Thanks Florian, > The PSCI binding itself has provision for specifying function IDs for > different functions, and this seems to be followed by other subsystems > as well like SCMI: > > https://www.spinics.net/lists/arm-kernel/msg791270.html Are you referring to this line in the devicetree linked? +- arm,smc-id : SMC id required when using smc or hvc transports I cannot find any prior definition of this in the devicetree yaml format, so I will add that as well. Did you have a link for the psci usage that you referenced? Thanks Evan