> Date: Sat, 19 Jun 2021 14:02:53 -0400 > From: "Joe Gidi" <j...@entropicblur.com> > > I'd like to add a DS3231 RTC to my Asus Tinker Board, to make it more > suitable as an NTP server. I've done this with a Raspberry Pi in the past, > and it was trivial: just copy the appropriate device tree overlay to the > MS-DOS partition and add it to config.txt. > > Unfortunately, I'm struggling to figure out the correct way to enable the > RTC on this Rockchip-based system; it seems I need to do something with > U-Boot, but it's not clear what that "something" would be. > > Is anyone able to offer any guidance?
Apparently U-Boot can apply device tree overlays in a similar way as the raspberry pi formware can: https://u-boot.readthedocs.io/en/latest/usage/fdt_overlays.html Not sure if this functionality is enabled by default though.
