Documentation/devicetree/bindings/net/nfc/nfcmrvl.txt

   1 * Marvell International Ltd. NCI NFC Controller
   2
   3 Required properties:
   4 - compatible: Should be:
   5   - "marvell,nfc-uart" or "mrvl,nfc-uart" for UART devices
   6   - "marvell,nfc-i2c" for I2C devices
   7   - "marvell,nfc-spi" for SPI devices
   8
   9 Optional SoC specific properties:
  10 - pinctrl-names: Contains only one value - "default".
  11 - pintctrl-0: Specifies the pin control groups used for this controller.
  12 - reset-n-io: Output GPIO pin used to reset the chip (active low).
  13 - hci-muxed: Specifies that the chip is muxing NCI over HCI frames.
  14
  15 Optional UART-based chip specific properties:
  16 - flow-control: Specifies that the chip is using RTS/CTS.
  17 - break-control: Specifies that the chip needs specific break management.
  18
  19 Optional I2C-based chip specific properties:
  20 - i2c-int-falling: Specifies that the chip read event shall be trigged on
  21                    falling edge.
  22 - i2c-int-rising: Specifies that the chip read event shall be trigged on
  23                   rising edge.
  24
  25 Example (for ARM-based BeagleBoard Black with 88W8887 on UART5):
  26
  27 &uart5 {
  28         status = "okay";
  29
  30         nfcmrvluart: nfcmrvluart@5 {
  31                 compatible = "marvell,nfc-uart";
  32
  33                 reset-n-io = <&gpio3 16 0>;
  34
  35                 hci-muxed;
  36                 flow-control;
  37         }
  38 };
  39
  40
  41 Example (for ARM-based BeagleBoard Black with 88W8887 on I2C1):
  42
  43 &i2c1 {
  44         status = "okay";
  45         clock-frequency = <400000>;
  46
  47         nfcmrvli2c0: i2c@1 {
  48                 compatible = "marvell,nfc-i2c";
  49
  50                 reg = <0x8>;
  51
  52                 /* I2C INT configuration */
  53                 interrupt-parent = <&gpio3>;
  54                 interrupts = <21 0>;
  55
  56                 /* I2C INT trigger configuration */
  57                 i2c-int-rising;
  58
  59                 /* Reset IO */
  60                 reset-n-io = <&gpio3 19 0>;
  61         };
  62 };
  63
  64
  65 Example (for ARM-based BeagleBoard Black on SPI0):
  66
  67 &spi0 {
  68
  69         mrvlnfcspi0: spi@0 {
  70                 compatible = "marvell,nfc-spi";
  71
  72                 reg = <0>;
  73
  74                 /* SPI Bus configuration */
  75                 spi-max-frequency = <3000000>;
  76                 spi-cpha;
  77                 spi-cpol;
  78
  79                 /* SPI INT configuration */
  80                 interrupt-parent = <&gpio1>;
  81                 interrupts = <17 0>;
  82
  83                 /* Reset IO */
  84                 reset-n-io = <&gpio3 19 0>;
  85         };
  86 };