How to enable RTC auto drop function？

[DESCRIPTION]

–用于解决电池松动/瞬间弹开自动保护功能,能让系统自动重开机,而不必再次按PWRKEY开机
•电池掉电-> 2sec内上电->系统自动开机
–解决跌落掉电问题(Brief Battery disconnect)

[SOLUTION]

该function 默认在82已经支援，72需先申请patch ID:ALPS00904772
并做如下customize：
–Preloader
•Add define in alps\mediatek\custom\$PROJECT\preloader\inc\cust_rtc.h
#define RTC_2SEC_REBOOT_ENABLE 1
#define RTC_2SEC_MODE 0
–RTC_2SEC_MODE
0: 0.5 second
1: 1 second
2: 2 seconds
3: never power down (BBPU always high)
–LK
•alps\mediatek\custom\$PROJECT\lk\include\target\ 添加文件cust_rtc.h 并在
文件中加入如下define
#define RTC_2SEC_REBOOT_KPOC_BOOT 1 //auto reboot to KPOC when charger in
#define RTC_2SEC_REBOOT_ENABLE 1 //add here
內部MP后有陆续完善该功能，建议贵司确认如下patch 是否有上:
MT6572: ALPS00963803
MT6582: ALPS01021354
Thanks.