hid-over-i2c.txt

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    1 * HID over I2C Device-Tree bindings
    2 
    3 HID over I2C provides support for various Human Interface Devices over the
    4 I2C bus. These devices can be for example touchpads, keyboards, touch screens
    5 or sensors.
    6 
    7 The specification has been written by Microsoft and is currently available here:
    8 http://msdn.microsoft.com/en-us/library/windows/hardware/hh852380.aspx
    9 
   10 If this binding is used, the kernel module i2c-hid will handle the communication
   11 with the device and the generic hid core layer will handle the protocol.
   12 
   13 Required properties:
   14 - compatible: must be "hid-over-i2c"
   15 - reg: i2c slave address
   16 - hid-descr-addr: HID descriptor address
   17 - interrupts: interrupt line
   18 
   19 Additional optional properties:
   20 
   21 Some devices may support additional optional properties to help with, e.g.,
   22 power sequencing. The following properties can be supported by one or more
   23 device-specific compatible properties, which should be used in addition to the
   24 "hid-over-i2c" string.
   25 
   26 - compatible:
   27   * "wacom,w9013" (Wacom W9013 digitizer). Supports:
   28     - vdd-supply (3.3V)
   29     - vddl-supply (1.8V)
   30     - post-power-on-delay-ms
   31 
   32 - vdd-supply: phandle of the regulator that provides the supply voltage.
   33 - post-power-on-delay-ms: time required by the device after enabling its regulators
   34   or powering it on, before it is ready for communication.
   35 - touchscreen-inverted-x: See touchscreen.txt
   36 - touchscreen-inverted-y: See touchscreen.txt
   37 
   38 Example:
   39 
   40         i2c-hid-dev@2c {
   41                 compatible = "hid-over-i2c";
   42                 reg = <0x2c>;
   43                 hid-descr-addr = <0x0020>;
   44                 interrupt-parent = <&gpx3>;
   45                 interrupts = <3 2>;
   46         };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/input/hid-over-i2c.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/input/hid-over-i2c.txt