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* HID over I2C protocol implementation
* Copyright (c) 2012 Benjamin Tissoires <>
* Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
#ifndef __LINUX_I2C_HID_H
#define __LINUX_I2C_HID_H
#include <linux/regulator/consumer.h>
#include <linux/types.h>
* struct i2chid_platform_data - used by hid over i2c implementation.
* @hid_descriptor_address: i2c register where the HID descriptor is stored.
* @supplies: regulators for powering on the device.
* @post_power_delay_ms: delay after powering on before device is usable.
* Note that it is the responsibility of the platform driver (or the acpi 5.0
* driver, or the flattened device tree) to setup the irq related to the gpio in
* the struct i2c_board_info.
* The platform driver should also setup the gpio according to the device:
* A typical example is the following:
* irq = gpio_to_irq(intr_gpio);
* hkdk4412_i2c_devs5[0].irq = irq; // store the irq in i2c_board_info
* gpio_request(intr_gpio, "elan-irq");
* s3c_gpio_setpull(intr_gpio, S3C_GPIO_PULL_UP);
struct i2c_hid_platform_data {
u16 hid_descriptor_address;
struct regulator_bulk_data supplies[2];
int post_power_delay_ms;
#endif /* __LINUX_I2C_HID_H */