Add documentation for Spreadtrum DMA platform driver.
Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxx>
---
.../devicetree/bindings/sound/sprd-pcm.txt | 23 ++++++++++++++++++++
1 file changed, 23 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/sprd-pcm.txt
diff --git a/Documentation/devicetree/bindings/sound/sprd-pcm.txt b/Documentation/devicetree/bindings/sound/sprd-pcm.txt
new file mode 100644
index 0000000..4b23e84
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/sprd-pcm.txt
@@ -0,0 +1,23 @@
+* Spreadtrum DMA platfrom bindings
+
+Required properties:
+- compatible: Should be "sprd,pcm-platform".
+- dmas: Specify the list of DMA controller phandle and DMA request line ordered pairs.
+- dma-names: Identifier string for each DMA request line in the dmas property.
+ These strings correspond 1:1 with the ordered pairs in dmas.
+
+Example:
+
+ audio_platform:platform@0 {
+ compatible = "sprd,pcm-platform";
+ dmas = <&agcp_dma 1 1>, <&agcp_dma 2 2>,
+ <&agcp_dma 3 3>, <&agcp_dma 4 4>,
+ <&agcp_dma 5 5>, <&agcp_dma 6 6>,
+ <&agcp_dma 7 7>, <&agcp_dma 8 8>,
+ <&agcp_dma 9 9>, <&agcp_dma 10 10>;
+ dma-names = "normal_p_l", "normal_p_r",
+ "normal_c_l", "normal_c_r",
+ "voice_c", "fast_p",
+ "loop_c", "loop_p",
+ "voip_c", "voip_p";
+ };
--
1.7.9.5
