- Add "ec-shm" 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>
---
.../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..cb46bc082b4b 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:
+- ec-shm: Shared memory region from EC. It contains 3 unsigned 32-bit
+ integer. The first 2 integers combine to become an unsigned
+ 64-bit 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>;
+ ec-shm = <0x0 0x10500000 0x80000>;
+ memory-region = <&reserved_mem>;
};
};
--
2.23.0.581.g78d2f28ef7-goog
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