[v4,1/2] dt-bindings: firmware: arm,scmi: support for parameter in smc/hvc call
Commit Message
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(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: Nikunj Kela <quic_nkela@quicinc.com>
---
Documentation/devicetree/bindings/firmware/arm,scmi.yaml | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
Comments
On Tue, 18 Apr 2023 11:56:58 -0700, Nikunj Kela wrote:
> 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(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: Nikunj Kela <quic_nkela@quicinc.com>
> ---
> Documentation/devicetree/bindings/firmware/arm,scmi.yaml | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
Reviewed-by: Rob Herring <robh@kernel.org>
@@ -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