From: Jacob Chen <redacted>

Add DT bindings documentation for Rockchip ISP1

Signed-off-by: Jacob Chen <redacted>
---
 .../devicetree/bindings/media/rockchip-isp1.txt    | 57 ++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/rockchip-isp1.txt

diff --git a/Documentation/devicetree/bindings/media/rockchip-isp1.txt b/Documentation/devicetree/bindings/media/rockchip-isp1.txt
new file mode 100644
index 000000000000..0971ed94ed69
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/rockchip-isp1.txt

@@ -0,0 +1,57 @@
+Rockchip SoC Image Signal Processing unit v1
+----------------------------------------------
+
+Rockchip ISP1 is the Camera interface for the Rockchip series of SoCs
+which contains image processing, scaling, and compression funcitons.
+
+Required properties:
+  - compatible: value should be one of the following
+      "rockchip,rk3288-cif-isp";
+      "rockchip,rk3399-cif-isp";
+  - reg : offset and length of the register set for the device.
+  - interrupts: should contain ISP interrupt.
+  - clocks: phandle to the required clocks.
+  - clock-names: required clock name.
+  - iommus: required a iommu node.
+
+The device node should contain one 'port' child node with child 'endpoint'
+nodes, according to the bindings defined in Documentation/devicetree/bindings/
+media/video-interfaces.txt.
+
+For sensor with a parallel video bus, it could be linked directly to the isp.
+For sensor with a MIPI CSI-2 video bus, it should be linked through the
+MIPI-DPHY, which is defined in rockchip-mipi-dphy.txt.