Hi Thorm! On April 8, 2025 thus sayeth Thom Nichols: > I’d like to get bootcount support for the AM62 RTCSS. The RTCSS on > the AM62 is very similar to the AM33. In fact, I’m pretty sure the > bootcount_davinci driver would work for AM62, with just the register > address/ offset and KICK_WE constants redefined for the correct AM62 > values. A while back I tested the AM62 scratch register from > userspace [1] and confirmed it works the same as the AM33. >
Wonderful! It is a different IP from the AM335 but not completely different however I think your approach should work. > I’ve never contributed to u-boot but I believe I could get a working > PR that modifies the davinci_bootcount driver, if this would be > acceptable. > You should feel free to start if you want! U-Boot is very welcoming in this regard. The more devs we have in U-Boot the better :) > Alternately I don’t know if there’s any near-term plan for any of the > AM62 maintainers to port the rtc driver so that bootcount/rtc could be > used. I think doing this would be beyond my capabilities. > So we do have some plans to improve RTC support in both in Linux and in U-Boot to extend some features needed for the latest Sitara class SoC but I'm unsure about timelines. I've added a ticket internally to track this if we get to it before you do though :) ~Bryan > Thanks in advance. > > Thom Nichols > > 1. https://github.com/VoltServer/uboot-bootcount/pull/15/files
