On Fri, May 04, 2018 at 02:49:02PM +0200, Jan Luebbe wrote:
> This deserializer can be used with sensors that directly produce a
> 10-bit LVDS stream and converts it to a parallel bus.
>
> Controlling it via the optional GPIOs is mainly useful for avoiding
> conflicts when another parallel sensor is connected to the same data bus
> as the deserializer.
>
> Signed-off-by: Jan Luebbe <jlu@xxxxxxxxxxxxxx>
> ---
> .../bindings/media/ti,scan921226h.txt | 59 +++++++++++++++++++
> 1 file changed, 59 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/ti,scan921226h.txt
>
> diff --git a/Documentation/devicetree/bindings/media/ti,scan921226h.txt b/Documentation/devicetree/bindings/media/ti,scan921226h.txt
> new file mode 100644
> index 000000000000..4e475672d7bf
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/ti,scan921226h.txt
> @@ -0,0 +1,59 @@
> +TI SCAN921226H Video Deserializer
> +---------------------------------
> +
> +The SCAN921226H receives a LVDS serial data stream with embedded clock and
> +converts it to a 10-bit wide parallel data bus and recovers parallel clock.
> +Some CMOS sensors such as the ON Semiconductor MT9V024 produce a LVDS signal
> +compatible with this deserializer.
> +
> +Required properties:
> +- compatible : should be "ti,scan921226h"
> +- #address-cells: should be <1>
> +- #size-cells: should be <0>
> +- port@0: serial (LVDS) input
> +- port@1: parallel output
> +
> +The device node should contain two 'port' child nodes (one each for input and
> +output), in accordance with the video interface bindings defined in
> +Documentation/devicetree/bindings/media/video-interfaces.txt.
> +
> +Optional Properties:
> +- enable-gpios: reference to the GPIO connected to the REN (output enable) pin,
> + if any.
> +- npwrdn-gpios: reference to the GPIO connected to the nPWRDN pin, if any.
Use the standard powerdown-gpios here.
Both should state the active level.
> +
> +Optionally, #address-cells, #size-cells, and port nodes can be grouped under a
> +ports node as described in Documentation/devicetree/bindings/graph.txt.
> +
> +Example:
> +
> + csi0_deserializer: csi0_deserializer {
Don't use '_' in node names.
> + compatible = "ti,scan921226h";
> +
> + enable-gpios = <&gpio5 20 GPIO_ACTIVE_HIGH>;
> + npwrdn-gpios = <&gpio1 24 GPIO_ACTIVE_HIGH>;
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + /* serial sink interface */
> + port@0 {
> + reg = <0>;
> +
> + des0_in: endpoint {
> + remote-endpoint = <&mt9v024_0_out>;
> + };
> + };
> +
> + /* parallel source interface */
> + port@1 {
> + reg = <1>;
> +
> + des0_out: endpoint {
> + remote-endpoint = <&ipu1_csi0_mux_from_parallel_sensor>;
> + bus-width = <8>;
> + hsync-active = <1>;
> + vsync-active = <1>;
> + };
> + };
> + };
> --
> 2.17.0
>
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