On Tue, Jan 28, 2020 at 1:59 PM Steven A. Falco <stevenfalco(a)gmail.com> wrote:
I'd like to add an RTC module to a Raspberry Pi. I see that uboot has some support
for device tree overlays, but if I'm reading the code correctly, it doesn't seem
to be enabled for the Pi.
Is it possible to use device tree overlays at this point, or am I better off building a
custom kernel?
Yes, mostly, but there's still a whole bunch of corner cases, for
Raspberry Pi we use the Firmware provided DT and not the kernel DT.
It's only really clean on aarch64 and completely doesn't work on RPi4
(yet another reason there's been no announcement around RPi4 support).
Peter