[PATCH 3/5] dt-bindings: sun4i-drm: add compatible for R40 HDMI PHY

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The Allwinner R40 HDMI PHY is currently the only one that seems to be
able to select between two PLL inputs.

Add a compatible string for it, and the pll-1 clock input definition.

Signed-off-by: Icenowy Zheng <icenowy@xxxxxxx>
---
 Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
index 62034039cee1..a750ff0f068d 100644
--- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
+++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
@@ -103,6 +103,7 @@ Required properties:
   - compatible: value must be one of:
     * allwinner,sun8i-a83t-hdmi-phy
     * allwinner,sun8i-h3-hdmi-phy
+    * allwinner,sun8i-r40-hdmi-phy
     * allwinner,sun50i-a64-hdmi-phy
   - reg: base address and size of memory-mapped region
   - clocks: phandles to the clocks feeding the HDMI PHY
@@ -112,8 +113,9 @@ Required properties:
   - resets: phandle to the reset controller driving the PHY
   - reset-names: must be "phy"
 
-H3 and A64 HDMI PHY require additional clocks:
+H3, A64 and R40 HDMI PHY require additional clocks:
   - pll-0: parent of phy clock
+  - pll-1: second possible phy clock parent (R40 only)
 
 TV Encoder
 ----------
-- 
2.18.0

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