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4e12ad40b7
Add bindings documentation for the video multiplexer device. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
61 lines
1.4 KiB
Plaintext
61 lines
1.4 KiB
Plaintext
Video Multiplexer
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=================
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Video multiplexers allow to select between multiple input ports. Video received
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on the active input port is passed through to the output port. Muxes described
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by this binding are controlled by a multiplexer controller that is described by
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the bindings in Documentation/devicetree/bindings/mux/mux-controller.txt
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Required properties:
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- compatible : should be "video-mux"
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- mux-controls : mux controller node to use for operating the mux
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- #address-cells: should be <1>
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- #size-cells: should be <0>
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- port@*: at least three port nodes containing endpoints connecting to the
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source and sink devices according to of_graph bindings. The last port is
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the output port, all others are inputs.
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Optionally, #address-cells, #size-cells, and port nodes can be grouped under a
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ports node as described in Documentation/devicetree/bindings/graph.txt.
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Example:
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mux: mux-controller {
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compatible = "gpio-mux";
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#mux-control-cells = <0>;
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mux-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
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};
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video-mux {
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compatible = "video-mux";
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mux-controls = <&mux>;
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#address-cells = <1>;
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#size-cells = <0>;
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port@0 {
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reg = <0>;
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mux_in0: endpoint {
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remote-endpoint = <&video_source0_out>;
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};
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};
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port@1 {
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reg = <1>;
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mux_in1: endpoint {
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remote-endpoint = <&video_source1_out>;
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};
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};
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port@2 {
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reg = <2>;
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mux_out: endpoint {
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remote-endpoint = <&capture_interface_in>;
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};
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};
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};
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};
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