The Renesas R-Car Gen2 and Gen3 SoCs have internal LVDS encoders. Add
corresponding device tree bindings.

Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
Reviewed-by: Rob Herring <r...@kernel.org>
---
Changes since v1:

- Move the SoC name before the IP name in compatible strings
- Rename parallel input to parallel RGB input
- Fixed "renesas,r8a7743-lvds" description
- Document the resets property
- Fixed typo
---
 .../bindings/display/bridge/renesas,lvds.txt       | 56 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 57 insertions(+)
 create mode 100644 
Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt

diff --git a/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt 
b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
new file mode 100644
index 000000000000..2b19ce51ec07
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
@@ -0,0 +1,56 @@
+Renesas R-Car LVDS Encoder
+==========================
+
+These DT bindings describe the LVDS encoder embedded in the Renesas R-Car
+Gen2, R-Car Gen3 and RZ/G SoCs.
+
+Required properties:
+
+- compatible : Shall contain one of
+  - "renesas,r8a7743-lvds" for R8A7743 (RZ/G1M) compatible LVDS encoders
+  - "renesas,r8a7790-lvds" for R8A7790 (R-Car H2) compatible LVDS encoders
+  - "renesas,r8a7791-lvds" for R8A7791 (R-Car M2-W) compatible LVDS encoders
+  - "renesas,r8a7793-lvds" for R8A7791 (R-Car M2-N) compatible LVDS encoders
+  - "renesas,r8a7795-lvds" for R8A7795 (R-Car H3) compatible LVDS encoders
+  - "renesas,r8a7796-lvds" for R8A7796 (R-Car M3-W) compatible LVDS encoders
+
+- reg: Base address and length for the memory-mapped registers
+- clocks: A phandle + clock-specifier pair for the functional clock
+- resets: A phandle + reset specifier for the module reset
+
+Required nodes:
+
+The LVDS encoder has two video ports. Their connections are modelled using the
+OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.
+
+- Video port 0 corresponds to the parallel RGB input
+- Video port 1 corresponds to the LVDS output
+
+Each port shall have a single endpoint.
+
+
+Example:
+
+       lvds0: lvds@feb90000 {
+               compatible = "renesas,r8a7790-lvds";
+               reg = <0 0xfeb90000 0 0x1c>;
+               clocks = <&cpg CPG_MOD 726>;
+               resets = <&cpg 726>;
+
+               ports {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+
+                       port@0 {
+                               reg = <0>;
+                               lvds0_in: endpoint {
+                                       remote-endpoint = <&du_out_lvds0>;
+                               };
+                       };
+                       port@1 {
+                               reg = <1>;
+                               lvds0_out: endpoint {
+                               };
+                       };
+               };
+       };
diff --git a/MAINTAINERS b/MAINTAINERS
index 5bc088f27c83..5b0c14f4209b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4723,6 +4723,7 @@ F:        drivers/gpu/drm/rcar-du/
 F:     drivers/gpu/drm/shmobile/
 F:     include/linux/platform_data/shmob_drm.h
 F:     Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.txt
+F:     Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt
 F:     Documentation/devicetree/bindings/display/renesas,du.txt
 
 DRM DRIVERS FOR ROCKCHIP
-- 
Regards,

Laurent Pinchart

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