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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>;
+ };