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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061/* 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 */