#value_indexed
RTC_FEATURE_ALARM		0
RTC_FEATURE_ALARM_RES_MINUTE	1
RTC_FEATURE_NEED_WEEK_DAY	2
RTC_FEATURE_ALARM_RES_2S	3
RTC_FEATURE_UPDATE_INTERRUPT	4
RTC_FEATURE_CORRECTION		5
RTC_FEATURE_BACKUP_SWITCH_MODE	6
RTC_FEATURE_ALARM_WAKEUP_ONLY	7
/* RTC_FEATURE_CNT - non-UAPI */
