From 50f249f9de8c447c780325ca46199dc5d481ab9f Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 14 Feb 2020 09:26:23 +0100 Subject: [PATCH] dt-bindings: display: renesas: du: Document optional reset properties Document the optional properties for describing module resets, to support resetting display channels on R-Car Gen2 and Gen3. Signed-off-by: Geert Uytterhoeven Acked-by: Laurent Pinchart Acked-by: Rob Herring Reviewed-by: Kieran Bingham Signed-off-by: Laurent Pinchart --- .../devicetree/bindings/display/renesas,du.txt | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/devicetree/bindings/display/renesas,du.txt b/Documentation/devicetree/bindings/display/renesas,du.txt index eb4ae41fe41f8..51cd4d1627703 100644 --- a/Documentation/devicetree/bindings/display/renesas,du.txt +++ b/Documentation/devicetree/bindings/display/renesas,du.txt @@ -50,6 +50,14 @@ Required Properties: VSP instance that serves the DU channel, and the channel index identifies the LIF instance in that VSP. +Optional properties: + - resets: A list of phandle + reset-specifier pairs, one for each entry in + the reset-names property. + - reset-names: Names of the resets. This property is model-dependent. + - All but R8A7779 use one reset for a group of one or more successive + channels. The resets must be named "du.x" with "x" being the numerical + index of the lowest channel in the group. + Required nodes: The connections to the DU output video ports are modeled using the OF graph @@ -96,6 +104,8 @@ Example: R8A7795 (R-Car H3) ES2.0 DU <&cpg CPG_MOD 722>, <&cpg CPG_MOD 721>; clock-names = "du.0", "du.1", "du.2", "du.3"; + resets = <&cpg 724>, <&cpg 722>; + reset-names = "du.0", "du.2"; renesas,cmms = <&cmm0>, <&cmm1>, <&cmm2>, <&cmm3>; renesas,vsps = <&vspd0 0>, <&vspd1 0>, <&vspd2 0>, <&vspd0 1>; -- 2.39.5