ds1685_rtc_read_alarm(9)

📦 version 7.3.1, in nixpkgs unstable

✨ ds1685_rtc_read_alarm(9) — Kernel API Manual ✨

okay bestie, this is the page for ds1685_rtc_read_alarm from the Kernel API Manual, and it's literally all about reading the alarm registers. group-chat huddle time 💖

🌸 NAME 🌸

ds1685_rtc_read_alarm — reads the alarm registers. periodt. 💅

💫 SYNOPSIS 💫

int ds1685_rtc_read_alarm (struct device *dev , struct rtc_wkalrm *alrm
);

🎀 ARGUMENTS 🎀

  • dev — pointer to device structure. 🫶
  • alrm — pointer to rtc_wkalrm structure. 😭

🦋 DESCRIPTION 🦋

so there are three primary alarm registers: seconds, minutes, and hours. iconic trio, no cap. ⏰✨

there's also a fourth alarm register for the month date, and it's available in bank1 for kickstart/wakeup features. main character energy in a whole extra register, honestly. 🎀

the DS1685/DS1687 manual states that a "don't care" value ranging from 0xc0 to 0xff may be written into one or more of the three alarm bytes to act as a wildcard value. yup, wildcard vibes are supported there. 🌈

heads up bestie: the fourth byte doesn't support a "don't care" value. that one is not invited to the wildcard party. 🚫💀

🌈 SEE ALSO 🌈

the Kernel file is ./drivers/rtc/rtc-ds1685.c, and the whole friend group is:

xoxo bestie, this one's from ./drivers/rtc, October 2026 edition 💅💖🦋

📦 where this page comes from