【转】Android驱动开发之earlysuspend睡眠模式编程总结

时间:2022-03-17 07:30:43

原文网址:http://blog.csdn.net/bigapple88/article/details/8669537

(1)添加头文件:

#include <linux/earlysuspend.h>

(2)在特定驱动结构体中添加early_suspend结构:

#ifdef CONFIG_HAS_EARLYSUSPEND
struct early_suspend early_suspend;
#endif

(3)在驱动probe函数中注册相关early_suspend结构体:

#ifdef CONFIG_HAS_EARLYSUSPEND
ftk_ts->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
ftk_ts->early_suspend.suspend = stm_ts_early_suspend;
ftk_ts->early_suspend.resume =stm_ts_late_resume;
register_early_suspend(&ftk_ts->early_suspend);
#endif

(4)在驱动remove函数取消early_suspend结构体的注册:

#ifdef CONFIG_HAS_EARLYSUSPEND
unregister_early_suspend(&ts->early_suspend);
#endif

(5)定义相关suspend和resume函数:

#ifdef CONFIG_HAS_EARLYSUSPEND
static void stm_ts_early_suspend(struct early_suspend *h)
{
struct ftk_ts *ts;
ts = container_of(h, struct ftk_ts, early_suspend);
stm_ts_suspend(ts->client, PMSG_SUSPEND);
}

static void stm_ts_late_resume(struct early_suspend *h)
{
struct ftk_ts *ts;
ts = container_of(h, struct ftk_ts, early_suspend);
stm_ts_resume(ts->client);
}
#endif

(6)在系统驱动结构体中设置未使用earlysuspend的函数接口:

#ifndef CONFIG_HAS_EARLYSUSPEND
.suspend = stm_ts_suspend,
.resume = stm_ts_resume,
#endif