On Tue, Jan 24, 2023 at 03:56:19PM +0000, Abdellatif El Khlifi wrote:
I'd like to suggest the creation of a root node called arm_smccc as shown below.
Not sure if U-Boot already supports the existing binding of PSCI and OPTEE.
This node is the parent of all nodes using SMC calls like FF-A, PSCI, optee, ...
Well if you want to start with the clean slate for all new platforms, then it is a good way. But you don't need any of the child nodes as they can all be queried and discovered.
The first child to be integrated in the arm_smccc root node is FF-A. Hopefully, in the future the other features such as PSCI could be integrated under arm_smccc as well.
You don't need FF-A or any other node if the presence of SMCCC node indicates the support of SMCCC v1.1+(need to go back and check to confirm this). You can query the presence of all the feature. There is no need to have a node for each of the feature supported. That was the whole discussion of this thread IIUC.
-- Regards, Sudeep