[PATCH] dt-bindings: sound: add compatible for rk1808

[Sugar Zhang]

This patch adds bindings for rk1808 soc.

Signed-off-by: Sugar Zhang <sugar.zhang@xxxxxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/sound/rockchip,pdm.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
index 3e0eb7354ba6..98572a25122f 100644
--- a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
+++ b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
@@ -4,6 +4,7 @@ Required properties:
 
 - compatible: "rockchip,pdm"
   - "rockchip,px30-pdm"
+  - "rockchip,rk1808-pdm"
   - "rockchip,rk3308-pdm"
 - reg: physical base address of the controller and length of memory mapped
   region.
-- 
2.20.1