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, R-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 one of the following values:
  12         "renesas,r7s72100-ceu" for CEU units found in RZ/A1H and RZ/A1M SoCs
  13         "renesas,r8a7740-ceu" for CEU units found in R-Mobile A1 R8A7740 SoCs
  14 - reg: Registers address base and size.
  15 - interrupts: The interrupt specifier.
  16
  17 The CEU supports a single parallel input and should contain a single 'port'
  18 subnode with a single 'endpoint'. Connection to input devices are modeled
  19 according to the video interfaces OF bindings specified in:
  20 Documentation/devicetree/bindings/media/video-interfaces.txt
  21
  22 Optional endpoint properties applicable to parallel input bus described in
  23 the above mentioned "video-interfaces.txt" file are supported.
  24
  25 - hsync-active: Active state of the HSYNC signal, 0/1 for LOW/HIGH respectively.
  26   If property is not present, default is active high.
  27 - vsync-active: Active state of the VSYNC signal, 0/1 for LOW/HIGH respectively.
  28   If property is not present, default is active high.
  29
  30 Example:
  31
  32 The example describes the connection between the Capture Engine Unit and an
  33 OV7670 image sensor connected to i2c1 interface.
  34
  35 ceu: ceu@e8210000 {
  36         reg = <0xe8210000 0x209c>;
  37         compatible = "renesas,r7s72100-ceu";
  38         interrupts = <GIC_SPI 332 IRQ_TYPE_LEVEL_HIGH>;
  39
  40         pinctrl-names = "default";
  41         pinctrl-0 = <&vio_pins>;
  42
  43         status = "okay";
  44
  45         port {
  46                 ceu_in: endpoint {
  47                         remote-endpoint = <&ov7670_out>;
  48
  49                         hsync-active = <1>;
  50                         vsync-active = <0>;
  51                 };
  52         };
  53 };
  54
  55 i2c1: i2c@fcfee400 {
  56         pinctrl-names = "default";
  57         pinctrl-0 = <&i2c1_pins>;
  58
  59         status = "okay";
  60
  61         clock-frequency = <100000>;
  62
  63         ov7670: camera@21 {
  64                 compatible = "ovti,ov7670";
  65                 reg = <0x21>;
  66
  67                 pinctrl-names = "default";
  68                 pinctrl-0 = <&vio_pins>;
  69
  70                 reset-gpios = <&port3 11 GPIO_ACTIVE_LOW>;
  71                 powerdown-gpios = <&port3 12 GPIO_ACTIVE_HIGH>;
  72
  73                 port {
  74                         ov7670_out: endpoint {
  75                                 remote-endpoint = <&ceu_in>;
  76
  77                                 hsync-active = <1>;
  78                                 vsync-active = <0>;
  79                         };
  80                 };
  81         };
  82 };