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Date: Thu, 9 Mar 2017 20:52:41 -0800 From: Steve Longerbeam <slongerbeam@...il.com> To: robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org, kernel@...gutronix.de, fabio.estevam@....com, linux@...linux.org.uk, mchehab@...nel.org, hverkuil@...all.nl, nick@...anahar.org, markus.heiser@...marIT.de, p.zabel@...gutronix.de, laurent.pinchart+renesas@...asonboard.com, bparrot@...com, geert@...ux-m68k.org, arnd@...db.de, sudipm.mukherjee@...il.com, minghsiu.tsai@...iatek.com, tiffany.lin@...iatek.com, jean-christophe.trotin@...com, horms+renesas@...ge.net.au, niklas.soderlund+renesas@...natech.se, robert.jarzmik@...e.fr, songjun.wu@...rochip.com, andrew-ct.chen@...iatek.com, gregkh@...uxfoundation.org, shuah@...nel.org, sakari.ailus@...ux.intel.com, pavel@....cz Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org, devel@...verdev.osuosl.org, Sascha Hauer <s.hauer@...gutronix.de>, Steve Longerbeam <steve_longerbeam@...tor.com> Subject: [PATCH v5 01/39] [media] dt-bindings: Add bindings for video-multiplexer device From: Philipp Zabel <p.zabel@...gutronix.de> Add bindings documentation for the video multiplexer device. Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de> Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de> Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com> --- .../bindings/media/video-multiplexer.txt | 59 ++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/video-multiplexer.txt diff --git a/Documentation/devicetree/bindings/media/video-multiplexer.txt b/Documentation/devicetree/bindings/media/video-multiplexer.txt new file mode 100644 index 0000000..9d133d9 --- /dev/null +++ b/Documentation/devicetree/bindings/media/video-multiplexer.txt @@ -0,0 +1,59 @@ +Video Multiplexer +================= + +Video multiplexers allow to select between multiple input ports. Video received +on the active input port is passed through to the output port. Muxes described +by this binding may be controlled by a syscon register bitfield or by a GPIO. + +Required properties: +- compatible : should be "video-multiplexer" +- reg: should be register base of the register containing the control bitfield +- bit-mask: bitmask of the control bitfield in the control register +- bit-shift: bit offset of the control bitfield in the control register +- gpios: alternatively to reg, bit-mask, and bit-shift, a single GPIO phandle + may be given to switch between two inputs +- #address-cells: should be <1> +- #size-cells: should be <0> +- port@*: at least three port nodes containing endpoints connecting to the + source and sink devices according to of_graph bindings. The last port is + the output port, all others are inputs. + +Example: + +syscon { + compatible = "syscon", "simple-mfd"; + + mux { + compatible = "video-multiplexer"; + /* Single bit (1 << 19) in syscon register 0x04: */ + reg = <0x04>; + bit-mask = <1>; + bit-shift = <19>; + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + + mux_in0: endpoint { + remote-endpoint = <&video_source0_out>; + }; + }; + + port@1 { + reg = <1>; + + mux_in1: endpoint { + remote-endpoint = <&video_source1_out>; + }; + }; + + port@2 { + reg = <2>; + + mux_out: endpoint { + remote-endpoint = <&capture_interface_in>; + }; + }; + }; +}; -- 2.7.4
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