Commit 8f9d530c authored by Nikunj Kela's avatar Nikunj Kela Committed by Sudeep Holla
Browse files

dt-bindings: firmware: arm,scmi: support for parameter in smc/hvc call 



Currently, smc/hvc calls are made with smc-id only. The parameters are
all set to zeros. This change defines a new compatible string that can
be used to pass shmem address(4KB-page, offset) as two parameters in
SMC/HVC doorbell.

This is useful when multiple scmi instances are used with common smc-id.

Signed-off-by: default avatarNikunj Kela <quic_nkela@quicinc.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230506182428.25343-2-quic_nkela@quicinc.com


Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent ac9a7868

Documentation/devicetree/bindings/firmware/arm,scmi.yaml

+7 −1
Original line number Diff line number Diff line
@@ -34,6 +34,10 @@ properties: 
      - description: SCMI compliant firmware with ARM SMC/HVC transport

        items:

          - const: arm,scmi-smc

      - description: SCMI compliant firmware with ARM SMC/HVC transport

                     with shmem address(4KB-page, offset) as parameters

        items:

          - const: arm,scmi-smc-param

      - description: SCMI compliant firmware with SCMI Virtio transport.

                     The virtio transport only supports a single device.

        items:
@@ -299,7 +303,9 @@ else: 
    properties:

      compatible:

        contains:

          const: arm,scmi-smc

          enum:

            - arm,scmi-smc

            - arm,scmi-smc-param

  then:

    required:

      - arm,smc-id