RTC_CTRL_A_RS_MASK
ctrla &= ~(RTC_CTRL_A_RS_MASK);
ds1685_rtc_pirq_rate[(ctrla & RTC_CTRL_A_RS_MASK)] : "none"),
ds1685_rtc_sqw_freq[(ctrla & RTC_CTRL_A_RS_MASK)] : "32768Hz"),