Hi Jacopo,
On Thu, Jan 04, 2018 at 10:52:33AM +0100, Jacopo Mondi wrote:
> Describe newly introduced OF properties for ov7670 image sensor.
> The driver supports two standard properties to configure synchronism
> signals polarities and two custom properties already supported as
> platform data options by the driver.
> ---
> Documentation/devicetree/bindings/media/i2c/ov7670.txt | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/media/i2c/ov7670.txt
> b/Documentation/devicetree/bindings/media/i2c/ov7670.txt
> index 826b656..57ded18 100644
> --- a/Documentation/devicetree/bindings/media/i2c/ov7670.txt
> +++ b/Documentation/devicetree/bindings/media/i2c/ov7670.txt
> @@ -9,11 +9,22 @@ Required Properties:
> - clocks: reference to the xclk input clock.
> - clock-names: should be "xclk".
>
> +The following properties, as defined by video interfaces OF bindings
> +"Documentation/devicetree/bindings/media/video-interfaces.txt" are supported:
> +
> +- hsync-active: active state of the HSYNC signal, 0/1 for LOW/HIGH
> respectively.
> +- vsync-active: active state of the VSYNC signal, 0/1 for LOW/HIGH
> respectively.
Shouldn't these be mandatory?
If you make them optional, the V4L2 fwnode functions will give you Bt.656
as nothing tells that the signals are there --- which is probably not what
you want. The sensor also supports that, though, if you wish to add support
for it later on.
> +
> +Default is high active state for both vsync and hsync signals.
> +
> Optional Properties:
> - reset-gpios: reference to the GPIO connected to the resetb pin, if any.
> Active is low.
> - powerdown-gpios: reference to the GPIO connected to the pwdn pin, if any.
> Active is high.
> +- ov7670,pll-bypass: set to 1 to bypass PLL for pixel clock generation.
> +- ov7670,pclk-hb-disable: set to 1 to suppress pixel clock output signal
> during
> + horizontal blankings.
>
> The device node must contain one 'port' child node for its digital output
> video port, in accordance with the video interface bindings defined in
> @@ -34,6 +45,9 @@ Example:
> assigned-clocks = <&pck0>;
> assigned-clock-rates = <25000000>;
>
> + vsync-active = <0>;
> + ov7670,pclk-hb-disable = <1>;
> +
> port {
> ov7670_0: endpoint {
> remote-endpoint = <&isi_0>;
> --
> 2.7.4
>
--
Sakari Ailus
e-mail: sakari.ai...@iki.fi
