[PATCH v3 1/2] dt-bindings: pwm: Add T-HEAD PWM controller

[Jisheng Zhang]

T-HEAD SoCs such as the TH1520 contain a PWM controller used
to control the LCD backlight, fan and so on.

Signed-off-by: Jisheng Zhang <jszhang at kernel.org>
Reviewed-by: Rob Herring <robh at kernel.org>
---
 .../bindings/pwm/thead,th1520-pwm.yaml        | 44 +++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pwm/thead,th1520-pwm.yaml

diff --git a/Documentation/devicetree/bindings/pwm/thead,th1520-pwm.yaml b/Documentation/devicetree/bindings/pwm/thead,th1520-pwm.yaml
new file mode 100644
index 000000000000..e75d8e9f24c5
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/thead,th1520-pwm.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/thead,th1520-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: T-HEAD TH1520 PWM
+
+maintainers:
+  - Jisheng Zhang <jszhang at kernel.org>
+
+allOf:
+  - $ref: pwm.yaml#
+
+properties:
+  compatible:
+    enum:
+      - thead,th1520-pwm
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  "#pwm-cells":
+    const: 3
+
+required:
+  - compatible
+  - reg
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+
+    pwm at ec01c000 {
+        compatible = "thead,th1520-pwm";
+        reg = <0xec01c000 0x1000>;
+        clocks = <&clk 1>;
+        #pwm-cells = <3>;
+    };
-- 
2.40.1