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From:   Ulf Hansson <ulf.hansson@linaro.org>
To:     Sudeep Holla <sudeep.holla@arm.com>,
        Cristian Marussi <cristian.marussi@arm.com>,
        Viresh Kumar <vireshk@kernel.org>, Nishanth Menon <nm@ti.com>,
        Stephen Boyd <sboyd@kernel.org>
Cc:     Nikunj Kela <nkela@quicinc.com>,
        Prasad Sodagudi <psodagud@quicinc.com>,
        Alexandre Torgue <alexandre.torgue@foss.st.com>,
        Ulf Hansson <ulf.hansson@linaro.org>, linux-pm@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>, devicetree@vger.kernel.org
Subject: [PATCH v2 08/11] dt-bindings: firmware: arm,scmi: Extend bindings for protocol@13
Date:   Thu, 13 Jul 2023 16:17:35 +0200
Message-Id: <20230713141738.23970-9-ulf.hansson@linaro.org>
In-Reply-To: <20230713141738.23970-1-ulf.hansson@linaro.org>
References: <20230713141738.23970-1-ulf.hansson@linaro.org>
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The protocol@13 node is describing the performance scaling option for the
ARM SCMI interface, as a clock provider. This is unnecessary limiting, as
performance scaling is in many cases not limited to switching a clock's
frequency.

Therefore, let's extend the binding so the interface can be modelled as a
generic performance domaintoo. The common way to describe this, is to use
the "power-domain" DT bindings, so let's use that.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

Changes in v2:
	- Updated the DT binding to require "oneOf" #power-domain-cells or
	#clock-cells.

---
 .../devicetree/bindings/firmware/arm,scmi.yaml        | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
index b138f3d23df8..563a87dfb31a 100644
--- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
+++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
@@ -149,8 +149,15 @@ properties:
       '#clock-cells':
         const: 1
 
-    required:
-      - '#clock-cells'
+      '#power-domain-cells':
+        const: 1
+
+    oneOf:
+      - required:
+          - '#clock-cells'
+
+      - required:
+          - '#power-domain-cells'
 
   protocol@14:
     $ref: '#/$defs/protocol-node'
-- 
2.34.1