linux-kernel - [PATCH v2] dt-bindings: display: bridge: renesas,dw-hdmi: Add resets property

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Date:   Wed, 31 Aug 2022 22:35:36 +0100
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Robert Foss <robert.foss@...aro.org>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v2] dt-bindings: display: bridge: renesas,dw-hdmi: Add resets property

The DWC HDMI blocks on R-Car and RZ/G2 SoC's use resets, so to complete
the bindings include resets property.

This also fixes the below warning when running dtbs_check:
arch/arm64/boot/dts/renesas/r8a774b1-hihope-rzg2n-rev2-ex-idk-1110wr.dtb: hdmi@...d0000: Unevaluated properties are not allowed ('resets' was unexpected)
	From schema: Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.yaml

While at it mark resets property as required as all the DT sources
in the kernel specify resets and update the example node.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
---
v1->v2
* Updated commit message
* Marked resets as required property
* Updated the example node
* Included RB tag from Laurent

v1: https://lore.kernel.org/lkml/20220829215816.6206-1-prabhakar.mahadev-lad.rj@bp.renesas.com/
---
 .../devicetree/bindings/display/bridge/renesas,dw-hdmi.yaml  | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.yaml b/Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.yaml
index 0c9785c8db51..e3ec697f89e7 100644
--- a/Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.yaml
@@ -38,6 +38,9 @@ properties:
   clock-names:
     maxItems: 2
 
+  resets:
+    maxItems: 1
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
 
@@ -67,6 +70,7 @@ required:
   - reg
   - clocks
   - clock-names
+  - resets
   - interrupts
   - ports
 
@@ -85,6 +89,7 @@ examples:
         clocks = <&cpg CPG_CORE R8A7795_CLK_S0D4>, <&cpg CPG_MOD 729>;
         clock-names = "iahb", "isfr";
         power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+        resets = <&cpg 729>;
 
         ports {
             #address-cells = <1>;
-- 
2.25.1