[media] Add Exynos5 FIMC-IS device tree bindings documentation

The patch adds the DT binding documentation for Samsung
Exynos5 SoC series imaging subsystem (FIMC-IS).

Change-Id: Iee71e3cce25f2983ee9cf74c5f8648b18af2a1d9
Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>

diff --git a/Documentation/devicetree/bindings/media/exynos5-fimc-is.txt b/Documentation/devicetree/bindings/media/exynos5-fimc-is.txt
new file mode 100644 (file)
index 0000000..658d4a9
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/exynos5-fimc-is.txt
@@ -0,0 +1,113 @@
+Samsung EXYNOS5 SoC series Imaging Subsystem (FIMC-IS)
+------------------------------------------------------
+
+The camera subsystem on Samsung Exynos5 SoC has some changes relative
+to previous SoC versions. Exynos5 has almost similar MIPI-CSIS and
+FIMC-LITE IPs but has a much improved version of FIMC-IS which can
+handle sensor controls and camera post-processing operations. The
+Exynos5 FIMC-IS has a dedicated ARM Cortex A5 processor, many
+post-processing blocks (ISP, DRC, FD, ODC, DIS, 3DNR) and two
+dedicated scalers (SCC and SCP).
+
+fimc-is node
+------------
+
+Required properties:
+
+- compatible        : should contain "samsung,exynos5250-fimc-is"
+- reg               : physical base address and size of the memory mapped
+                      registers
+- interrupts        : interrupt-specifier for the fimc-is interrupt
+- clocks            : list of clock specifiers, corresponding to entries in
+                      clock-names property
+- clock-names       : must contain "isp", "mcu_isp", "isp_div0", "isp_div1",
+                      "isp_divmpwm", "mcu_isp_div0", "mcu_isp_div1" entries,
+                      matching entries in the clocks property
+- samsung,pmu       : phandle to the Power Management Unit (PMU) node
+
+i2c-isp (ISP I2C bus controller) nodes
+--------------------------------------
+The i2c-isp nodes should be children of the fimc-is node.
+
+Required properties:
+
+- compatible   : must contain "samsung,exynos4212-i2c-isp" for Exynos4212,
+                 Exynos4412 and Exynos5250 SoCs
+- reg          : physical base address and length of the registers set
+- clocks       : should contain gate clock specifier for this controller
+- clock-names  : should contain "i2c_isp" for the gate clock
+- pinctrl-0    : phandle of the pinctrl node for the i2c isp
+- pinctrl-names : must contain "default"
+
+ranges, #address-cells, and #size-cells should be present as appropriate.
+
+Device tree nodes of the image sensors controlled directly by the FIMC-IS
+firmware must be child nodes of their corresponding ISP I2C bus controller node.
+The data link of these image sensors must be specified using the common video
+interfaces bindings, defined in video-interfaces.txt.
+
+Example:
+
+       fimc_is: fimc-is@13000000 {
+               compatible = "samsung,exynos5250-fimc-is";
+               #address-cells = <1>;
+               #size-cells = <1>;
+               ranges;
+               reg = <0x13000000 0x200000>;
+               interrupt-parent = <&combiner>;
+               interrupts = <19 1>;
+               clocks = <&clock 346>, <&clock 347>, <&clock 512>,
+                       <&clock 513>, <&clock 514>, <&clock 515>,
+                       <&clock 516>;
+               clock-names = "isp", "mcu_isp", "isp_div0", "isp_div1",
+                               "isp_divmpwm", "mcu_isp_div0",
+                               "mcu_isp_div1";
+               samsung,pmu = <&pmu>;
+
+               i2c0_isp: i2c-isp@13130000 {
+                       compatible = "samsung,exynos4212-i2c-isp";
+                       reg = <0x13130000 0x100>;
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       clocks = <&clock 352>;
+                       clock-names = "i2c_isp";
+                       pinctrl-0 = <&cam_i2c0_bus>;
+                       pinctrl-names = "default";
+               };
+
+               i2c1_isp: i2c-isp@13140000 {
+                       compatible = "samsung,exynos4212-i2c-isp";
+                       reg = <0x13140000 0x100>;
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       clocks = <&clock 353>;
+                       clock-names = "i2c_isp";
+                       pinctrl-0 = <&cam_i2c1_bus>;
+                       pinctrl-names = "default";
+               };
+       };
+
+In the board specific file the sensor nodes can be provided. For the sensor
+node documentation for s5k4e5, please refer to samsung-s5k4e5.txt
+
+       fimc-is@13000000 {
+               status = "okay";
+
+               i2c-isp@13130000 {
+                       s5k4e5@20 {
+                               compatible = "samsung,s5k4e5";
+                               reg = <0x20>;
+                               reset-gpios = <&gpx1 2 1>;
+                               clock-frequency = <24000000>;
+                               clocks = <&clock 129>;
+                               clock-names = "extclk";
+                               svdda-supply = <&vdd>;
+                               svddio-supply = <&vdd>;
+                               port {
+                                       is_s5k4e5_ep: endpoint {
+                                               remote-endpoint = <&csis0_ep>;
+                                       };
+                               };
+                       };
+               };
+       };