From mboxrd@z Thu Jan 1 00:00:00 1970 From: slongerbeam@gmail.com (Steve Longerbeam) Date: Mon, 27 Mar 2017 17:40:18 -0700 Subject: [PATCH v6 01/39] [media] dt-bindings: Add bindings for video-multiplexer device In-Reply-To: <1490661656-10318-1-git-send-email-steve_longerbeam@mentor.com> References: <1490661656-10318-1-git-send-email-steve_longerbeam@mentor.com> Message-ID: <1490661656-10318-2-git-send-email-steve_longerbeam@mentor.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Philipp Zabel Add bindings documentation for the video multiplexer device. Signed-off-by: Sascha Hauer Signed-off-by: Philipp Zabel Signed-off-by: Steve Longerbeam --- .../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 at 0 { + reg = <0>; + + mux_in0: endpoint { + remote-endpoint = <&video_source0_out>; + }; + }; + + port at 1 { + reg = <1>; + + mux_in1: endpoint { + remote-endpoint = <&video_source1_out>; + }; + }; + + port at 2 { + reg = <2>; + + mux_out: endpoint { + remote-endpoint = <&capture_interface_in>; + }; + }; + }; +}; -- 2.7.4