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i2c: Move i2c-dev interfaces to i2c-dev.h

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Move the i2c-dev support into <linux/i2c-dev.h> where it should always
have lived.  Now <linux/i2c.h> no longer holds stuff related to the
optional userspace /dev/i2c-X interface.  Improve the descriptions
for these ioctl requests.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
David Brownell 2007-10-13 23:56:32 +02:00 • committed by Jean Delvare
parent 53be795934
commit 08fb68bb4b
2 changed files with 29 additions and 32 deletions
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31
include/linux/i2c-dev.h
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@ -25,8 +25,31 @@
#include <linux/types.h>
#include <linux/compiler.h>
/* Some IOCTL commands are defined in <linux/i2c.h> */
/* Note: 10-bit addresses are NOT supported! */
/* /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 jiffies - call with int */
/* 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 {
@ -44,4 +67,8 @@ struct i2c_rdwr_ioctl_data {
#define I2C_RDRW_IOCTL_MAX_MSGS 42
#ifdef __KERNEL__
#define I2C_MAJOR 89 /* Device major number */
#endif
#endif /* _LINUX_I2C_DEV_H */