Renesas Capture Engine Unit (CEU)
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----------------------------------------------
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The Capture Engine Unit is the image capture interface found in the Renesas
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SH Mobile, R-Mobile and RZ SoCs.
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The interface supports a single parallel input with data bus width of 8 or 16
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bits.
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Required properties:
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- compatible: Shall be one of the following values:
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"renesas,r7s72100-ceu" for CEU units found in RZ/A1H and RZ/A1M SoCs
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"renesas,r8a7740-ceu" for CEU units found in R-Mobile A1 R8A7740 SoCs
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- reg: Registers address base and size.
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- interrupts: The interrupt specifier.
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The CEU supports a single parallel input and should contain a single 'port'
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subnode with a single 'endpoint'. Connection to input devices are modeled
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according to the video interfaces OF bindings specified in:
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Documentation/devicetree/bindings/media/video-interfaces.txt
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Optional endpoint properties applicable to parallel input bus described in
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the above mentioned "video-interfaces.txt" file are supported.
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- hsync-active: Active state of the HSYNC signal, 0/1 for LOW/HIGH respectively.
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If property is not present, default is active high.
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- vsync-active: Active state of the VSYNC signal, 0/1 for LOW/HIGH respectively.
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If property is not present, default is active high.
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Example:
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The example describes the connection between the Capture Engine Unit and an
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OV7670 image sensor connected to i2c1 interface.
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ceu: ceu@e8210000 {
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reg = <0xe8210000 0x209c>;
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compatible = "renesas,r7s72100-ceu";
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interrupts = <GIC_SPI 332 IRQ_TYPE_LEVEL_HIGH>;
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pinctrl-names = "default";
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pinctrl-0 = <&vio_pins>;
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status = "okay";
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port {
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ceu_in: endpoint {
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remote-endpoint = <&ov7670_out>;
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hsync-active = <1>;
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vsync-active = <0>;
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};
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};
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};
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i2c1: i2c@fcfee400 {
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pinctrl-names = "default";
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pinctrl-0 = <&i2c1_pins>;
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status = "okay";
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clock-frequency = <100000>;
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ov7670: camera@21 {
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compatible = "ovti,ov7670";
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reg = <0x21>;
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pinctrl-names = "default";
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pinctrl-0 = <&vio_pins>;
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reset-gpios = <&port3 11 GPIO_ACTIVE_LOW>;
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powerdown-gpios = <&port3 12 GPIO_ACTIVE_HIGH>;
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port {
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ov7670_out: endpoint {
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remote-endpoint = <&ceu_in>;
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hsync-active = <1>;
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vsync-active = <0>;
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};
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};
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};
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};
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