include/linux/platform_data/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 struct regulator;
  18
  19 /**
  20  * struct i2chid_platform_data - used by hid over i2c implementation.
  21  * @hid_descriptor_address: i2c register where the HID descriptor is stored.
  22  * @supply: regulator for powering on the device.
  23  * @post_power_delay_ms: delay after powering on before device is usable.
  24  *
  25  * Note that it is the responsibility of the platform driver (or the acpi 5.0
  26  * driver, or the flattened device tree) to setup the irq related to the gpio in
  27  * the struct i2c_board_info.
  28  * The platform driver should also setup the gpio according to the device:
  29  *
  30  * A typical example is the following:
  31  *      irq = gpio_to_irq(intr_gpio);
  32  *      hkdk4412_i2c_devs5[0].irq = irq; // store the irq in i2c_board_info
  33  *      gpio_request(intr_gpio, "elan-irq");
  34  *      s3c_gpio_setpull(intr_gpio, S3C_GPIO_PULL_UP);
  35  */
  36 struct i2c_hid_platform_data {
  37         u16 hid_descriptor_address;
  38         struct regulator *supply;
  39         int post_power_delay_ms;
  40 };
  41
  42 #endif /* __LINUX_I2C_HID_H */