Messages in this thread Patch in this message | | | From | Nikunj Kela <> | Subject | [PATCH v2 1/2] dt-bindings: firmware: arm,scmi: support parameter passing in smc/hvc | Date | Mon, 10 Apr 2023 11:20:57 -0700 |
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Currently, smc/hvc calls are made with smc-id only. The parameters are all set to zeros. This patch defines two optional device tree bindings, that can be used to pass parameters in smc/hvc calls.
This is useful when multiple scmi instances are used with common smc-id.
Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com> --- .../devicetree/bindings/firmware/arm,scmi.yaml | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml index 5824c43e9893..ecf76b763c8c 100644 --- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml +++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml @@ -115,6 +115,23 @@ properties: description: SMC id required when using smc or hvc transports + arm,smc32-params: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + An optional parameter list passed in smc32 or hvc32 calls + default: 0 + minItems: 1 + maxItems: 6 + + arm,smc64-params: + $ref: /schemas/types.yaml#/definitions/uint64-array + description: + An optional parameter list passed in smc64 or hvc64 calls. + This is valid only on ARM64 machines. + default: 0 + minItems: 1 + maxItems: 6 + linaro,optee-channel-id: $ref: /schemas/types.yaml#/definitions/uint32 description: @@ -427,6 +444,7 @@ examples: compatible = "arm,scmi-smc"; shmem = <&cpu_scp_lpri0>, <&cpu_scp_lpri1>; arm,smc-id = <0xc3000001>; + arm,smc64-params = <0xcd974d6c 0x5ed97289>; #address-cells = <1>; #size-cells = <0>; -- 2.17.1
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