| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0-only |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/sound/google,cros-ec-codec.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Audio codec controlled by ChromeOS EC |
| 8 | |
| 9 | maintainers: |
| 10 | - Cheng-Yi Chiang <cychiang@chromium.org> |
| 11 | - Tzung-Bi Shih <tzungbi@kernel.org> |
| 12 | |
| 13 | description: | |
| 14 | Google's ChromeOS EC codec is a digital mic codec provided by the |
| 15 | Embedded Controller (EC) and is controlled via a host-command |
| 16 | interface. An EC codec node should only be found inside the "codecs" |
| 17 | subnode of a cros-ec node. |
| 18 | (see Documentation/devicetree/bindings/mfd/google,cros-ec.yaml). |
| 19 | |
| 20 | allOf: |
| 21 | - $ref: dai-common.yaml# |
| 22 | |
| 23 | properties: |
| 24 | compatible: |
| 25 | const: google,cros-ec-codec |
| 26 | |
| 27 | "#sound-dai-cells": |
| 28 | const: 1 |
| 29 | |
| 30 | reg: |
| 31 | items: |
| 32 | - description: | |
| 33 | Physical base address and length of shared memory region from EC. |
| 34 | It contains 3 unsigned 32-bit integer. The first 2 integers |
| 35 | combine to become an unsigned 64-bit physical address. |
| 36 | The last one integer is the length of the shared memory. |
| 37 | |
| 38 | memory-region: |
| 39 | maxItems: 1 |
| 40 | description: | |
| 41 | Shared memory region to EC. A "shared-dma-pool". |
| 42 | See ../reserved-memory/reserved-memory.txt for details. |
| 43 | |
| 44 | required: |
| 45 | - compatible |
| 46 | - '#sound-dai-cells' |
| 47 | |
| 48 | unevaluatedProperties: false |
| 49 | |
| 50 | examples: |
| 51 | - | |
| 52 | reserved_mem: reserved-mem@52800000 { |
| 53 | compatible = "shared-dma-pool"; |
| 54 | reg = <0x52800000 0x100000>; |
| 55 | no-map; |
| 56 | }; |
| 57 | spi { |
| 58 | #address-cells = <1>; |
| 59 | #size-cells = <0>; |
| 60 | cros-ec@0 { |
| 61 | compatible = "google,cros-ec-spi"; |
| 62 | reg = <0>; |
| 63 | interrupts = <93 0>; |
| 64 | |
| 65 | codecs { |
| 66 | #address-cells = <2>; |
| 67 | #size-cells = <1>; |
| 68 | |
| 69 | cros_ec_codec: ec-codec@10500000 { |
| 70 | compatible = "google,cros-ec-codec"; |
| 71 | #sound-dai-cells = <1>; |
| 72 | reg = <0x0 0x10500000 0x80000>; |
| 73 | memory-region = <&reserved_mem>; |
| 74 | }; |
| 75 | |
| 76 | }; |
| 77 | }; |
| 78 | }; |