Tool/software: Linux
Hi,
I m using yocto psdk-04.02.00.09. I have a externeal RTC ( MCP79410 ) in custom design and a battery connected to it.
I have verified the voltage and the crystal oscillator frequency which is supplied to the RTC in powered off time. Hardware wise it seems fine.
RTC using driver rtc-ds1307.c file.
Following the below procedure to set the time in system clock and HW clock :
root@am57xx-evm:~# date -s '2019-05-15 16:34:56'
Wed May 15 16:34:56 UTC 2019
root@am57xx-evm:~#
root@am57xx-evm:~# date
Wed May 15 16:34:58 UTC 2019
root@am57xx-evm:~#
root@am57xx-evm:~# hwclock -w
root@am57xx-evm:~#
root@am57xx-evm:~# hwclock --show
Wed May 15 16:35:13 2019 0.000000 seconds
root@am57xx-evm:~#
The default date and time after every reboot :
Mon Apr 29 05:17:45 UTC 2019
Even i have followed the below link and modified the Device Drivers > Real Time Clock > TI OMAP Real Time Clock to built-in (* instead of M)
Somewhere in driver or at the time of system boot, RTC getting the default time.
How to overcome this issue ? Please provide me the guidance.
