Kernel-4.18.0-80.el8_renesas,ceu

Renesas Capture Engine Unit (CEU)

The Capture Engine Unit is the image capture interface found in the Renesas
SH Mobile, R-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 one of the following values:
  “renesas,r7s72100-ceu” for CEU units found in RZ/A1H and RZ/A1M SoCs
  “renesas,r8a7740-ceu” for CEU units found in R-Mobile A1 R8A7740 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>;
        };
    };
};

};