linux-kernel - [PATCH v1 4/6] dt-bindings: firmware: arm,scmi: Introduce more transport properties

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Message-ID: <20240730144707.1647025-5-cristian.marussi@arm.com>
Date: Tue, 30 Jul 2024 15:47:05 +0100
From: Cristian Marussi <cristian.marussi@....com>
To: linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	arm-scmi@...r.kernel.org,
	devicetree@...r.kernel.org
Cc: sudeep.holla@....com,
	james.quinlan@...adcom.com,
	f.fainelli@...il.com,
	vincent.guittot@...aro.org,
	etienne.carriere@...com,
	peng.fan@....nxp.com,
	michal.simek@....com,
	quic_sibis@...cinc.com,
	quic_nkela@...cinc.com,
	dan.carpenter@...aro.org,
	souvik.chakravarty@....com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	Cristian Marussi <cristian.marussi@....com>
Subject: [PATCH v1 4/6] dt-bindings: firmware: arm,scmi: Introduce more transport properties

Depending on hardware and firmware design choices different platforms can
end-up having different requirements around transport features.

Introduce max-msg-size and max-msg properties to describe platform specific
transport constraints.

Signed-off-by: Cristian Marussi <cristian.marussi@....com>
---
 .../devicetree/bindings/firmware/arm,scmi.yaml    | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
index 7c9fa07e2ff2..998fde321d82 100644
--- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
+++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
@@ -128,6 +128,21 @@ properties:
       be a non-zero value if set.
     minimum: 1
 
+  max-msg-size:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      An optional value, expressed in bytes, representing the transport maximum
+      message size. The value should at least allow for the 4-bytes SCMI message
+      header to be transmitted if set.
+    minimum: 4
+
+  max-msg:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      An optional value representing the transport maximum number of concurrent
+      in-flight messages. The value should be a non-zero value if set.
+    minimum: 1
+
   arm,smc-id:
     $ref: /schemas/types.yaml#/definitions/uint32
     description:
-- 
2.45.2