Document the optional properties for describing module resets, to
support resetting display channels on R-Car Gen2 and Gen3.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
---
v4:
- Use "All but R8A7779" instead of "R8A779[0123456]", to reduce future
churn,
v3:
- Add Acked-by,
- Drop LVDS resets, as LVDS is now covered by a separate binding,
- Update the example.
v2:
- s/phandles/phandle/.
---
.../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 c97dfacad28118fa..59be7462a4c8bb8e 100644
--- a/Documentation/devicetree/bindings/display/renesas,du.txt
+++ b/Documentation/devicetree/bindings/display/renesas,du.txt
@@ -45,6 +45,14 @@ Required Properties:
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
@@ -90,6 +98,8 @@ 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";
vsps = <&vspd0 0>, <&vspd1 0>, <&vspd2 0>, <&vspd0 1>;
ports {
--
2.17.1
