| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 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 | |
| 7 | title: Generic PDM Digital microphone (DMIC) codec |
| 8 | |
| 9 | maintainers: |
| 10 | - Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> |
| 11 | |
| 12 | allOf: |
| 13 | - $ref: dai-common.yaml# |
| 14 | |
| 15 | properties: |
| 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 | |
| 39 | required: |
| 40 | - compatible |
| 41 | |
| 42 | unevaluatedProperties: false |
| 43 | |
| 44 | examples: |
| 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 | ... |