bindings/sound/google%2Ccros-ec-codec.yaml

1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/sound/google,cros-ec-codec.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Audio codec controlled by ChromeOS EC
10   - Cheng-Yi Chiang <cychiang@chromium.org>
11   - Tzung-Bi Shih <tzungbi@kernel.org>
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).
21   - $ref: dai-common.yaml#
25     const: google,cros-ec-codec
27   "#sound-dai-cells":
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.
38   memory-region:
41       Shared memory region to EC.  A "shared-dma-pool".
42       See ../reserved-memory/reserved-memory.txt for details.
45   - compatible
46   - '#sound-dai-cells'
51   - |
52     reserved_mem: reserved-mem@52800000 {
53         compatible = "shared-dma-pool";
55         no-map;
58         #address-cells = <1>;
59         #size-cells = <0>;
60         cros-ec@0 {
61             compatible = "google,cros-ec-spi";
66                 #address-cells = <2>;
67                 #size-cells = <1>;
69                 cros_ec_codec: ec-codec@10500000 {
70                     compatible = "google,cros-ec-codec";
71                     #sound-dai-cells = <1>;
73                     memory-region = <&reserved_mem>;