181 lines
4.4 KiB
YAML
181 lines
4.4 KiB
YAML
# 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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$id: http://devicetree.org/schemas/pwm/pwm-amlogic.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Amlogic PWM
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maintainers:
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- Heiner Kallweit <hkallweit1@gmail.com>
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properties:
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compatible:
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oneOf:
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- enum:
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- amlogic,meson8b-pwm
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- amlogic,meson-gxbb-pwm
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- amlogic,meson-gxbb-ao-pwm
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- amlogic,meson-axg-ee-pwm
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- amlogic,meson-axg-ao-pwm
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- amlogic,meson-g12a-ee-pwm
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- amlogic,meson-g12a-ao-pwm-ab
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- amlogic,meson-g12a-ao-pwm-cd
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deprecated: true
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- items:
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- const: amlogic,meson-gx-pwm
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- const: amlogic,meson-gxbb-pwm
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deprecated: true
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- items:
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- const: amlogic,meson-gx-ao-pwm
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- const: amlogic,meson-gxbb-ao-pwm
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deprecated: true
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- items:
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- const: amlogic,meson8-pwm
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- const: amlogic,meson8b-pwm
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deprecated: true
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- enum:
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- amlogic,meson8-pwm-v2
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- amlogic,meson-s4-pwm
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- items:
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- enum:
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- amlogic,meson-a1-pwm
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- const: amlogic,meson-s4-pwm
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- items:
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- enum:
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- amlogic,meson8b-pwm-v2
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- amlogic,meson-gxbb-pwm-v2
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- amlogic,meson-axg-pwm-v2
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- amlogic,meson-g12-pwm-v2
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- const: amlogic,meson8-pwm-v2
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reg:
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maxItems: 1
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clocks:
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minItems: 1
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maxItems: 4
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clock-names:
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minItems: 1
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maxItems: 2
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power-domains:
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maxItems: 1
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"#pwm-cells":
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const: 3
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required:
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- compatible
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- reg
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allOf:
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- $ref: pwm.yaml#
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- if:
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properties:
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compatible:
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contains:
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enum:
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- amlogic,meson8-pwm
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- amlogic,meson8b-pwm
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- amlogic,meson-gxbb-pwm
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- amlogic,meson-gxbb-ao-pwm
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- amlogic,meson-axg-ee-pwm
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- amlogic,meson-axg-ao-pwm
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- amlogic,meson-g12a-ee-pwm
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- amlogic,meson-g12a-ao-pwm-ab
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- amlogic,meson-g12a-ao-pwm-cd
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then:
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# Obsolete historic bindings tied to the driver implementation
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# The clocks provided here are meant to be matched with the input
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# known (hard-coded) in the driver and used to select pwm clock
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# source. Currently, the linux driver ignores this.
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# This is kept to maintain ABI backward compatibility.
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properties:
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clocks:
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maxItems: 2
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clock-names:
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oneOf:
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- items:
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- enum: [clkin0, clkin1]
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- items:
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- const: clkin0
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- const: clkin1
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# Newer binding where clock describe the actual clock inputs of the pwm
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# block. These are necessary but some inputs may be grounded.
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- if:
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properties:
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compatible:
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contains:
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enum:
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- amlogic,meson8-pwm-v2
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then:
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properties:
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clocks:
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minItems: 1
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items:
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- description: input clock 0 of the pwm block
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- description: input clock 1 of the pwm block
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- description: input clock 2 of the pwm block
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- description: input clock 3 of the pwm block
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clock-names: false
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required:
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- clocks
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# Newer IP block take a single input per channel, instead of 4 inputs
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# for both channels
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- if:
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properties:
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compatible:
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contains:
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enum:
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- amlogic,meson-s4-pwm
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then:
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properties:
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clocks:
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items:
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- description: input clock of PWM channel A
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- description: input clock of PWM channel B
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clock-names: false
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required:
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- clocks
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- if:
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properties:
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compatible:
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contains:
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enum:
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- amlogic,meson-a1-pwm
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then:
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required:
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- power-domains
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additionalProperties: false
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examples:
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- |
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pwm@8550 {
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compatible = "amlogic,meson-gxbb-pwm";
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reg = <0x08550 0x10>;
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clocks = <&xtal>, <&xtal>;
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clock-names = "clkin0", "clkin1";
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#pwm-cells = <3>;
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};
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- |
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pwm@2000 {
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compatible = "amlogic,meson8-pwm-v2";
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reg = <0x1000 0x10>;
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clocks = <&xtal>, <0>, <&fdiv4>, <&fdiv5>;
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#pwm-cells = <3>;
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};
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- |
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pwm@1000 {
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compatible = "amlogic,meson-s4-pwm";
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reg = <0x1000 0x10>;
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clocks = <&pwm_src_a>, <&pwm_src_b>;
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#pwm-cells = <3>;
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};
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