On Mon, Oct 14, 2019 at 06:20:18PM +0800, Tzung-Bi Shih wrote:
> - Add "reg" for binding to shared memory exposed by EC.
> - Add "memory-region" for binding to memory region shared by AP.
>
> Signed-off-by: Tzung-Bi Shih <tzungbi@xxxxxxxxxx>
Acked-By: Benson Leung <bleung@xxxxxxxxxxxx>
> ---
> .../bindings/sound/google,cros-ec-codec.txt | 20 +++++++++++++++++++
> 1 file changed, 20 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt b/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt
> index 0ce9fafc78e2..8ca52dcc5572 100644
> --- a/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt
> +++ b/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt
> @@ -10,8 +10,26 @@ Required properties:
> - compatible: Must contain "google,cros-ec-codec"
> - #sound-dai-cells: Should be 1. The cell specifies number of DAIs.
>
> +Optional properties:
> +- reg: Pysical 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 length of the shared memory.
> +- memory-region: Shared memory region to EC. A "shared-dma-pool". See
> + ../reserved-memory/reserved-memory.txt for details.
> +
> Example:
>
> +{
> + ...
> +
> + reserved_mem: reserved_mem {
> + compatible = "shared-dma-pool";
> + reg = <0 0x52800000 0 0x100000>;
> + no-map;
> + };
> +}
> +
> cros-ec@0 {
> compatible = "google,cros-ec-spi";
>
> @@ -20,5 +38,7 @@ cros-ec@0 {
> cros_ec_codec: ec-codec {
> compatible = "google,cros-ec-codec";
> #sound-dai-cells = <1>;
> + reg = <0x0 0x10500000 0x80000>;
> + memory-region = <&reserved_mem>;
> };
> };
> --
> 2.23.0.700.g56cf767bdb-goog
>
--
Benson Leung
Staff Software Engineer
Chrome OS Kernel
Google Inc.
bleung@xxxxxxxxxx
Chromium OS Project
bleung@xxxxxxxxxxxx
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