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Release 4.11 arch/arm/mach-s3c64xx/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 "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; }

Contributors

PersonTokensPropCommitsCommitProp
Banajit Goswami7482.22%150.00%
Tomasz Figa1617.78%150.00%
Total90100.00%2100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Banajit Goswami4473.33%150.00%
Tomasz Figa1626.67%150.00%
Total60100.00%2100.00%

/* 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, .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_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->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; }

Contributors

PersonTokensPropCommitsCommitProp
Banajit Goswami24078.43%120.00%
Tomasz Figa3511.44%120.00%
Thierry Reding165.23%120.00%
Jingoo Han144.58%120.00%
Tushar Behera10.33%120.00%
Total306100.00%5100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Banajit Goswami42076.50%112.50%
Tomasz Figa8715.85%112.50%
Thierry Reding224.01%112.50%
Jingoo Han142.55%112.50%
Paul Gortmaker30.55%112.50%
Kukjin Kim20.36%225.00%
Tushar Behera10.18%112.50%
Total549100.00%8100.00%
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