Can I suggest as a future enhancement adding an option to also be able to read U_BOOT_EPOCH from env? Userspace tools could write the time on shutdown (like fakehwclock). Ok, adding `date xxxxx` to the start script could work too, but it seems messy.
Pablo.
On 25/10/20 04:13, Heinrich Schuchardt wrote:
On a board without hardware clock this software real time clock can be used. The build time is used to initialize the RTC. So you will have to adjust the time either manually using the 'date' command or use the 'sntp' to update the RTC with the time from a network time server. See CONFIG_CMD_SNTP and CONFIG_BOOTP_NTPSERVER. The RTC time is advanced according to CPU ticks.
v2: more elaborate Kconfig message adjust device name properties use build time as initial time
Heinrich Schuchardt (2): Makefile: provide constant with seconds since epoch rtc: provide an emulated RTC
MAINTAINERS | 1 + Makefile | 2 ++ drivers/rtc/Kconfig | 11 ++++++ drivers/rtc/Makefile | 1 + drivers/rtc/emul_rtc.c | 80 ++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 95 insertions(+) create mode 100644 drivers/rtc/emul_rtc.c
-- 2.28.0