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-rw-r--r--Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt24
1 files changed, 21 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt b/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt
index 1084f7f22eea..8ca52dcc5572 100644
--- a/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt
+++ b/Documentation/devicetree/bindings/sound/google,cros-ec-codec.txt
@@ -1,4 +1,4 @@
-* Audio codec controlled by ChromeOS EC
+Audio codec controlled by ChromeOS EC
Google's ChromeOS EC codec is a digital mic codec provided by the
Embedded Controller (EC) and is controlled via a host-command interface.
@@ -9,10 +9,27 @@ Documentation/devicetree/bindings/mfd/cros-ec.txt).
Required properties:
- compatible: Must contain "google,cros-ec-codec"
- #sound-dai-cells: Should be 1. The cell specifies number of DAIs.
-- max-dmic-gain: A number for maximum gain in dB on digital microphone.
+
+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";
@@ -21,6 +38,7 @@ cros-ec@0 {
cros_ec_codec: ec-codec {
compatible = "google,cros-ec-codec";
#sound-dai-cells = <1>;
- max-dmic-gain = <43>;
+ reg = <0x0 0x10500000 0x80000>;
+ memory-region = <&reserved_mem>;
};
};