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media: dt-bindings: media: Add Renesas CEU bindings

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Add bindings documentation for Renesas Capture Engine Unit (CEU).

Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Jacopo Mondi 2018-02-21 12:47:55 -05:00 • committed by Mauro Carvalho Chehab
parent 52e17089d1
commit a444e5184f
1 changed files with 81 additions and 0 deletions
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Documentation/devicetree/bindings/media/renesas,ceu.txt Normal file
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Renesas Capture Engine Unit (CEU)
----------------------------------------------
The Capture Engine Unit is the image capture interface found in the Renesas
SH Mobile and RZ SoCs.
The interface supports a single parallel input with data bus width of 8 or 16
bits.
Required properties:
- compatible: Shall be "renesas,r7s72100-ceu" for CEU units found in RZ/A1H
and RZ/A1M SoCs.
- reg: Registers address base and size.
- interrupts: The interrupt specifier.
The CEU supports a single parallel input and should contain a single 'port'
subnode with a single 'endpoint'. Connection to input devices are modeled
according to the video interfaces OF bindings specified in:
Documentation/devicetree/bindings/media/video-interfaces.txt
Optional endpoint properties applicable to parallel input bus described in
the above mentioned "video-interfaces.txt" file are supported.
- hsync-active: Active state of the HSYNC signal, 0/1 for LOW/HIGH respectively.
If property is not present, default is active high.
- vsync-active: Active state of the VSYNC signal, 0/1 for LOW/HIGH respectively.
If property is not present, default is active high.
Example:
The example describes the connection between the Capture Engine Unit and an
OV7670 image sensor connected to i2c1 interface.
ceu: ceu@e8210000 {
reg = <0xe8210000 0x209c>;
compatible = "renesas,r7s72100-ceu";
interrupts = <GIC_SPI 332 IRQ_TYPE_LEVEL_HIGH>;
pinctrl-names = "default";
pinctrl-0 = <&vio_pins>;
status = "okay";
port {
ceu_in: endpoint {
remote-endpoint = <&ov7670_out>;
hsync-active = <1>;
vsync-active = <0>;
};
};
};
i2c1: i2c@fcfee400 {
pinctrl-names = "default";
pinctrl-0 = <&i2c1_pins>;
status = "okay";
clock-frequency = <100000>;
ov7670: camera@21 {
compatible = "ovti,ov7670";
reg = <0x21>;
pinctrl-names = "default";
pinctrl-0 = <&vio_pins>;
reset-gpios = <&port3 11 GPIO_ACTIVE_LOW>;
powerdown-gpios = <&port3 12 GPIO_ACTIVE_HIGH>;
port {
ov7670_out: endpoint {
remote-endpoint = <&ceu_in>;
hsync-active = <1>;
vsync-active = <0>;
};
};
};
};