On Sun, Jun 18, 2023 at 12:15:21AM +0800, Jisheng Zhang wrote: > Sipeed's Lichee Pi 4A development board uses Lichee Module 4A core > module which is powered by T-HEAD's TH1520 SoC. Add minimal device > tree files for the core module and the development board. > > Support basic uart/gpio/dmac drivers, so supports booting to a basic > shell. > > NOTE: the thead cpu reset dt-binding and DT node are removed in v3. This > makes secondary CPUs unable to be online. However, minimal th1520 > support is better than nothing. And the community has been working on > and will work on the cpu reset dt-binding, for example, Conor, Guo and > Jessica are discussing about it, I have seen valuable comments and > inputs from them. I believe we can add back cpu reset in next > development window. I'm interested in starting the secondary cpus on mainline. It seems that that "thead,reset-sample" is already implemented in upstream OpenSBI in lib/utils/reset/fdt_reset_thead.c and the issue is getting the dt-binding accepted. Is that correct? It looks like you've tried to restart the discussion on the DT list [1] so I hope that the DT maintainers will give their perspective. Thank you, Drew [1] https://lore.kernel.org/all/ZNURXBKkYdiWLanf@xhacker/
