From: Jacob Chen <jacob2.c...@rock-chips.com>

Add DT bindings documentation for Rockchip ISP1

Signed-off-by: Jacob Chen <jacob2.c...@rock-chips.com>
Reviewed-by: Rob Herring <r...@kernel.org>
---
 .../devicetree/bindings/media/rockchip-isp1.txt    | 69 ++++++++++++++++++++++
 1 file changed, 69 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..4631a4b7c88a
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/rockchip-isp1.txt
@@ -0,0 +1,69 @@
+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.
+
+port 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.
+
+- endpoint(parallel):
+       - remote-endpoint: Connecting to a sensor with a parallel video bus.
+       - parallel_bus properties: Refer to Documentation/devicetree/bindings/
+               media/video-interfaces.txt.
+- endpoint(mipi):
+       - remote-endpoint: Connecting to Rockchip MIPI-DPHY,
+               which is defined in rockchip-mipi-dphy.txt.
+
+The port node must contain at least one endpoint, either parallel or mipi.
+It could have multiple endpoints, but please note the hardware don't support
+two sensors work at a time, they are supposed to work asynchronously.
+
+Device node example
+-------------------
+
+       isp0: isp0@ff910000 {
+               compatible = "rockchip,rk3399-cif-isp";
+               reg = <0x0 0xff910000 0x0 0x4000>;
+               interrupts = <GIC_SPI 43 IRQ_TYPE_LEVEL_HIGH 0>;
+               clocks = <&cru SCLK_ISP0>,
+                        <&cru ACLK_ISP0>, <&cru ACLK_ISP0_WRAPPER>,
+                        <&cru HCLK_ISP0>, <&cru HCLK_ISP0_WRAPPER>;
+               clock-names = "clk_isp",
+                             "aclk_isp", "aclk_isp_wrap",
+                             "hclk_isp", "hclk_isp_wrap";
+               power-domains = <&power RK3399_PD_ISP0>;
+               iommus = <&isp0_mmu>;
+
+               port {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+
+                       /* mipi */
+                       isp0_mipi_in: endpoint@0 {
+                               reg = <0>;
+                               remote-endpoint = <&dphy_rx0_out>;
+                       };
+
+                       /* parallel */
+                       isp0_parallel_in: endpoint@1 {
+                               reg = <1>;
+                               remote-endpoint = <&ov5640_out>;
+                               bus-width = <8>;
+                       };
+               };
+       };
-- 
2.16.1

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