[RFC PATCH 1/4] dt-bindings: sound: intel, keembay-i2s: Add info for device to use DMA

[Michael Sit Wei Hong <michael.wei.hong.sit@intel.com>]

Add descriptions for entries needed for audio device to use DMA
channels for audio playback and capture.

Signed-off-by: Michael Sit Wei Hong <michael.wei.hong.sit@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
 .../bindings/sound/intel,keembay-i2s.yaml          | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/intel,keembay-i2s.yaml b/Documentation/devicetree/bindings/sound/intel,keembay-i2s.yaml
index d346e61ab708..e0658f122cbb 100644
--- a/Documentation/devicetree/bindings/sound/intel,keembay-i2s.yaml
+++ b/Documentation/devicetree/bindings/sound/intel,keembay-i2s.yaml
@@ -45,6 +45,18 @@ properties:
       - const: osc
       - const: apb_clk
 
+  dmas:
+    items:
+      - description: DMA controller phandle and DMA channel
+                     for TX and RX
+
+  dma-names:
+    items:
+      - description: "tx" for the transmit channel
+                     "rx" for the receive channel
+      - const: tx
+      - const: rx
+
 required:
   - compatible
   - "#sound-dai-cells"
@@ -70,4 +82,6 @@ examples:
          interrupts = <GIC_SPI 120 IRQ_TYPE_LEVEL_HIGH>;
          clock-names = "osc", "apb_clk";
          clocks = <&scmi_clk KEEM_BAY_PSS_AUX_I2S3>, <&scmi_clk KEEM_BAY_PSS_I2S3>;
+         dmas = <&axi_dma0 29 &axi_dma0 33>;
+         dma-names = "tx", "rx";
      };
-- 
2.17.1