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# SPDX-License-Identifier: GPL-2.0-only
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/google,cros-ec-codec.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Audio codec controlled by ChromeOS EC
maintainers:
- Cheng-Yi Chiang <cychiang@chromium.org>
- Tzung-Bi Shih <tzungbi@google.com>
description: |
Google's ChromeOS EC codec is a digital mic codec provided by the
Embedded Controller (EC) and is controlled via a host-command
interface. An EC codec node should only be found inside the "codecs"
subnode of a cros-ec node.
(see Documentation/devicetree/bindings/mfd/google,cros-ec.yaml).
properties:
compatible:
const: google,cros-ec-codec
"#sound-dai-cells":
const: 1
reg:
items:
- description: |
Physical base address and length of shared memory region from EC.
It contains 3 unsigned 32-bit integer. The first 2 integers
combine to become an unsigned 64-bit physical address.
The last one integer is the length of the shared memory.
memory-region:
maxItems: 1
description: |
Shared memory region to EC. A "shared-dma-pool".
See ../reserved-memory/reserved-memory.txt for details.
required:
- compatible
- '#sound-dai-cells'
additionalProperties: false
examples:
- |
reserved_mem: reserved-mem@52800000 {
compatible = "shared-dma-pool";
reg = <0x52800000 0x100000>;
no-map;
};
spi {
#address-cells = <1>;
#size-cells = <0>;
cros-ec@0 {
compatible = "google,cros-ec-spi";
reg = <0>;
codecs {
#address-cells = <2>;
#size-cells = <1>;
cros_ec_codec: ec-codec@10500000 {
compatible = "google,cros-ec-codec";
#sound-dai-cells = <1>;
reg = <0x0 0x10500000 0x80000>;
memory-region = <&reserved_mem>;
};
};
};
};
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