include/linux/i2c/i2c-hid.h

   1 /*
   2  * HID over I2C protocol implementation
   3  *
   4  * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
   5  * Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France
   6  *
   7  * This file is subject to the terms and conditions of the GNU General Public
   8  * License.  See the file COPYING in the main directory of this archive for
   9  * more details.
  10  */
  11
  12 #ifndef __LINUX_I2C_HID_H
  13 #define __LINUX_I2C_HID_H
  14
  15 #include <linux/types.h>
  16
  17 /**
  18  * struct i2chid_platform_data - used by hid over i2c implementation.
  19  * @hid_descriptor_address: i2c register where the HID descriptor is stored.
  20  *
  21  * Note that it is the responsibility of the platform driver (or the acpi 5.0
  22  * driver, or the flattened device tree) to setup the irq related to the gpio in
  23  * the struct i2c_board_info.
  24  * The platform driver should also setup the gpio according to the device:
  25  *
  26  * A typical example is the following:
  27  *      irq = gpio_to_irq(intr_gpio);
  28  *      hkdk4412_i2c_devs5[0].irq = irq; // store the irq in i2c_board_info
  29  *      gpio_request(intr_gpio, "elan-irq");
  30  *      s3c_gpio_setpull(intr_gpio, S3C_GPIO_PULL_UP);
  31  */
  32 struct i2c_hid_platform_data {
  33         u16 hid_descriptor_address;
  34 };
  35
  36 #endif /* __LINUX_I2C_HID_H */