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dt-bindings: pwm: Document clk based PWM controller
Add YAML devicetree binding for clk based PWM controller
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Nikita Travkin <nikita@trvn.ru>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
authored by
Nikita Travkin
and committed by
Thierry Reding
c2252c18
2375e964
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Documentation/devicetree/bindings/pwm/clk-pwm.yaml
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Documentation/devicetree/bindings/pwm/clk-pwm.yaml
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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/pwm/clk-pwm.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Clock based PWM controller
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maintainers:
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- Nikita Travkin <nikita@trvn.ru>
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description: |
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Some systems have clocks that can be exposed to external devices.
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(e.g. by muxing them to GPIO pins)
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It's often possible to control duty-cycle of such clocks which makes them
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suitable for generating PWM signal.
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allOf:
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- $ref: pwm.yaml#
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properties:
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compatible:
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const: clk-pwm
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clocks:
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description: Clock used to generate the signal.
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maxItems: 1
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"#pwm-cells":
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const: 2
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unevaluatedProperties: false
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required:
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- compatible
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- clocks
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examples:
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- |
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pwm {
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compatible = "clk-pwm";
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#pwm-cells = <2>;
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clocks = <&gcc 0>;
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pinctrl-names = "default";
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pinctrl-0 = <&pwm_clk_flash_default>;
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};