[PATCH v1 1/6] dt-bindings: display: rockchip: analogix-dp: Add support for RK3568

[Damon Ding <damon.ding@rock-chips.com>]

Document the "rockchip,rk3568-edp" compatible.  Like RK3576/RK3588,
the RK3568 eDP controller has the dp/pclk/hclk clocks and dp/apb
resets, but unlike them it does not use GRF registers, so make the
"rockchip,grf" property conditional on the SoC.

Also document the optional avdd-0v9 and avdd-1v8 supplies, which are
needed by the RK3568 eDP controller.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
---
 .../rockchip/rockchip,analogix-dp.yaml        | 25 ++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
index 39dafe75a680..f8670a4e0430 100644
--- a/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
+++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
@@ -15,6 +15,7 @@ properties:
     enum:
       - rockchip,rk3288-dp
       - rockchip,rk3399-edp
+      - rockchip,rk3568-edp
       - rockchip,rk3576-edp
       - rockchip,rk3588-edp
 
@@ -47,6 +48,16 @@ properties:
       - const: dp
       - const: apb
 
+  avdd-0v9-supply:
+    description:
+      A 0.9V supply that powers up the SoC internal circuitry. The actual
+      supply source varies between different boards.
+
+  avdd-1v8-supply:
+    description:
+      A 1.8V supply that powers up the SoC internal circuitry. The actual
+      supply source varies between different boards.
+
   rockchip,grf:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
@@ -61,11 +72,22 @@ required:
   - clock-names
   - resets
   - reset-names
-  - rockchip,grf
 
 allOf:
   - $ref: /schemas/display/bridge/analogix,dp.yaml#
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: rockchip,rk3568-edp
+    then:
+      properties:
+        rockchip,grf: false
+    else:
+      required:
+        - rockchip,grf
+
   - if:
       properties:
         compatible:
@@ -100,6 +122,7 @@ allOf:
         compatible:
           contains:
             enum:
+              - rockchip,rk3568-edp
               - rockchip,rk3576-edp
               - rockchip,rk3588-edp
     then:
-- 
2.34.1