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>

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 */

include/linux/i2c.h

@@ -557,38 +557,8 @@ union i2c_smbus_data {
 #define I2C_SMBUS_I2C_BLOCK_DATA    8
 
 
-/* ----- commands for the ioctl like i2c_command call:
- * note that additional calls are defined in the algorithm and hw
- *	dependent layers - these can be listed here, or see the
- *	corresponding header files.
- */
-				/* -> bit-adapter specific ioctls	*/
-#define I2C_RETRIES	0x0701	/* number of times a device address      */
-				/* should be polled when not            */
-                                /* acknowledging			*/
-#define I2C_TIMEOUT	0x0702	/* set timeout - call with int		*/
-
-
-/* this is for i2c-dev.c	*/
-#define I2C_SLAVE	0x0703	/* Change slave address			*/
-				/* Attn.: Slave address is 7 or 10 bits */
-#define I2C_SLAVE_FORCE	0x0706	/* Change slave address			*/
-				/* Attn.: Slave address is 7 or 10 bits */
-				/* This changes the address, even if it */
-				/* is already taken!			*/
-#define I2C_TENBIT	0x0704	/* 0 for 7 bit addrs, != 0 for 10 bit	*/
-
-#define I2C_FUNCS	0x0705	/* Get the adapter functionality */
-#define I2C_RDWR	0x0707	/* Combined R/W transfer (one stop only)*/
-#define I2C_PEC		0x0708	/* != 0 for SMBus PEC                   */
-
-#define I2C_SMBUS	0x0720	/* SMBus-level access */
-
-/* ----- I2C-DEV: char device interface stuff ------------------------- */
 #ifdef __KERNEL__
 
-#define I2C_MAJOR	89		/* Device major number		*/
-
 /* These defines are used for probing i2c client addresses */
 /* The length of the option lists */
 #define I2C_CLIENT_MAX_OPTS 48