Minimize differences between kernel and user-space flavors of
<linux/i2c-dev.h>.
---
include/linux/i2c-dev.h | 60 +++++++++++++++++++++--------------------------
1 file changed, 27 insertions(+), 33 deletions(-)
--- i2c-tools.orig/include/linux/i2c-dev.h 2010-12-12 14:22:33.000000000 +0100
+++ i2c-tools/include/linux/i2c-dev.h 2012-03-15 09:47:41.134895370 +0100
@@ -20,10 +20,8 @@
MA 02110-1301 USA.
*/
-/* $Id: i2c-dev.h 5894 2010-12-12 13:22:29Z khali $ */
-
-#ifndef LIB_I2CDEV_H
-#define LIB_I2CDEV_H
+#ifndef _LINUX_I2C_DEV_H
+#define _LINUX_I2C_DEV_H
#include <linux/types.h>
#include <sys/ioctl.h>
@@ -111,52 +109,48 @@ 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.
+/* /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
*/
- /* -> 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_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 */
-#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 */
+/* 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_SMBUS 0x0720 /* SMBus-level access */
+#define I2C_FUNCS 0x0705 /* Get the adapter functionality mask */
-/* -- i2c.h -- */
+#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 */
-/* Note: 10-bit addresses are NOT supported! */
/* This is the structure as used in the I2C_SMBUS ioctl call */
struct i2c_smbus_ioctl_data {
- char read_write;
+ __u8 read_write;
__u8 command;
- int size;
+ __u32 size;
union i2c_smbus_data *data;
};
/* This is the structure as used in the I2C_RDWR ioctl call */
struct i2c_rdwr_ioctl_data {
struct i2c_msg *msgs; /* pointers to i2c_msgs */
- int nmsgs; /* number of i2c_msgs */
+ __u32 nmsgs; /* number of i2c_msgs */
};
+#define I2C_RDRW_IOCTL_MAX_MSGS 42
+
static inline __s32 i2c_smbus_access(int file, char read_write, __u8 command,
int size, union i2c_smbus_data *data)
@@ -332,4 +326,4 @@ static inline __s32 i2c_smbus_block_proc
}
-#endif /* LIB_I2CDEV_H */
+#endif /* _LINUX_I2C_DEV_H */
--
Jean Delvare
--
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