[PATCH] dt-bindings: display: rockchip: dw-hdmi: Allow resets for Rockchip HDMI

[Fabio Estevam]

The Rockchip DW HDMI binding sets unevaluatedProperties: false while
also inheriting from synopsys,dw-hdmi.yaml via allOf.

The Synopsys binding defines the optional properties resets and
reset-names, but due to dt-schema rules these are not considered
allowed once unevaluatedProperties: false is set in the Rockchip
schema unless they are re-declared locally.

This went unnoticed because most Rockchip SoCs do not wire a reset line
to the HDMI controller in their DTS. The rk3228, however, does use a
reset, which causes dtbs_check to emit:

Unevaluated properties are not allowed ('resets', 'reset-names')

Re-declare these properties in the Rockchip schema so they are accepted
when present, matching the capabilities of the underlying Synopsys IP
and fixing the dtbs_check warning for rk3228.

Signed-off-by: Fabio Estevam <festevam@xxxxxxxxx>
---
 .../bindings/display/rockchip/rockchip,dw-hdmi.yaml         | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
index 29716764413a..59fb084bb4fb 100644
--- a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
+++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
@@ -113,6 +113,12 @@ properties:
       - port@0
       - port@1
 
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: hdmi
+
   rockchip,grf:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
-- 
2.43.0