1# SPDX-License-Identifier: GPL-2.0 2%YAML 1.2 3--- 4$id: http://devicetree.org/schemas/sound/dmic-codec.yaml# 5$schema: http://devicetree.org/meta-schemas/core.yaml# 6 7title: Generic PDM Digital microphone (DMIC) codec 8 9maintainers: 10 - Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> 11 12allOf: 13 - $ref: dai-common.yaml# 14 15properties: 16 compatible: 17 const: dmic-codec 18 19 '#sound-dai-cells': 20 const: 0 21 22 dmicen-gpios: 23 description: GPIO specifier for DMIC to control start and stop 24 maxItems: 1 25 26 num-channels: 27 description: Number of microphones on this DAI 28 $ref: /schemas/types.yaml#/definitions/uint32 29 minimum: 1 30 maximum: 8 31 default: 8 32 33 modeswitch-delay-ms: 34 description: Delay (in ms) to complete DMIC mode switch 35 36 wakeup-delay-ms: 37 description: Delay (in ms) after enabling the DMIC 38 39required: 40 - compatible 41 42unevaluatedProperties: false 43 44examples: 45 - | 46 #include <dt-bindings/gpio/gpio.h> 47 48 dmic { 49 compatible = "dmic-codec"; 50 dmicen-gpios = <&gpio4 3 GPIO_ACTIVE_HIGH>; 51 num-channels = <1>; 52 wakeup-delay-ms = <50>; 53 modeswitch-delay-ms = <35>; 54 }; 55... 56