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