JZ_RTC_CTRL_1HZ
ctrl |= JZ_RTC_CTRL_1HZ | JZ_RTC_CTRL_AF;
if (ctrl & JZ_RTC_CTRL_1HZ)
jz4740_rtc_ctrl_set_bits(rtc, JZ_RTC_CTRL_1HZ | JZ_RTC_CTRL_AF, false);