backlight驱动

devs.c 或者 dev-device_type.c里面是放device的地方，在三星平台上。想在板子上面写个背光驱动，但是估计自己写的又是IOCTL之类，接口肯定不标准，先看看kernel里面有没有标准的接口。先在头文件里面看了相关的结构体：struct backlight_ops { /* Notify the backlight driver some property has changed */ int (*update_status)(struct backlight_device *); /* Return the current backlight brightness (accounting for power,    fb_blank etc.) */ int (*get_brightness)(struct backlight_device *); /* Check if given framebuffer devi