diff options
Diffstat (limited to 'arch/arm/plat-samsung/dev-backlight.c')
| -rw-r--r-- | arch/arm/plat-samsung/dev-backlight.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/arch/arm/plat-samsung/dev-backlight.c b/arch/arm/plat-samsung/dev-backlight.c deleted file mode 100644 index 2157c5b53..000000000 --- a/arch/arm/plat-samsung/dev-backlight.c +++ /dev/null @@ -1,152 +0,0 @@ -/* linux/arch/arm/plat-samsung/dev-backlight.c - * - * Copyright (c) 2011 Samsung Electronics Co., Ltd. - * http://www.samsung.com - * - * Common infrastructure for PWM Backlight for Samsung boards - * - * 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/gpio.h> -#include <linux/platform_device.h> -#include <linux/slab.h> -#include <linux/io.h> -#include <linux/pwm_backlight.h> - -#include <plat/devs.h> -#include <plat/gpio-cfg.h> -#include <plat/backlight.h> - -struct samsung_bl_drvdata { - struct platform_pwm_backlight_data plat_data; - struct samsung_bl_gpio_info *gpio_info; -}; - -static int samsung_bl_init(struct device *dev) -{ - int ret = 0; - struct platform_pwm_backlight_data *pdata = dev->platform_data; - struct samsung_bl_drvdata *drvdata = container_of(pdata, - struct samsung_bl_drvdata, plat_data); - struct samsung_bl_gpio_info *bl_gpio_info = drvdata->gpio_info; - - ret = gpio_request(bl_gpio_info->no, "Backlight"); - if (ret) { - printk(KERN_ERR "failed to request GPIO for LCD Backlight\n"); - return ret; - } - - /* Configure GPIO pin with specific GPIO function for PWM timer */ - s3c_gpio_cfgpin(bl_gpio_info->no, bl_gpio_info->func); - - return 0; -} - -static void samsung_bl_exit(struct device *dev) -{ - struct platform_pwm_backlight_data *pdata = dev->platform_data; - struct samsung_bl_drvdata *drvdata = container_of(pdata, - struct samsung_bl_drvdata, plat_data); - struct samsung_bl_gpio_info *bl_gpio_info = drvdata->gpio_info; - - s3c_gpio_cfgpin(bl_gpio_info->no, S3C_GPIO_OUTPUT); - gpio_free(bl_gpio_info->no); -} - -/* Initialize few important fields of platform_pwm_backlight_data - * structure with default values. These fields can be overridden by - * board-specific values sent from machine file. - * For ease of operation, these fields are initialized with values - * used by most samsung boards. - * Users has the option of sending info about other parameters - * for their specific boards - */ - -static struct samsung_bl_drvdata samsung_dfl_bl_data __initdata = { - .plat_data = { - .max_brightness = 255, - .dft_brightness = 255, - .pwm_period_ns = 78770, - .enable_gpio = -1, - .init = samsung_bl_init, - .exit = samsung_bl_exit, - }, -}; - -static struct platform_device samsung_dfl_bl_device __initdata = { - .name = "pwm-backlight", -}; - -/* samsung_bl_set - Set board specific data (if any) provided by user for - * PWM Backlight control and register specific PWM and backlight device. - * @gpio_info: structure containing GPIO info for PWM timer - * @bl_data: structure containing Backlight control data - */ -void __init samsung_bl_set(struct samsung_bl_gpio_info *gpio_info, - struct platform_pwm_backlight_data *bl_data) -{ - int ret = 0; - struct platform_device *samsung_bl_device; - struct samsung_bl_drvdata *samsung_bl_drvdata; - struct platform_pwm_backlight_data *samsung_bl_data; - - samsung_bl_device = kmemdup(&samsung_dfl_bl_device, - sizeof(struct platform_device), GFP_KERNEL); - if (!samsung_bl_device) { - printk(KERN_ERR "%s: no memory for platform dev\n", __func__); - return; - } - - samsung_bl_drvdata = kmemdup(&samsung_dfl_bl_data, - sizeof(samsung_dfl_bl_data), GFP_KERNEL); - if (!samsung_bl_drvdata) { - printk(KERN_ERR "%s: no memory for platform dev\n", __func__); - goto err_data; - } - samsung_bl_device->dev.platform_data = &samsung_bl_drvdata->plat_data; - samsung_bl_drvdata->gpio_info = gpio_info; - samsung_bl_data = &samsung_bl_drvdata->plat_data; - - /* Copy board specific data provided by user */ - samsung_bl_data->pwm_id = bl_data->pwm_id; - samsung_bl_device->dev.parent = &samsung_device_pwm.dev; - - if (bl_data->max_brightness) - samsung_bl_data->max_brightness = bl_data->max_brightness; - if (bl_data->dft_brightness) - samsung_bl_data->dft_brightness = bl_data->dft_brightness; - if (bl_data->lth_brightness) - samsung_bl_data->lth_brightness = bl_data->lth_brightness; - if (bl_data->pwm_period_ns) - samsung_bl_data->pwm_period_ns = bl_data->pwm_period_ns; - if (bl_data->enable_gpio >= 0) - samsung_bl_data->enable_gpio = bl_data->enable_gpio; - if (bl_data->init) - samsung_bl_data->init = bl_data->init; - if (bl_data->notify) - samsung_bl_data->notify = bl_data->notify; - if (bl_data->notify_after) - samsung_bl_data->notify_after = bl_data->notify_after; - if (bl_data->exit) - samsung_bl_data->exit = bl_data->exit; - if (bl_data->check_fb) - samsung_bl_data->check_fb = bl_data->check_fb; - - /* Register the Backlight dev */ - ret = platform_device_register(samsung_bl_device); - if (ret) { - printk(KERN_ERR "failed to register backlight device: %d\n", ret); - goto err_plat_reg2; - } - - return; - -err_plat_reg2: - kfree(samsung_bl_data); -err_data: - kfree(samsung_bl_device); - return; -} |