Hi Andrey, On 23-09-05 09:27, Andre Przywara wrote: > On Mon, 4 Sep 2023 23:54:30 +0300 > Andrey Skvortsov <andrej.skvort...@gmail.com> wrote: > > Hi Andrey, > > > When using SCPI as the PSCI backend, firmware can wake up the CPUs and > > cluster from sleep, so CPU idle states are available for loaded OS to > > use. TF-A modifies DTB to advertise available CPU idle states, when > > SCPI is detected. This change copies nodes added by TF-A to any new > > dtb that is used for loaded OS. > > Why do you need that, exactly? Why not just use $fdtcontroladdr for the > kernel? We now keep the U-Boot copy of the .dts files in sync with the > kernel. If you need to modify the DT in U-Boot, for instance by applying > overlays, you can copy that DTB into a better suitable location first: > => fdt move $fdtcontroladdr $fdt_addr_r > > In any case, there shall be only one DT, that one in the U-Boot image. Why > do you need to load another one for the kernel?
extlinux is used by distributions (sometimes with device-specific changes especially for platforms not fully supported by mainline yet), then U-Boot loads DT defined in extlinux.conf file. u-boot scripts are not used in case of extlinux at all. -- Best regards, Andrey Skvortsov
