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diff --git a/Documentation/devicetree/bindings/pwm/pwm.yaml b/Documentation/devicetree/bindings/pwm/pwm.yaml
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+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PWM controllers (providers)
+
+maintainers:
+  - Thierry Reding <thierry.reding@gmail.com>
+
+select: false
+
+properties:
+  $nodename:
+    pattern: "^pwm(@.*|-([0-9]|[1-9][0-9]+))?$"
+
+  "#pwm-cells":
+    description: |
+      Number of cells in a PWM specifier. Typically the cells represent, in
+      order: the chip-relative PWM number, the PWM period in nanoseconds and
+      optionally a number of flags (defined in <dt-bindings/pwm/pwm.h>).
+
+required:
+  - "#pwm-cells"
+
+additionalProperties: true
+
+examples:
+  - |
+    pwm: pwm@1c20e00 {
+        compatible = "allwinner,sun7i-a20-pwm";
+        reg = <0x01c20e00 0xc>;
+        clocks = <&osc24M>;
+        #pwm-cells = <3>;
+    };