dt-bindings: pwm: convert pwm-bcm2835 bindings to YAML

Convert the DT binding document for pwm-bcm2835 from .txt to YAML.

Signed-off-by: Stefan Wahren <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Reviewed-by: Uwe Kleine-König <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>

Author: lategoodbye

Documentation/devicetree/bindings/pwm/pwm-bcm2835.txt

@@ -0,0 +1,43 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/pwm-bcm2835.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: BCM2835 PWM controller (Raspberry Pi controller)
+
+maintainers:
+  - Stefan Wahren <[email protected]>
+
+allOf:
+  - $ref: pwm.yaml#
+
+properties:
+  compatible:
+    const: brcm,bcm2835-pwm
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  "#pwm-cells":
+    const: 3
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - "#pwm-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    pwm@2020c000 {
+      compatible = "brcm,bcm2835-pwm";
+      reg = <0x2020c000 0x28>;
+      clocks = <&clk_pwm>;
+      #pwm-cells = <3>;
+    };