RTC_COUNTER
ret = regmap_read(d->regmap, RTC_COUNTER, &counter);
return regmap_write(d->regmap, RTC_COUNTER, timestamp - d->rtc_bias);
ret = regmap_read(rtc->serial, RTC_COUNTER, &time);
return regmap_write(rtc->serial, RTC_COUNTER, rtc_tm_to_time64(tm));
ret = regmap_read(rtc->serial, RTC_COUNTER, &tm);