On Sat, Oct 05, 2019 at 04:55:05PM +0800, Tzung-Bi Shih wrote:
- 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@google.com
.../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 unsigned64-bit address. The last one integer is length of the sharedmemory.
This is an address accessible to the main CPU? If so, then it really should be using 'reg' and be translatable.
+- 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