Verified on UC-7112-LX by buzzing the buzzer and writing the RTC (see log [1] for next-20170310): [1] https://bitbucket.org/Kasreyn/linux-next/commits/c63f3c2215f6fd106ff0ec6f9864b85b7be565ac [ 0.000000] Linux version 4.11.0-rc1-next-20170310-00004-gc63f3c2 (i@ildjarn) (gcc version 4.9.1 (crosstool-NG 1.20.0) ) #4461 PREEMP T Tue Mar 21 11:43:29 CET 2017 .. echo 24 > /sys/class/gpio/export echo out > /sys/class/gpio/gpio24/direction echo 1 > /sys/class/gpio/gpio24/value echo 0 > /sys/class/gpio/gpio24/value .. date +%Y%m%d%h%m -s "201001202323" hwclock -w reboot .. [ 4.520000] moxart-rtc 90000000.soc:rtc: setting system clock to 2010-01-20 23:23:20 UTC (1264029800) .. date +%Y%m%d%h%m -s "201212181553" hwclock -w reboot .. [ 4.520000] moxart-rtc 90000000.soc:rtc: setting system clock to 2012-12-18 15:53:20 UTC (1355846000) Tested-by: Jonas Jensen <jonas.jensen@xxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html