stm32mp1 rtc uboot issue

[Ara.1]

Hi All,

In STM32MP1, i have following two problem related RTC

1. Kernel space

RTC is working fine for me only when i enter following command at every power up , else the default RTC date show local time.

hwclock --localtime --hctosys-- makes RTC works.

root@mp1som:~# date

Mon Sep 7 06:16:00 UTC 2020

root@mp1som:~# hwclock --localtime --hctosys

root@mp1som:~# date

Mon May 26 11:22:49 UTC 2014

2 , Uboot side always shows default RTC time. why this ?

following is uboot log:

U-Boot SPL 2018.11-stm32mp-r3 (Dec 18 2020 - 10:05:24 +0000)

Model: STMicroelectronics STM32MP157A-DK1 Discovery Board

RAM: DDR3-DDR3L 32bits 533000Khz

Trying to boot from MMC1

U-Boot 2018.11-stm32mp-r3 (Dec 18 2020 - 10:05:24 +0000)

CPU: STM32MP157CAA Rev.B

Model: STMicroelectronics STM32MP157A-DK1 Discovery Board

Board: stm32mp1 in basic mode (st,stm32mp157a-dk1)

[Olivier GALLIEN]

Hi @Ara.1​ ,

I read "U-Boot SPL 2018.11-stm32mp-r3" which make me think you are trying to use "basic boot" mode on old V1.2 ecosystem.

Is it on purpose ?

You may be aware that this basic boot scheme is not recommended and even deprecated in V2.x version.

If not already done please read https://wiki.st.com/stm32mpu-ecosystem-v1/wiki/Boot_chains_overview#STM32MP_boot_chains

and related comment about basic.

I also read "root@mp1som".

I you confirm you are using a part from SOM maker integrating STM32MP1, please be aware that the SOM maker is your first and main support contact.

Olivier

[Ara.1]

Hi

its working now.

as the distro uses default system time than local time.

this works by using

hwclock -s

at every power up