dt-bindings: sound: add compatible for rk1808

This patch adds bindings for rk1808 soc.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt
index 3e0eb7354ba6e89dedd3ae3205423a78301e3c75..98572a25122f050376ebd1e530b635fb6a07e08a 100644 (file)
--- 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.