2022-02-21 02:42:34

by Nikita Travkin

Subject: [PATCH v6 1/2] dt-bindings: pwm: Document clk based PWM controller

Add YAML devicetree binding for clk based PWM controller

Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Nikita Travkin <[email protected]>
--
Changes in v2:
- fix the file name.
Changes in v4:
- Use generic node name in the dt bindings example.
Changes in v5:
- make compatible required
---
.../devicetree/bindings/pwm/clk-pwm.yaml | 46 +++++++++++++++++++
1 file changed, 46 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pwm/clk-pwm.yaml

diff --git a/Documentation/devicetree/bindings/pwm/clk-pwm.yaml b/Documentation/devicetree/bindings/pwm/clk-pwm.yaml
new file mode 100644
index 000000000000..ec1768291503
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/clk-pwm.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/clk-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Clock based PWM controller
+
+maintainers:
+ - Nikita Travkin <[email protected]>
+
+description: |
+ Some systems have clocks that can be exposed to external devices.
+ (e.g. by muxing them to GPIO pins)
+ It's often possible to control duty-cycle of such clocks which makes them
+ suitable for generating PWM signal.
+
+allOf:
+ - $ref: pwm.yaml#
+
+properties:
+ compatible:
+ const: clk-pwm
+
+ clocks:
+ description: Clock used to generate the signal.
+ maxItems: 1
+
+ "#pwm-cells":
+ const: 2
+
+unevaluatedProperties: false
+
+required:
+ - compatible
+ - clocks
+
+examples:
+ - |
+ pwm {
+ compatible = "clk-pwm";
+ #pwm-cells = <2>;
+ clocks = <&gcc 0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pwm_clk_flash_default>;
+ };
--
2.34.1

2022-02-23 19:31:52

by Rob Herring (Arm)

Subject: Re: [PATCH v6 1/2] dt-bindings: pwm: Document clk based PWM controller

On Sun, 20 Feb 2022 16:50:29 +0500, Nikita Travkin wrote:
> Add YAML devicetree binding for clk based PWM controller
>
> Reviewed-by: Krzysztof Kozlowski <[email protected]>
> Signed-off-by: Nikita Travkin <[email protected]>
> --
> Changes in v2:
> - fix the file name.
> Changes in v4:
> - Use generic node name in the dt bindings example.
> Changes in v5:
> - make compatible required
> ---
> .../devicetree/bindings/pwm/clk-pwm.yaml | 46 +++++++++++++++++++
> 1 file changed, 46 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pwm/clk-pwm.yaml
>

Reviewed-by: Rob Herring <[email protected]>