Hi Jacopo,
CC devicetree folks
On Wed, Nov 15, 2017 at 11:55 AM, Jacopo Mondi
<jacopo+renesas@xxxxxxxxxx> wrote:
> Add bindings documentation for Renesas Capture Engine Unit (CEU).
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
> ---
> .../devicetree/bindings/media/renesas,ceu.txt | 87 ++++++++++++++++++++++
> 1 file changed, 87 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..a88e9cb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/renesas,ceu.txt
> @@ -0,0 +1,87 @@
> +Renesas Capture Engine Unit (CEU)
> +----------------------------------------------
> +
> +The Capture Engine Unit is the image capture interface found on Renesas
> +RZ chip series and on SH Mobile ones.
> +
> +The interface supports a single parallel input with up 8/16bits data bus width.
... with data bus widths up to 8/16 bits?
> +
> +Required properties:
> +- compatible
> + Must be "renesas,renesas-ceu".
The double "renesas" part looks odd to me. What about "renesas,ceu"?
Shouldn't you add SoC-specific compatible values like "renesas,r7s72100-ceu",
too?
> +- reg
> + Physical address base and size.
> +- interrupts
> + The interrupt line number.
interrupt specifier
> +- pinctrl-names, pinctrl-0
> + phandle of pin controller sub-node configuring pins for CEU operations.
> +
> +CEU supports a single parallel input and should contain a single 'port' subnode
> +with a single 'endpoint'. Optional endpoint properties applicable to parallel
> +input bus are described in "video-interfaces.txt".
> +
> +Example:
> +
> +The example describes the connection between the Capture Engine Unit and a
... an
> +OV7670 image sensor sitting on bus i2c1 with an on-board 24Mhz clock.
> +
> +ceu: ceu@e8210000 {
> + reg = <0xe8210000 0x209c>;
> + compatible = "renesas,renesas-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>;
> +
> + bus-width = <8>;
> + hsync-active = <1>;
> + vsync-active = <1>;
> + pclk-sample = <1>;
> + data-active = <1>;
> + };
> + };
> +};
> +
> +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>;
> +
> + clocks = <&xclk>;
> + clock-names = "xclk";
> +
> + xclk: fixed_clk {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <24000000>;
> + };
> +
> + port {
> + ov7670_out: endpoint {
> + remote-endpoint = <&ceu_in>;
> +
> + bus-width = <8>;
> + hsync-active = <1>;
> + vsync-active = <1>;
> + pclk-sample = <1>;
> + data-active = <1>;
> + };
> + };
> + };
> --
> 2.7.4
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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