linux-kernel - [PATCH v3 1/2] dt-bindings: hwmon: amc6821: add fan and PWM output

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Message-Id: <20250331155229.147879-2-francesco@dolcini.it>
Date: Mon, 31 Mar 2025 17:52:28 +0200
From: Francesco Dolcini <francesco@...cini.it>
To: Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Farouk Bouabid <farouk.bouabid@...rry.de>,
	Quentin Schulz <quentin.schulz@...rry.de>
Cc: Francesco Dolcini <francesco.dolcini@...adex.com>,
	linux-hwmon@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 1/2] dt-bindings: hwmon: amc6821: add fan and PWM output

From: Francesco Dolcini <francesco.dolcini@...adex.com>

Add properties to describe the fan and the PWM controller output.

Link: https://www.ti.com/lit/gpn/amc6821
Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
---
v3:
 - explicitly describe the fan, use standard PWM and FAN bindings
 - pwm.yaml cannot be referenced, because of the $nodename pattern that is
   enforced there
v2: https://lore.kernel.org/all/20250224180801.128685-2-francesco@dolcini.it/
 - no changes
v1: https://lore.kernel.org/all/20250218165633.106867-2-francesco@dolcini.it/
---
 .../devicetree/bindings/hwmon/ti,amc6821.yaml      | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/hwmon/ti,amc6821.yaml b/Documentation/devicetree/bindings/hwmon/ti,amc6821.yaml
index 5d33f1a23d03..94aca9c378e6 100644
--- a/Documentation/devicetree/bindings/hwmon/ti,amc6821.yaml
+++ b/Documentation/devicetree/bindings/hwmon/ti,amc6821.yaml
@@ -28,6 +28,13 @@ properties:
   i2c-mux:
     type: object
 
+  fan:
+    $ref: fan-common.yaml#
+    unevaluatedProperties: false
+
+  "#pwm-cells":
+    const: 3
+
 required:
   - compatible
   - reg
@@ -50,9 +57,14 @@ examples:
         #address-cells = <1>;
         #size-cells = <0>;
 
-        fan@18 {
+        fan_controller: fan@18 {
             compatible = "ti,amc6821";
             reg = <0x18>;
+            #pwm-cells = <3>;
+
+            fan {
+                pwms = <&fan_controller 0 40000 0>;
+            };
         };
     };
 
-- 
2.39.5