/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note *//* * i2c-dev.h - I2C bus char device interface * * Copyright (C) 1995-97 Simon G. Vogl * Copyright (C) 1998-99 Frodo Looijaard <frodol@dds.nl> */ #ifndef _UAPI_LINUX_I2C_DEV_H#define _UAPI_LINUX_I2C_DEV_H #include <linux/types.h>#include <linux/compiler.h> /* /dev/i2c-X ioctl commands.  The ioctl's parameter is always an * unsigned long, except for: *	- I2C_FUNCS, takes pointer to an unsigned long *	- I2C_RDWR, takes pointer to struct i2c_rdwr_ioctl_data *	- I2C_SMBUS, takes pointer to struct i2c_smbus_ioctl_data */#define I2C_RETRIES	0x0701	/* number of times a device address should				   be polled when not acknowledging */#define I2C_TIMEOUT	0x0702	/* set timeout in units of 10 ms */ /* NOTE: Slave address is 7 or 10 bits, but 10-bit addresses * are NOT supported! (due to code brokenness) */#define I2C_SLAVE	0x0703	/* Use this slave address */#define I2C_SLAVE_FORCE	0x0706	/* Use this slave address, even if it				   is already in use by a driver! */#define I2C_TENBIT	0x0704	/* 0 for 7 bit addrs, != 0 for 10 bit */ #define I2C_FUNCS	0x0705	/* Get the adapter functionality mask */ #define I2C_RDWR	0x0707	/* Combined R/W transfer (one STOP only) */ #define I2C_PEC		0x0708	/* != 0 to use PEC with SMBus */#define I2C_SMBUS	0x0720	/* SMBus transfer */  /* This is the structure as used in the I2C_SMBUS ioctl call */struct i2c_smbus_ioctl_data {	__u8 read_write;	__u8 command;	__u32 size;	union i2c_smbus_data __user *data;}; /* This is the structure as used in the I2C_RDWR ioctl call */struct i2c_rdwr_ioctl_data {	struct i2c_msg __user *msgs;	/* pointers to i2c_msgs */	__u32 nmsgs;			/* number of i2c_msgs */}; #define  I2C_RDWR_IOCTL_MAX_MSGS	42/* Originally defined with a typo, keep it for compatibility */#define  I2C_RDRW_IOCTL_MAX_MSGS	I2C_RDWR_IOCTL_MAX_MSGS  #endif /* _UAPI_LINUX_I2C_DEV_H */