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