linux-kernel - [PATCH v1 1/2] dt-bindings: hwmon: amc6821: add PWM polarity

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Message-Id: <20250218165633.106867-2-francesco@dolcini.it>
Date: Tue, 18 Feb 2025 17:56:32 +0100
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 v1 1/2] dt-bindings: hwmon: amc6821: add PWM polarity

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

Add property to describe the PWM-Out pin polarity.

Link: https://www.ti.com/lit/gpn/amc6821
Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
---
 Documentation/devicetree/bindings/hwmon/ti,amc6821.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/hwmon/ti,amc6821.yaml b/Documentation/devicetree/bindings/hwmon/ti,amc6821.yaml
index 5d33f1a23d03..11604aa41b3e 100644
--- a/Documentation/devicetree/bindings/hwmon/ti,amc6821.yaml
+++ b/Documentation/devicetree/bindings/hwmon/ti,amc6821.yaml
@@ -28,6 +28,14 @@ properties:
   i2c-mux:
     type: object
 
+  ti,pwm-inverted:
+    type: boolean
+    description:
+      Set to make the PWM-Out pin go high (with an external pull-up resistor)
+      for 100% duty cycle (suitable for driving the fan using a NMOS device),
+      when not set the PWM-Out pin goes low for 100% duty cycle (suitable for
+      driving the fan using a PMOS device).
+
 required:
   - compatible
   - reg
-- 
2.39.5