diff options
Diffstat (limited to 'dts/Bindings/pwm/pwm-amlogic.yaml')
-rw-r--r-- | dts/Bindings/pwm/pwm-amlogic.yaml | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/dts/Bindings/pwm/pwm-amlogic.yaml b/dts/Bindings/pwm/pwm-amlogic.yaml new file mode 100644 index 0000000000..1d71d4f8f3 --- /dev/null +++ b/dts/Bindings/pwm/pwm-amlogic.yaml @@ -0,0 +1,163 @@ +# 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>; + }; |