On Fri, Dec 22, 2017 at 05:41:29PM +0800, Yong Deng wrote:
> Add binding documentation for Allwinner V3s CSI.
>
> Signed-off-by: Yong Deng <yong.deng@xxxxxxxxxxxx>
> ---
> .../devicetree/bindings/media/sun6i-csi.txt | 51 ++++++++++++++++++++++
> 1 file changed, 51 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/sun6i-csi.txt
>
> diff --git a/Documentation/devicetree/bindings/media/sun6i-csi.txt b/Documentation/devicetree/bindings/media/sun6i-csi.txt
> new file mode 100644
> index 0000000..b5bfe3f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/sun6i-csi.txt
> @@ -0,0 +1,51 @@
> +Allwinner V3s Camera Sensor Interface
> +------------------------------
> +
> +Required properties:
> + - compatible: value must be "allwinner,sun8i-v3s-csi"
> + - reg: base address and size of the memory-mapped region.
> + - interrupts: interrupt associated to this IP
> + - clocks: phandles to the clocks feeding the CSI
> + * bus: the CSI interface clock
> + * mod: the CSI module clock
> + * ram: the CSI DRAM clock
> + - clock-names: the clock names mentioned above
> + - resets: phandles to the reset line driving the CSI
> +
> +- ports: A ports node with endpoint definitions as defined in
> + Documentation/devicetree/bindings/media/video-interfaces.txt.
> + Currently, the driver only support the parallel interface. So, a single port
> + node with one endpoint and parallel bus is supported.
What the driver supports is not relevant. Please document what the h/w
has.
> +
> +Example:
> +
> + csi1: csi@1cb4000 {
> + compatible = "allwinner,sun8i-v3s-csi";
> + reg = <0x01cb4000 0x1000>;
> + interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&ccu CLK_BUS_CSI>,
> + <&ccu CLK_CSI1_SCLK>,
> + <&ccu CLK_DRAM_CSI>;
> + clock-names = "bus", "mod", "ram";
> + resets = <&ccu RST_BUS_CSI>;
> +
> + port {
> + #address-cells = <1>;
> + #size-cells = <0>;
These are not needed with a single endpoint.
> +
> + /* Parallel bus endpoint */
> + csi1_ep: endpoint {
> + remote-endpoint = <&adv7611_ep>;
> + bus-width = <16>;
> + data-shift = <0>;
> +
> + /* If hsync-active/vsync-active are missing,
> + embedded BT.656 sync is used */
> + hsync-active = <0>; /* Active low */
> + vsync-active = <0>; /* Active low */
> + data-active = <1>; /* Active high */
> + pclk-sample = <1>; /* Rising */
> + };
> + };
> + };
> +
> --
> 1.8.3.1
>
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