[media] media: soc_camera: pxa_camera documentation device-tree support

Add device-tree bindings documentation for pxa_camera driver.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/Documentation/devicetree/bindings/media/pxa-camera.txt b/Documentation/devicetree/bindings/media/pxa-camera.txt
new file mode 100644 (file)
index 0000000..11f5b5d
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+++ b/Documentation/devicetree/bindings/media/pxa-camera.txt
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+Marvell PXA camera host interface
+
+Required properties:
+ - compatible: Should be "marvell,pxa270-qci"
+ - reg: register base and size
+ - interrupts: the interrupt number
+ - any required generic properties defined in video-interfaces.txt
+
+Optional properties:
+ - clocks: input clock (see clock-bindings.txt)
+ - clock-output-names: should contain the name of the clock driving the
+                       sensor master clock MCLK
+ - clock-frequency: host interface is driving MCLK, and MCLK rate is this rate
+
+Example:
+
+       pxa_camera: pxa_camera@50000000 {
+               compatible = "marvell,pxa270-qci";
+               reg = <0x50000000 0x1000>;
+               interrupts = <33>;
+
+               clocks = <&pxa2xx_clks 24>;
+               clock-names = "ciclk";
+               clock-frequency = <50000000>;
+               clock-output-names = "qci_mclk";
+
+               status = "okay";
+
+               port {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+
+                       /* Parallel bus endpoint */
+                       qci: endpoint@0 {
+                               reg = <0>;              /* Local endpoint # */
+                               remote-endpoint = <&mt9m111_1>;
+                               bus-width = <8>;        /* Used data lines */
+                               hsync-active = <0>;     /* Active low */
+                               vsync-active = <0>;     /* Active low */
+                               pclk-sample = <1>;      /* Rising */
+                       };
+               };
+       };