linux-kernel - [RFC PATCH 7/7] dt-bindings: motion: Add motion-simple-pwm bindings

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Message-ID: <20250227162823.3585810-8-david@protonic.nl>
Date: Thu, 27 Feb 2025 17:28:23 +0100
From: David Jander <david@...tonic.nl>
To: linux-kernel@...r.kernel.org
Cc: linux-iio@...r.kernel.org,
	Jonathan Corbet <corbet@....net>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org,
	Nuno Sa <nuno.sa@...log.com>,
	Jonathan Cameron <jic23@...nel.org>,
	Oleksij Rempel <o.rempel@...gutronix.de>,
	David Jander <david@...tonic.nl>
Subject: [RFC PATCH 7/7] dt-bindings: motion: Add motion-simple-pwm bindings

Add device-tree bindings for simple Linux Motion Control devices that
are based on 1 or 2 PWM outputs.

Signed-off-by: David Jander <david@...tonic.nl>
---
 .../bindings/motion/motion-simple-pwm.yaml    | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/motion/motion-simple-pwm.yaml

diff --git a/Documentation/devicetree/bindings/motion/motion-simple-pwm.yaml b/Documentation/devicetree/bindings/motion/motion-simple-pwm.yaml
new file mode 100644
index 000000000000..409e3aef6f3f
--- /dev/null
+++ b/Documentation/devicetree/bindings/motion/motion-simple-pwm.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/motion/motion-simple-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Simple PWM based motor controller
+
+maintainers:
+  - David Jander <david@...tonic>
+
+description: |
+   Simple motor control device based on 1 or 2 PWM outputs
+
+properties:
+  compatible:
+    enum:
+      - motion-simple-pwm
+
+  pwms:
+    maxItems: 2
+
+  pwm-names:
+    maxItems: 2
+
+  motion,pwm-inverted:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      If present, this flag indicates that the PWM signal should be inverted.
+      The duty-cycle will be scaled from 100% down to 0% instead 0% to 100%.
+
+required:
+  - compatible
+  - pwms
+
+allOf:
+  - $ref: /schemas/motion/common.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    // This example shows how to use the TI DRV8873 or similar motor controllers
+    // with this driver
+    motion-simple-pwm0 {
+      compatible = "motion-simple-pwm";
+      pwms = <&hpdcm0_pwm 0 50000 0>,
+             <&hpdcm0_pwm 1 50000 0>;
+      pwm-names = "left", "right";
+      motion,pwm-inverted;
+      motion,speed-conv-mul = <3600>;
+      motion,speed-conv-div = <100000>;
+      motion,acceleration-conv-mul = <3600>;
+      motion,acceleration-conv-div = <100000>;
+    };
-- 
2.47.2