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