[media] rcar_vin: add devicetree support

Add support for devicetree probe for the rcar-vin
driver.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
[g.liakhovetski@gmx.de fix a typo, sort headers alphabetically]
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>

Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 86 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/media/rcar_vin.txt b/Documentation/devicetree/bindings/media/rcar_vin.txt
new file mode 100644
index 000000000000..ba61782c2af9
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/rcar_vin.txt
@@ -0,0 +1,86 @@
+Renesas RCar Video Input driver (rcar_vin)
+------------------------------------------
+
+The rcar_vin device provides video input capabilities for the Renesas R-Car
+family of devices. The current blocks are always slaves and suppot one input
+channel which can be either RGB, YUYV or BT656.
+
+ - compatible: Must be one of the following
+   - "renesas,vin-r8a7791" for the R8A7791 device
+   - "renesas,vin-r8a7790" for the R8A7790 device
+   - "renesas,vin-r8a7779" for the R8A7779 device
+   - "renesas,vin-r8a7778" for the R8A7778 device
+ - reg: the register base and size for the device registers
+ - interrupts: the interrupt for the device
+ - clocks: Reference to the parent clock
+
+Additionally, an alias named vinX will need to be created to specify
+which video input device this is.
+
+The per-board settings:
+ - port sub-node describing a single endpoint connected to the vin
+   as described in video-interfaces.txt[1]. Only the first one will
+   be considered as each vin interface has one input port.
+
+   These settings are used to work out video input format and widths
+   into the system.
+
+
+Device node example
+-------------------
+
+        aliases {
+               vin0 = &vin0;
+        };
+
+        vin0: vin@0xe6ef0000 {
+                compatible = "renesas,vin-r8a7790";
+                clocks = <&mstp8_clks R8A7790_CLK_VIN0>;
+                reg = <0 0xe6ef0000 0 0x1000>;
+                interrupts = <0 188 IRQ_TYPE_LEVEL_HIGH>;
+                status = "disabled";
+        };
+
+Board setup example (vin1 composite video input)
+------------------------------------------------
+
+&i2c2   {
+        status = "ok";
+        pinctrl-0 = <&i2c2_pins>;
+        pinctrl-names = "default";
+
+        adv7180@20 {
+                compatible = "adi,adv7180";
+                reg = <0x20>;
+                remote = <&vin1>;
+
+                port {
+                        adv7180: endpoint {
+                                bus-width = <8>;
+                                remote-endpoint = <&vin1ep0>;
+                        };
+                };
+        };
+};
+
+/* composite video input */
+&vin1 {
+        pinctrl-0 = <&vin1_pins>;
+        pinctrl-names = "default";
+
+        status = "ok";
+
+        port {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                vin1ep0: endpoint {
+                        remote-endpoint = <&adv7180>;
+                        bus-width = <8>;
+                };
+        };
+};
+
+
+
+[1] video-interfaces.txt common video media interface