Android5.1-s5p6818平台kernel部分背光驱动、注册

BlackSmith-2617

于 2016-12-03 18:10:38 发布

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分类专栏： LInux-ubuntu s6818-Android

本文链接：https://blog.youkuaiyun.com/zhaoqi2617/article/details/53446395

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This blog post discusses the configuration of backlight pins and PWM for the Android 5.1 operating system on the S5P6818 platform. The focus is on the settings found in the file ~/kernel/arch/arm/plat-s5p6818/partner/include/cfg_main.h.

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在Android5.1，6818平台，在路径：~/kernel/arch/arm/plat-s5p6818/~partner/include/cfg_main.h 里对背光引脚和PWM的配置：

#define	CFG_LVDS_PWM_IO				(PAD_GPIO_D+ 1)

/*------------------------------------------------------------------------------
 * 	PWM
 */
#ifdef CONFIG_UT_6818BV02 
#define BL_PWM_CH 2
#else
#define BL_PWM_CH 0
#endif 

#define CFG_LCD_PRI_PWM_CH						BL_PWM_CH
#define CFG_LCD_PRI_PWM_FREQ					30000
#define CFG_LCD_PRI_PWM_DUTYCYCLE				50		/* (%) */

以上就是对背光管脚的配置，然后在路径：~/kernel/arch/arm/plat-s5p6818/~partner~/device.c下面设置管脚和通过结构体组装对应信息。

/*------------------------------------------------------------------------------
 * backlight : generic pwm device
 */
#if defined(CONFIG_BACKLIGHT_PWM)
#include <linux/pwm_b

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