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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pwm/pwm-amlogic.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Amlogic PWM
maintainers:
- Heiner Kallweit <hkallweit1@gmail.com>
properties:
compatible:
oneOf:
- enum:
- amlogic,meson8b-pwm
- amlogic,meson-gxbb-pwm
- amlogic,meson-gxbb-ao-pwm
- amlogic,meson-axg-ee-pwm
- amlogic,meson-axg-ao-pwm
- amlogic,meson-g12a-ee-pwm
- amlogic,meson-g12a-ao-pwm-ab
- amlogic,meson-g12a-ao-pwm-cd
deprecated: true
- items:
- const: amlogic,meson-gx-pwm
- const: amlogic,meson-gxbb-pwm
deprecated: true
- items:
- const: amlogic,meson-gx-ao-pwm
- const: amlogic,meson-gxbb-ao-pwm
deprecated: true
- items:
- const: amlogic,meson8-pwm
- const: amlogic,meson8b-pwm
deprecated: true
- enum:
- amlogic,meson8-pwm-v2
- amlogic,meson-s4-pwm
- items:
- enum:
- amlogic,meson8b-pwm-v2
- amlogic,meson-gxbb-pwm-v2
- amlogic,meson-axg-pwm-v2
- amlogic,meson-g12-pwm-v2
- const: amlogic,meson8-pwm-v2
reg:
maxItems: 1
clocks:
minItems: 1
maxItems: 4
clock-names:
minItems: 1
maxItems: 2
"#pwm-cells":
const: 3
required:
- compatible
- reg
allOf:
- $ref: pwm.yaml#
- if:
properties:
compatible:
contains:
enum:
- amlogic,meson8-pwm
- amlogic,meson8b-pwm
- amlogic,meson-gxbb-pwm
- amlogic,meson-gxbb-ao-pwm
- amlogic,meson-axg-ee-pwm
- amlogic,meson-axg-ao-pwm
- amlogic,meson-g12a-ee-pwm
- amlogic,meson-g12a-ao-pwm-ab
- amlogic,meson-g12a-ao-pwm-cd
then:
# Obsolete historic bindings tied to the driver implementation
# The clocks provided here are meant to be matched with the input
# known (hard-coded) in the driver and used to select pwm clock
# source. Currently, the linux driver ignores this.
# This is kept to maintain ABI backward compatibility.
properties:
clocks:
maxItems: 2
clock-names:
oneOf:
- items:
- enum: [clkin0, clkin1]
- items:
- const: clkin0
- const: clkin1
# Newer binding where clock describe the actual clock inputs of the pwm
# block. These are necessary but some inputs may be grounded.
- if:
properties:
compatible:
contains:
enum:
- amlogic,meson8-pwm-v2
then:
properties:
clocks:
minItems: 1
items:
- description: input clock 0 of the pwm block
- description: input clock 1 of the pwm block
- description: input clock 2 of the pwm block
- description: input clock 3 of the pwm block
clock-names: false
required:
- clocks
# Newer IP block take a single input per channel, instead of 4 inputs
# for both channels
- if:
properties:
compatible:
contains:
enum:
- amlogic,meson-s4-pwm
then:
properties:
clocks:
items:
- description: input clock of PWM channel A
- description: input clock of PWM channel B
clock-names: false
required:
- clocks
additionalProperties: false
examples:
- |
pwm@8550 {
compatible = "amlogic,meson-gxbb-pwm";
reg = <0x08550 0x10>;
clocks = <&xtal>, <&xtal>;
clock-names = "clkin0", "clkin1";
#pwm-cells = <3>;
};
- |
pwm@2000 {
compatible = "amlogic,meson8-pwm-v2";
reg = <0x1000 0x10>;
clocks = <&xtal>, <0>, <&fdiv4>, <&fdiv5>;
#pwm-cells = <3>;
};
- |
pwm@1000 {
compatible = "amlogic,meson-s4-pwm";
reg = <0x1000 0x10>;
clocks = <&pwm_src_a>, <&pwm_src_b>;
#pwm-cells = <3>;
};
|
