1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * HID over I2C protocol implementation 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com> 5*4882a593Smuzhiyun * Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public 8*4882a593Smuzhiyun * License. See the file COPYING in the main directory of this archive for 9*4882a593Smuzhiyun * more details. 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #ifndef __LINUX_I2C_HID_H 13*4882a593Smuzhiyun #define __LINUX_I2C_HID_H 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #include <linux/regulator/consumer.h> 16*4882a593Smuzhiyun #include <linux/types.h> 17*4882a593Smuzhiyun 18*4882a593Smuzhiyun /** 19*4882a593Smuzhiyun * struct i2chid_platform_data - used by hid over i2c implementation. 20*4882a593Smuzhiyun * @hid_descriptor_address: i2c register where the HID descriptor is stored. 21*4882a593Smuzhiyun * @supplies: regulators for powering on the device. 22*4882a593Smuzhiyun * @post_power_delay_ms: delay after powering on before device is usable. 23*4882a593Smuzhiyun * 24*4882a593Smuzhiyun * Note that it is the responsibility of the platform driver (or the acpi 5.0 25*4882a593Smuzhiyun * driver, or the flattened device tree) to setup the irq related to the gpio in 26*4882a593Smuzhiyun * the struct i2c_board_info. 27*4882a593Smuzhiyun * The platform driver should also setup the gpio according to the device: 28*4882a593Smuzhiyun * 29*4882a593Smuzhiyun * A typical example is the following: 30*4882a593Smuzhiyun * irq = gpio_to_irq(intr_gpio); 31*4882a593Smuzhiyun * hkdk4412_i2c_devs5[0].irq = irq; // store the irq in i2c_board_info 32*4882a593Smuzhiyun * gpio_request(intr_gpio, "elan-irq"); 33*4882a593Smuzhiyun * s3c_gpio_setpull(intr_gpio, S3C_GPIO_PULL_UP); 34*4882a593Smuzhiyun */ 35*4882a593Smuzhiyun struct i2c_hid_platform_data { 36*4882a593Smuzhiyun u16 hid_descriptor_address; 37*4882a593Smuzhiyun struct regulator_bulk_data supplies[2]; 38*4882a593Smuzhiyun int post_power_delay_ms; 39*4882a593Smuzhiyun }; 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun #endif /* __LINUX_I2C_HID_H */ 42