45 lines
1.2 KiB
Plaintext
45 lines
1.2 KiB
Plaintext
Audio codec controlled by ChromeOS EC
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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 interface.
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An EC codec node should only be found as a sub-node of the EC node (see
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Documentation/devicetree/bindings/mfd/cros-ec.txt).
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Required properties:
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- compatible: Must contain "google,cros-ec-codec"
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- #sound-dai-cells: Should be 1. The cell specifies number of DAIs.
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Optional properties:
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- reg: Pysical 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. The last
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one integer is length of the shared memory.
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- memory-region: Shared memory region to EC. A "shared-dma-pool". See
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../reserved-memory/reserved-memory.txt for details.
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Example:
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{
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...
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reserved_mem: reserved_mem {
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compatible = "shared-dma-pool";
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reg = <0 0x52800000 0 0x100000>;
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no-map;
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};
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}
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cros-ec@0 {
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compatible = "google,cros-ec-spi";
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...
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cros_ec_codec: ec-codec {
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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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