Documentation/devicetree/bindings/media/renesas,ceu.txt

   1 Renesas Capture Engine Unit (CEU)
   2 ----------------------------------------------
   3
   4 The Capture Engine Unit is the image capture interface found in the Renesas
   5 SH Mobile and RZ SoCs.
   6
   7 The interface supports a single parallel input with data bus width of 8 or 16
   8 bits.
   9
  10 Required properties:
  11 - compatible: Shall be "renesas,r7s72100-ceu" for CEU units found in RZ/A1H
  12   and RZ/A1M SoCs.
  13 - reg: Registers address base and size.
  14 - interrupts: The interrupt specifier.
  15
  16 The CEU supports a single parallel input and should contain a single 'port'
  17 subnode with a single 'endpoint'. Connection to input devices are modeled
  18 according to the video interfaces OF bindings specified in:
  19 Documentation/devicetree/bindings/media/video-interfaces.txt
  20
  21 Optional endpoint properties applicable to parallel input bus described in
  22 the above mentioned "video-interfaces.txt" file are supported.
  23
  24 - hsync-active: Active state of the HSYNC signal, 0/1 for LOW/HIGH respectively.
  25   If property is not present, default is active high.
  26 - vsync-active: Active state of the VSYNC signal, 0/1 for LOW/HIGH respectively.
  27   If property is not present, default is active high.
  28
  29 Example:
  30
  31 The example describes the connection between the Capture Engine Unit and an
  32 OV7670 image sensor connected to i2c1 interface.
  33
  34 ceu: ceu@e8210000 {
  35         reg = <0xe8210000 0x209c>;
  36         compatible = "renesas,r7s72100-ceu";
  37         interrupts = <GIC_SPI 332 IRQ_TYPE_LEVEL_HIGH>;
  38
  39         pinctrl-names = "default";
  40         pinctrl-0 = <&vio_pins>;
  41
  42         status = "okay";
  43
  44         port {
  45                 ceu_in: endpoint {
  46                         remote-endpoint = <&ov7670_out>;
  47
  48                         hsync-active = <1>;
  49                         vsync-active = <0>;
  50                 };
  51         };
  52 };
  53
  54 i2c1: i2c@fcfee400 {
  55         pinctrl-names = "default";
  56         pinctrl-0 = <&i2c1_pins>;
  57
  58         status = "okay";
  59
  60         clock-frequency = <100000>;
  61
  62         ov7670: camera@21 {
  63                 compatible = "ovti,ov7670";
  64                 reg = <0x21>;
  65
  66                 pinctrl-names = "default";
  67                 pinctrl-0 = <&vio_pins>;
  68
  69                 reset-gpios = <&port3 11 GPIO_ACTIVE_LOW>;
  70                 powerdown-gpios = <&port3 12 GPIO_ACTIVE_HIGH>;
  71
  72                 port {
  73                         ov7670_out: endpoint {
  74                                 remote-endpoint = <&ceu_in>;
  75
  76                                 hsync-active = <1>;
  77                                 vsync-active = <0>;
  78                         };
  79                 };
  80         };
  81 };