Hi Hans,
On Mon, Jan 30, 2017 at 03:06:20PM +0100, Hans Verkuil wrote:
> From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
>
> Document the device tree bindings for this driver.
>
> Mostly copied from the atmel-isc bindings.
>
> Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
> ---
> .../devicetree/bindings/media/atmel-isi.txt | 91 +++++++++++++---------
> 1 file changed, 56 insertions(+), 35 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/media/atmel-isi.txt b/Documentation/devicetree/bindings/media/atmel-isi.txt
> index 251f008..d1934b4 100644
> --- a/Documentation/devicetree/bindings/media/atmel-isi.txt
> +++ b/Documentation/devicetree/bindings/media/atmel-isi.txt
> @@ -1,51 +1,72 @@
> -Atmel Image Sensor Interface (ISI) SoC Camera Subsystem
> -----------------------------------------------
> +Atmel Image Sensor Interface (ISI)
> +----------------------------------
>
> -Required properties:
> -- compatible: must be "atmel,at91sam9g45-isi"
> -- reg: physical base address and length of the registers set for the device;
> -- interrupts: should contain IRQ line for the ISI;
> -- clocks: list of clock specifiers, corresponding to entries in
> - the clock-names property;
> -- clock-names: must contain "isi_clk", which is the isi peripherial clock.
> +Required properties for ISI:
> +- compatible
> + Must be "atmel,at91sam9g45-isi".
> +- reg
> + Physical base address and length of the registers set for the device.
> +- interrupts
> + Should contain IRQ line for the ISI.
> +- clocks
> + List of clock specifiers, corresponding to entries in
> + the clock-names property;
> + Please refer to clock-bindings.txt.
> +- clock-names
> + Required elements: "isi_clk".
> +- #clock-cells
> + Should be 0.
#clock-cells can't be found in the example. Does the ISI block provide a
#clock?
> +- pinctrl-names, pinctrl-0
> + Please refer to pinctrl-bindings.txt.
>
> ISI supports a single port node with parallel bus. 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.
We haven't documented exactly which properties are relevant for parallel
interfaces. I think we should, but until that's done we should explicitly
document which endpoint properties are mandatory and which are optional.
Such as in Documentation/devicetree/bindings/media/i2c/nokia,smia.txt .
>
> Example:
> - isi: isi@f0034000 {
> - compatible = "atmel,at91sam9g45-isi";
> - reg = <0xf0034000 0x4000>;
> - interrupts = <37 IRQ_TYPE_LEVEL_HIGH 5>;
>
> - clocks = <&isi_clk>;
> - clock-names = "isi_clk";
> +isi: isi@f0034000 {
> + compatible = "atmel,at91sam9g45-isi";
> + reg = <0xf0034000 0x4000>;
> + interrupts = <37 IRQ_TYPE_LEVEL_HIGH 5>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_isi_data_0_7>;
> + clocks = <&isi_clk>;
> + clock-names = "isi_clk";
> + status = "ok";
> + port {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + isi_0: endpoint {
> + reg = <0>;
> + remote-endpoint = <&ov2640_0>;
> + bus-width = <8>;
> + vsync-active = <1>;
> + hsync-active = <1>;
> + };
> + };
> +};
> +
> +i2c1: i2c@f0018000 {
> + status = "okay";
>
> + ov2640: camera@0x30 {
> + compatible = "ovti,ov2640";
> + reg = <0x30>;
> pinctrl-names = "default";
> - pinctrl-0 = <&pinctrl_isi>;
> + pinctrl-0 = <&pinctrl_pck0_as_isi_mck &pinctrl_sensor_power &pinctrl_sensor_reset>;
> + resetb-gpios = <&pioE 11 GPIO_ACTIVE_LOW>;
> + pwdn-gpios = <&pioE 13 GPIO_ACTIVE_HIGH>;
> + clocks = <&pck0>;
> + clock-names = "xvclk";
> + assigned-clocks = <&pck0>;
> + assigned-clock-rates = <25000000>;
>
> port {
> - #address-cells = <1>;
> - #size-cells = <0>;
> -
> - isi_0: endpoint {
> - remote-endpoint = <&ov2640_0>;
> + ov2640_0: endpoint {
> + remote-endpoint = <&isi_0>;
> bus-width = <8>;
> };
> };
> };
> -
> - i2c1: i2c@f0018000 {
> - ov2640: camera@0x30 {
> - compatible = "ovti,ov2640";
> - reg = <0x30>;
> -
> - port {
> - ov2640_0: endpoint {
> - remote-endpoint = <&isi_0>;
> - bus-width = <8>;
> - };
> - };
> - };
> - };
> +};
> --
> 2.10.2
>
--
Kind regards,
Sakari Ailus
e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx
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