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@google.com
Acked-By: Benson Leung bleung@chromium.org
.../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 integerscombine to become an unsigned 64-bit physical address. The lastone 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