imx6ul RTC error

zhangbin_eos — Sat, 05 Sep 2020 05:07:28 GMT

The RTC time is faster than the system time,

RTC time 120s : system time 100s

#test RTC root@VS-34FD:~# date -s "2020-09-05 12:06:51" Sat Sep 5 12:06:51 UTC 2020 root@VS-34FD:~# hwclock -w root@VS-34FD:~# date '+%a %b %e %H:%M:%S %Y' && hwclock -r Sat Sep 5 12:06:51 2020 Sat Sep 5 12:06:51 2020 0.000000 seconds #wait 100s root@VS-34FD:~# date '+%a %b %e %H:%M:%S %Y' && hwclock -r Sat Sep 5 12:08:30 2020 Sat Sep 5 12:08:51 2020 0.000000 seconds

I don't know where to modify this deviation. Please help me

Re: imx6ul RTC error

zhangbin_eos — Sat, 05 Sep 2020 05:11:14 GMT

kernel : imx_4.1.15_2.0.0

dts:

&clks { assigned-clocks = <&clks IMX6UL_CLK_PLL4_AUDIO_DIV>; assigned-clock-rates = <786432000>; }; ... snvs: snvs@020cc000 { compatible = "fsl,sec-v4.0-mon", "syscon", "simple-mfd"; reg = <0x020cc000 0x4000>; snvs_rtc: snvs-rtc-lp { compatible = "fsl,sec-v4.0-mon-rtc-lp"; regmap = <&snvs>; offset = <0x34>; interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>, <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>; }; snvs_poweroff: snvs-poweroff { compatible = "syscon-poweroff"; regmap = <&snvs>; offset = <0x38>; mask = <0x61>; }; snvs_pwrkey: snvs-powerkey { compatible = "fsl,sec-v4.0-pwrkey"; regmap = <&snvs>; interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>; linux,keycode = <KEY_POWER>; wakeup; }; };

i.MX Processorsのトピックimx6ul RTC error

imx6ul RTC error

Re: imx6ul RTC error