| # SPDX-License-Identifier: GPL-2.0 | |
| %YAML 1.2 | |
| --- | |
| $id: http://devicetree.org/schemas/sound/dmic-codec.yaml# | |
| $schema: http://devicetree.org/meta-schemas/core.yaml# | |
| title: Generic PDM Digital microphone (DMIC) codec | |
| maintainers: | |
| - Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> | |
| allOf: | |
| - $ref: dai-common.yaml# | |
| properties: | |
| compatible: | |
| const: dmic-codec | |
| '#sound-dai-cells': | |
| const: 0 | |
| vref-supply: | |
| description: Phandle to the digital microphone reference supply | |
| dmicen-gpios: | |
| description: GPIO specifier for DMIC to control start and stop | |
| maxItems: 1 | |
| num-channels: | |
| description: Number of microphones on this DAI | |
| $ref: /schemas/types.yaml#/definitions/uint32 | |
| minimum: 1 | |
| maximum: 8 | |
| default: 8 | |
| modeswitch-delay-ms: | |
| description: Delay (in ms) to complete DMIC mode switch | |
| wakeup-delay-ms: | |
| description: Delay (in ms) after enabling the DMIC | |
| port: | |
| $ref: audio-graph-port.yaml# | |
| unevaluatedProperties: false | |
| required: | |
| - compatible | |
| unevaluatedProperties: false | |
| examples: | |
| - | | |
| #include <dt-bindings/gpio/gpio.h> | |
| dmic { | |
| compatible = "dmic-codec"; | |
| dmicen-gpios = <&gpio4 3 GPIO_ACTIVE_HIGH>; | |
| num-channels = <1>; | |
| wakeup-delay-ms = <50>; | |
| modeswitch-delay-ms = <35>; | |
| }; | |
| ... |