linux-kernel - [PATCH 1/3] dt-bindings: regulator: add pca9450: Add regulator-allowed-modes

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Message-ID: <20250522192325.1099680-1-martijn.de.gouw@prodrive-technologies.com>
Date: Thu, 22 May 2025 21:23:22 +0200
From: Martijn de Gouw <martijn.de.gouw@...drive-technologies.com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, "Rob
 Herring" <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, "Conor
 Dooley" <conor+dt@...nel.org>, Robin Gong <yibin.gong@....com>
CC: Martijn de Gouw <martijn.de.gouw@...drive-technologies.com>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: [PATCH 1/3] dt-bindings: regulator: add pca9450: Add regulator-allowed-modes

The PCA9450 has support for forced PWM mode on the buck controllers.
Add support to control this mode.

Signed-off-by: Martijn de Gouw <martijn.de.gouw@...drive-technologies.com>
---
 .../bindings/regulator/nxp,pca9450-regulator.yaml  | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml b/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml
index 4ffe5c3faea07..c7327474c64ba 100644
--- a/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml
+++ b/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml
@@ -100,6 +100,15 @@ properties:
               PMIC default "STANDBY" state voltage in uV. Only Buck1~3 have such
               dvs(dynamic voltage scaling) property.
 
+          regulator-allowed-modes:
+            description: |
+              Buck regulator operating modes allowed. Valid values below.
+              Users should use the macros from dt-bindings/regulator/nxp,pca9450-regulator.h
+                0 (PCA9450_BUCK_MODE_AUTO): Auto PFM/PWM mode
+                1 (PCA9450_BUCK_MODE_FORCE_PWM): Forced PWM mode
+            items:
+              enum: [ 0, 1 ]
+
         unevaluatedProperties: false
 
     additionalProperties: false
@@ -143,6 +152,7 @@ allOf:
 examples:
   - |
     #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/regulator/nxp,pca9450-regulator.h>
 
     i2c {
         #address-cells = <1>;
@@ -179,6 +189,8 @@ examples:
                     regulator-max-microvolt = <3400000>;
                     regulator-boot-on;
                     regulator-always-on;
+                    regulator-inital-mode = <PCA9450_BUCK_MODE_FORCE_PWM>;
+                    regulator-allowed-modes = <PCA9450_BUCK_MODE_FORCE_PWM>;
                 };
                 buck5: BUCK5 {
                     regulator-name = "BUCK5";
@@ -186,6 +198,8 @@ examples:
                     regulator-max-microvolt = <3400000>;
                     regulator-boot-on;
                     regulator-always-on;
+                    regulator-allowed-modes = <PCA9450_BUCK_MODE_AUTO
+                                               PCA9450_BUCK_MODE_FORCE_PWM>;
                 };
                 buck6: BUCK6 {
                     regulator-name = "BUCK6";
-- 
2.39.2