On 01/12/2018 03:04 PM, Jacopo Mondi wrote:
> Add bindings documentation for Renesas Capture Engine Unit (CEU).
>
> Signed-off-by: Jacopo Mondi <jacopo+rene...@jmondi.org>
> Reviewed-by: Rob Herring <r...@kernel.org>
> Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verk...@cisco.com>
Regards,
Hans
> ---
> .../devicetree/bindings/media/renesas,ceu.txt | 81
> ++++++++++++++++++++++
> 1 file changed, 81 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/renesas,ceu.txt
>
> diff --git a/Documentation/devicetree/bindings/media/renesas,ceu.txt
> b/Documentation/devicetree/bindings/media/renesas,ceu.txt
> new file mode 100644
> index 0000000..590ee27
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/renesas,ceu.txt
> @@ -0,0 +1,81 @@
> +Renesas Capture Engine Unit (CEU)
> +----------------------------------------------
> +
> +The Capture Engine Unit is the image capture interface found in the Renesas
> +SH Mobile and RZ SoCs.
> +
> +The interface supports a single parallel input with data bus width of 8 or 16
> +bits.
> +
> +Required properties:
> +- compatible: Shall be "renesas,r7s72100-ceu" for CEU units found in RZ/A1-H
> + and RZ/A1-M SoCs.
> +- reg: Registers address base and size.
> +- interrupts: The interrupt specifier.
> +
> +The CEU supports a single parallel input and should contain a single 'port'
> +subnode with a single 'endpoint'. Connection to input devices are modeled
> +according to the video interfaces OF bindings specified in:
> +Documentation/devicetree/bindings/media/video-interfaces.txt
> +
> +Optional endpoint properties applicable to parallel input bus described in
> +the above mentioned "video-interfaces.txt" file are supported.
> +
> +- hsync-active: Active state of the HSYNC signal, 0/1 for LOW/HIGH
> respectively.
> + If property is not present, default is active high.
> +- vsync-active: Active state of the VSYNC signal, 0/1 for LOW/HIGH
> respectively.
> + If property is not present, default is active high.
> +
> +Example:
> +
> +The example describes the connection between the Capture Engine Unit and an
> +OV7670 image sensor connected to i2c1 interface.
> +
> +ceu: ceu@e8210000 {
> + reg = <0xe8210000 0x209c>;
> + compatible = "renesas,r7s72100-ceu";
> + interrupts = <GIC_SPI 332 IRQ_TYPE_LEVEL_HIGH>;
> +
> + pinctrl-names = "default";
> + pinctrl-0 = <&vio_pins>;
> +
> + status = "okay";
> +
> + port {
> + ceu_in: endpoint {
> + remote-endpoint = <&ov7670_out>;
> +
> + hsync-active = <1>;
> + vsync-active = <0>;
> + };
> + };
> +};
> +
> +i2c1: i2c@fcfee400 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2c1_pins>;
> +
> + status = "okay";
> +
> + clock-frequency = <100000>;
> +
> + ov7670: camera@21 {
> + compatible = "ovti,ov7670";
> + reg = <0x21>;
> +
> + pinctrl-names = "default";
> + pinctrl-0 = <&vio_pins>;
> +
> + reset-gpios = <&port3 11 GPIO_ACTIVE_LOW>;
> + powerdown-gpios = <&port3 12 GPIO_ACTIVE_HIGH>;
> +
> + port {
> + ov7670_out: endpoint {
> + remote-endpoint = <&ceu_in>;
> +
> + hsync-active = <1>;
> + vsync-active = <0>;
> + };
> + };
> + };
> +};
>
