1 // SPDX-License-Identifier: GPL-2.0
6 // Common infrastructure for PWM Backlight for Samsung boards
8 #include <linux/gpio.h>
15 #include <plat/gpio-cfg.h>
17 #include "backlight.h"
27 	struct platform_pwm_backlight_data *pdata = dev->platform_data;  in samsung_bl_init()
30 	struct samsung_bl_gpio_info *bl_gpio_info = drvdata->gpio_info;  in samsung_bl_init()
32 	ret = gpio_request(bl_gpio_info->no, "Backlight");  in samsung_bl_init()
34 		printk(KERN_ERR "failed to request GPIO for LCD Backlight\n");  in samsung_bl_init()
38 	/* Configure GPIO pin with specific GPIO function for PWM timer */  in samsung_bl_init()
39 	s3c_gpio_cfgpin(bl_gpio_info->no, bl_gpio_info->func);  in samsung_bl_init()
46 	struct platform_pwm_backlight_data *pdata = dev->platform_data;  in samsung_bl_exit()
49 	struct samsung_bl_gpio_info *bl_gpio_info = drvdata->gpio_info;  in samsung_bl_exit()
51 	s3c_gpio_cfgpin(bl_gpio_info->no, S3C_GPIO_OUTPUT);  in samsung_bl_exit()
52 	gpio_free(bl_gpio_info->no);  in samsung_bl_exit()
57  * board-specific values sent from machine file.
68 		.enable_gpio    = -1,
75 	.name		= "pwm-backlight",
78 /* samsung_bl_set - Set board specific data (if any) provided by user for
79  * PWM Backlight control and register specific PWM and backlight device.
80  * @gpio_info:	structure containing GPIO info for PWM timer
81  * @bl_data:	structure containing Backlight control data
101 	samsung_bl_device->dev.platform_data = &samsung_bl_drvdata->plat_data;  in samsung_bl_set()
102 	samsung_bl_drvdata->gpio_info = gpio_info;  in samsung_bl_set()
103 	samsung_bl_data = &samsung_bl_drvdata->plat_data;  in samsung_bl_set()
106 	samsung_bl_device->dev.parent = &samsung_device_pwm.dev;  in samsung_bl_set()
108 	if (bl_data->max_brightness)  in samsung_bl_set()
109 		samsung_bl_data->max_brightness = bl_data->max_brightness;  in samsung_bl_set()
110 	if (bl_data->dft_brightness)  in samsung_bl_set()
111 		samsung_bl_data->dft_brightness = bl_data->dft_brightness;  in samsung_bl_set()
112 	if (bl_data->lth_brightness)  in samsung_bl_set()
113 		samsung_bl_data->lth_brightness = bl_data->lth_brightness;  in samsung_bl_set()
114 	if (bl_data->enable_gpio >= 0)  in samsung_bl_set()
115 		samsung_bl_data->enable_gpio = bl_data->enable_gpio;  in samsung_bl_set()
116 	if (bl_data->init)  in samsung_bl_set()
117 		samsung_bl_data->init = bl_data->init;  in samsung_bl_set()
118 	if (bl_data->notify)  in samsung_bl_set()
119 		samsung_bl_data->notify = bl_data->notify;  in samsung_bl_set()
120 	if (bl_data->notify_after)  in samsung_bl_set()
121 		samsung_bl_data->notify_after = bl_data->notify_after;  in samsung_bl_set()
122 	if (bl_data->exit)  in samsung_bl_set()
123 		samsung_bl_data->exit = bl_data->exit;  in samsung_bl_set()
124 	if (bl_data->check_fb)  in samsung_bl_set()
125 		samsung_bl_data->check_fb = bl_data->check_fb;  in samsung_bl_set()
127 	/* Register the Backlight dev */  in samsung_bl_set()
130 		printk(KERN_ERR "failed to register backlight device: %d\n", ret);  in samsung_bl_set()