Hi Dave,
Am 14.06.2017 um 17:15 schrieb Dave Stevenson:
> Document the DT bindings for the CSI2/CCP2 receiver peripheral
> (known as Unicam) on BCM283x SoCs.
>
> Signed-off-by: Dave Stevenson <dave.steven...@raspberrypi.org>
please add the devicetree guys in CC for the binding.
> ---
> .../devicetree/bindings/media/bcm2835-unicam.txt | 76
> ++++++++++++++++++++++
> 1 file changed, 76 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/media/bcm2835-unicam.txt
>
> diff --git a/Documentation/devicetree/bindings/media/bcm2835-unicam.txt
> b/Documentation/devicetree/bindings/media/bcm2835-unicam.txt
> new file mode 100644
> index 0000000..cc5a451
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/bcm2835-unicam.txt
> @@ -0,0 +1,76 @@
> +Broadcom BCM283x Camera Interface (Unicam)
> +------------------------------------------
> +
> +The Unicam block on BCM283x SoCs is the receiver for either
> +CSI-2 or CCP2 data from image sensors or similar devices.
It would be nice to add some of your explanations to Hans in this
document or into the driver.
> +
> +Required properties:
> +===================
> +- compatible : must be "brcm,bcm2835-unicam".
> +- reg : physical base address and length of the register sets
> for the
> + device.
> +- interrupts : should contain the IRQ line for this Unicam instance.
> +- clocks : list of clock specifiers, corresponding to entries in
> + clock-names property.
> +- clock-names : must contain an "lp_clock" entry, matching entries
> + in the clocks property.
> +
> +Optional properties
> +===================
> +- max-data-lanes: the hardware can support varying numbers of clock lanes.
> + This value is the maximum number supported by this instance.
> + Known values of 2 or 4. Default is 2.
AFAIK, this isn't a common property yet. So possibly a vendor prefix
must be added.
> +
> +
> +Unicam supports a single port node. It should contain one 'port' child node
> +with child 'endpoint' node. Please refer to the bindings defined in
> +Documentation/devicetree/bindings/media/video-interfaces.txt.
> +
> +Example:
> + csi1: csi@7e801000 {
> + compatible = "brcm,bcm2835-unicam";
> + reg = <0x7e801000 0x800>,
> + <0x7e802004 0x4>;
> + interrupts = <2 7>;
> + clocks = <&clocks BCM2835_CLOCK_CAM1>;
> + clock-names = "lp_clock";
> +
> + port {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + endpoint {
> + remote-endpoint = <&tc358743_0>;
> +
> + };
> + };
> + };
> +
> + i2c0: i2c@7e205000 {
> +
> + tc358743: tc358743@0f {
Usually the node name should describe the function of the node for example:
tc358743: csi-hdmi-bridge@0f
Best regards
Stefan
> + compatible = "toshiba,tc358743";
> + reg = <0x0f>;
> + status = "okay";
> +
> + clocks = <&tc358743_clk>;
> + clock-names = "refclk";
> +
> + tc358743_clk: bridge-clk {
> + compatible = "fixed-clock";
> + #clock-cells = <0>;
> + clock-frequency = <27000000>;
> + };
> +
> + port {
> + tc358743_0: endpoint {
> + remote-endpoint = <&csi1>;
> + clock-lanes = <0>;
> + data-lanes = <1 2 3 4>;
> + clock-noncontinuous;
> + link-frequencies =
> + /bits/ 64 <297000000>;
> + };
> + };
> + };
> + };
