From b3284430615c27ca441967f99fbde957b434e092 Mon Sep 17 00:00:00 2001 From: Stephan Gerhold Date: Fri, 4 Mar 2022 11:24:51 +0100 Subject: [PATCH] ASoC: dt-bindings: Add schema for "awinic,aw8738" Add a DT schema for describing Awinic AW8738 audio amplifiers. They are fairly simple and controlled using a single GPIO. The number of pulses during power up selects one of a few pre-defined operation modes. This can be used to configure the speaker-guard function (primarily the power limit for the amplifier). Signed-off-by: Stephan Gerhold Link: https://lore.kernel.org/r/20220304102452.26856-2-stephan@gerhold.net Signed-off-by: Mark Brown --- .../devicetree/bindings/sound/awinic,aw8738.yaml | 54 ++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/awinic,aw8738.yaml diff --git a/Documentation/devicetree/bindings/sound/awinic,aw8738.yaml b/Documentation/devicetree/bindings/sound/awinic,aw8738.yaml new file mode 100644 index 0000000..dce86da --- /dev/null +++ b/Documentation/devicetree/bindings/sound/awinic,aw8738.yaml @@ -0,0 +1,54 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/sound/awinic,aw8738.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Awinic AW8738 Audio Amplifier + +maintainers: + - Stephan Gerhold + +description: + The Awinic AW8738 is a simple audio amplifier with different operation modes + (set using one-wire pulse control). The mode configures the speaker-guard + function (primarily the power limit for the amplifier). + +allOf: + - $ref: name-prefix.yaml# + +properties: + compatible: + const: awinic,aw8738 + + mode-gpios: + description: + GPIO used for one-wire pulse control. The pin is typically called SHDN + (active-low), but this is misleading since it is actually more than + just a simple shutdown/enable control. + maxItems: 1 + + awinic,mode: + description: Operation mode (number of pulses for one-wire pulse control) + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 1 + maximum: 7 + + sound-name-prefix: true + +required: + - compatible + - mode-gpios + - awinic,mode + +additionalProperties: false + +examples: + - | + #include + audio-amplifier { + compatible = "awinic,aw8738"; + mode-gpios = <&msmgpio 114 GPIO_ACTIVE_HIGH>; + awinic,mode = <5>; + sound-name-prefix = "Speaker Amp"; + }; -- 2.7.4