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Subject[PATCH v3 1/2] dt-bindings: firmware: arm,scmi: support for parameter in smc/hvc call
Date
Currently, smc/hvc calls are made with smc-id only. The parameters are
all set to zeros. This patch defines a new compatible string that can
be used to pass shmem address as one parameter in SMC/HVC doorbell.

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

Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
---
Documentation/devicetree/bindings/firmware/arm,scmi.yaml | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
index 5824c43e9893..e1f39a10d405 100644
--- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
+++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
@@ -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 as parameter
+ 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
--
2.17.1
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