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From:   David Collins <quic_collinsd@quicinc.com>
To:     Rob Herring <robh+dt@kernel.org>,
        Sudeep Holla <sudeep.holla@arm.com>,
        <devicetree@vger.kernel.org>
CC:     David Collins <quic_collinsd@quicinc.com>,
        Mark Brown <broonie@kernel.org>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Cristian Marussi <cristian.marussi@arm.com>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>,
        "Subbaraman Narayanamurthy" <quic_subbaram@quicinc.com>
Subject: [RESEND PATCH 1/2] dt-bindings: firmware: arm,scmi: define support for name based regulators
Date:   Mon, 24 Jan 2022 16:27:35 -0800
Message-ID: <fcd130891cc1d52cb09b8bfc866ab7ef1ce3b2a1.1643069954.git.quic_collinsd@quicinc.com>
In-Reply-To: <cover.1643069954.git.quic_collinsd@quicinc.com>
References: <cover.1643069954.git.quic_collinsd@quicinc.com>
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Allow SCMI regulator subnodes to be specified either by ID using
the "reg" property or by name using the "regulator-name" property.

Name based SCMI regulator specification helps ensure that an SCMI
agent doesn't need to be aware of the numbering scheme used for
Voltage Domains by the SCMI platform.  It also ensures that the
correct Voltage Domain is selected for a given physical regulator.
This cannot be guaranteed with numeric Voltage Domain IDs alone.

Signed-off-by: David Collins <quic_collinsd@quicinc.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/firmware/arm,scmi.yaml        | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
index 5c4c6782e052..bc4a84fe25d2 100644
--- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
+++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
@@ -155,7 +155,7 @@ properties:
           The list of all regulators provided by this SCMI controller.
 
         patternProperties:
-          '^regulators@[0-9a-f]+$':
+          '^regulator.+$':
             type: object
             $ref: "../regulator/regulator.yaml#"
 
@@ -164,8 +164,13 @@ properties:
                 maxItems: 1
                 description: Identifier for the voltage regulator.
 
-            required:
-              - reg
+              regulator-name: true
+
+            anyOf:
+              - required:
+                  - reg
+              - required:
+                  - regulator-name
 
 additionalProperties: false
 
-- 
2.17.1