linux-kernel - [PATCH v3 6/6] regulator: dt-bindings: rtq2208: Add property to get ldo of RTQ2208 is adjustable or not

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Date: Fri, 10 May 2024 20:06:25 +0800
From: Alina Yu <alina_yu@...htek.com>
To: <lgirdwood@...il.com>, <broonie@...nel.org>, <robh+dt@...nel.org>,
	<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<alina_yu@...htek.com>, <johnny_lai@...htek.com>, <cy_huang@...htek.com>
Subject: [PATCH v3 6/6] regulator: dt-bindings: rtq2208: Add property to get ldo of RTQ2208 is adjustable or not

Since there is no way to check is ldo is adjustable or not.
As discussing in v2 series, 'richtek,fixed-microvolt' is added for that.
user is supposed to know whether vout of ldo is adjustable.

Signed-off-by: Alina Yu <alina_yu@...htek.com>
---
 Documentation/devicetree/bindings/regulator/richtek,rtq2208.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/regulator/richtek,rtq2208.yaml b/Documentation/devicetree/bindings/regulator/richtek,rtq2208.yaml
index 609c066..6212f44 100644
--- a/Documentation/devicetree/bindings/regulator/richtek,rtq2208.yaml
+++ b/Documentation/devicetree/bindings/regulator/richtek,rtq2208.yaml
@@ -75,6 +75,13 @@ properties:
         description:
           regulator description for ldo[1-2].
 
+        properties:
+          richtek,fixed-microvolt:
+            description: |
+              If it exists, the voltage is unadjustable.
+              There is no risk-free method for software to determine whether the ldo vout is fixed or not.
+              Therefore, it can only be done in this way.
+
 required:
   - compatible
   - reg
@@ -177,6 +184,7 @@ examples:
             };
           };
           ldo1 {
+            richtek,fixed-microvolt = <1200000>;
             regulator-min-microvolt = <1200000>;
             regulator-max-microvolt = <1200000>;
             regulator-always-on;
-- 
2.7.4