define wm8350_bl_suspend NULL +#define wm8350_bl_resume NULL +#endif + +static int wm8350_bl_get_intensity(struct backlight_device *bd) +{ + struct wm8350_backlight *bl = + (struct wm8350_backlight *)dev_get_drvdata(&bd->dev); + return bl->intensity; +} + +static struct backlight_ops wm8350_bl_ops = { + .get_brightness = wm8350_bl_get_intensity, + .update_status = wm8350_bl_send_intensity, +}; + +static int wm8350_bl_probe(struct platform_device *pdev) +{ + struct regulator *isink, *dcdc; + struct wm8350_backlight *bl; + struct wm8350_bl_platform_data *pdata = pdev->dev.platform_data; + struct wm8350 *pmic; + int ret; + + if (pdata == NULL) { + printk(KERN_ERR "%s: no platform data\n", __func__); + return -ENODEV; + } + + if (pdata->isink != WM8350_ISINK_A && pdata->isink != WM8350_ISINK_B) { + printk(KERN_ERR "%s: invalid ISINK\n", __func__); + return -EINVAL; + } + if (pdata->dcdc != WM8350_DCDC_2 && pdata->dcdc != WM8350_DCDC_5) { + printk(KERN_ERR "%s: invalid DCDC\n", __func__); + return -EINVAL; + } + + printk(KERN_INFO "wm8350: backlight using %s and %s\n", + pdata->isink == WM8350_ISINK_A ? "ISINKA" : "ISINKB", + pdata->dcdc == WM8350_DCDC_2 ? "DCDC2" : "DCDC5"); + + isink = regulator_get(&pdev->dev, + pdata->isink == WM8350_ISINK_A ? "ISINKA" : "ISINKB"); + if (IS_ERR(isink) || isink == NULL) { + printk(KERN_ERR "%s: cant get ISINK\n", __func__); + return PTR_ERR(isink); + } + + dcdc = regulator_get(&pdev->dev, + pdata->dcdc == WM8350_DCDC_2 ? "DCDC2" : "DCDC5"); + if (IS_ERR(dcdc) || dcdc == NULL) { + printk(KERN_ERR "%s: cant get DCDC\n", __func__); + regulator_put(isink); + return PTR_ERR(dcdc); + } + + bl = kzalloc(sizeof(*bl), GFP_KERNEL); + if (bl == NULL) { + regulator_put(isink); + regulator_put(dcdc); + return -ENOMEM; + } + + mutex_init(&bl->mutex); + INIT_WORK(&bl->work, bl_work); + bl->props.max_brightness = pdata->max_brightness; + bl->props.power = pdata->power; + bl->props.brightness = pdata->brightness; + bl->retries = pdata->retries; + bl->dcdc = dcdc; + bl->isink = isink; + platform_set_drvdata(pdev, bl); + pmic = regulator_get_drvdata(bl->isink); + + wm8350_bl_ops.check_fb = pdata->check_fb; + + bl->device = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, + bl, &wm8350_bl_ops); + if (IS_ERR(bl->device)) { + ret = PTR_ERR(bl->device); + regulator_put(dcdc); + regulator_put(isink); + kfree(bl); + return ret; + } + + bl->notifier.notifier_call = wm8350_bl_notifier; + regulator_register_notifier(dcdc, &bl->notifier); + regulator_register_notifier(isink, &bl->notifier); + bl->device->props = bl->props; + + regulator_set_current_limit(isink, 0, 20000); + + wm8350_isink_set_flash(pmic, pdata->isink, + WM8350_ISINK_FLASH_DISABLE, + WM8350_ISINK_FLASH_TRIG_BIT, + WM8350_ISINK_FLASH_DUR_32MS, + WM8350_ISINK_FLASH_ON_1_00S, + WM8350_ISINK_FLASH_OFF_1_00S, + WM8350_ISINK_FLASH_MODE_EN); + + wm8350_dcdc25_set_mode(pmic, pdata->dcdc, + WM8350_ISINK_MODE_BOOST, WM8350_ISINK_ILIM_NORMAL, + pdata->voltage_ramp, pdata->isink == WM8350_ISINK_A ? + WM8350_DC5_FBSRC_ISINKA : WM8350_DC5_FBSRC_ISINKB); + + wm8350_dcdc_set_slot(pmic, pdata->dcdc, 15, 0, + pdata->dcdc == WM8350_DCDC_2 ? + WM8350_DC2_ERRACT_SHUTDOWN_CONV : WM8350_DC5_ERRACT_NONE); + + regulator_enable(isink); + backlight_update_status(bl->device); + return 0; +} + +static int wm8350_bl_remove(struct platform_device *pdev) +{ + struct wm8350_backlight *bl = + (struct wm8350_backlight *)platform_get_drvdata(pdev); + struct regulator *isink = bl->isink, *dcdc = bl->dcdc; + + bl->intensity = 0; + backlight_update_status(bl->device); + schedule_work(&bl->work); + flush_scheduled_work(); + backlight_device_unregister(bl->device); + + regulator_set_current_limit(isink, 0, 0); + regulator_disable(isink); + regulator_unregister_notifier(isink, &bl->notifier); + regulator_unregister_notifier(dcdc, &bl->notifier); + regulator_put(isink); + regulator_put(dcdc); + return 0; +} + +struct platform_driver imx32ads_backlight_driver = { + .driver = { + .name = "wm8350-bl", + .owner = THIS_MODULE, + }, + .probe = wm8350_bl_probe, + .remove = wm8350_bl_remove, + .suspend = wm8350_bl_suspend, + .resume = wm8350_bl_resume, +}; + +static int __devinit imx32ads_backlight_init(void) +{ + return platform_driver_register(&imx32ads_backlight_driver); +} + +static void imx32ads_backlight_exit(void) +{ + platform_driver_unregister(&imx32ads_backlight_driver); +} + +device_initcall_sync(imx32ads_backlight_init); +module_exit(imx32ads_backlight_exit); + +MODULE_AUTHOR("Liam Girdwood <lg@opensource.wolfsonmicro.com>"); +MODULE_DESCRIPTION("WM8350 Backlight driver"); +MODULE_LICENSE("GPL"); |