JZ_REG_RTC_CTRL
ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
ret = jz4740_rtc_reg_write(rtc, JZ_REG_RTC_CTRL, ctrl);
ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
ctrl = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL);
return readl_poll_timeout(rtc->base + JZ_REG_RTC_CTRL, ctrl,