diff options
| author | David Brownell <david-b@pacbell.net> | 2007-10-13 23:56:32 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@hyperion.delvare> | 2007-10-13 23:56:32 +0200 |
| commit | 08fb68bb4bbc9c5970e4ed4920cb6144a70684cd (patch) | |
| tree | 531d027132f87ec878473a68afec556b423327e4 /include/linux/i2c-dev.h | |
| parent | 53be79593452e568a856f8393985131848d59b72 (diff) | |
| download | lwn-08fb68bb4bbc9c5970e4ed4920cb6144a70684cd.tar.gz lwn-08fb68bb4bbc9c5970e4ed4920cb6144a70684cd.zip | |
i2c: Move i2c-dev interfaces to i2c-dev.h
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>
Diffstat (limited to 'include/linux/i2c-dev.h')
| -rw-r--r-- | include/linux/i2c-dev.h | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/include/linux/i2c-dev.h b/include/linux/i2c-dev.h index 81c229a0fbca..311315b56b61 100644 --- a/include/linux/i2c-dev.h +++ b/include/linux/i2c-dev.h @@ -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 */ |