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media: dt-bindings: Add OF properties to ov7670

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Describe newly introduced OF properties for ov7670 image sensor.
The driver supports two standard properties to configure synchronism
signals polarities and one custom property already supported as
platform data options to suppress pixel clock during horizontal
blankings.

Re-phrase child nodes description while at there.

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Jacopo Mondi 2018-01-24 04:30:49 -05:00 committed by Mauro Carvalho Chehab
parent 36e49ffb97
commit 622b2d10fc
1 changed files with 14 additions and 2 deletions
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16
Documentation/devicetree/bindings/media/i2c/ov7670.txt
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@ -9,14 +9,21 @@ Required Properties:
- clocks: reference to the xclk input clock.
- clock-names: should be "xclk".
Required Endpoint Properties:
- 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.
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,pclk-hb-disable: a boolean property 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
The device node must contain one 'port' child node with one 'endpoint' child
sub-node for its digital output video port, in accordance with the video
interface bindings defined in:
Documentation/devicetree/bindings/media/video-interfaces.txt.
Example:
@ -34,8 +41,13 @@ Example:
assigned-clocks = <&pck0>;
assigned-clock-rates = <25000000>;
ov7670,pclk-hb-disable;
port {
ov7670_0: endpoint {
hsync-active = <0>;
vsync-active = <0>;
remote-endpoint = <&isi_0>;
};
};