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>
diff --git a/include/linux/i2c-dev.h b/include/linux/i2c-dev.h
index 81c229a..311315b 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 @@
#define I2C_RDRW_IOCTL_MAX_MSGS 42
+#ifdef __KERNEL__
+#define I2C_MAJOR 89 /* Device major number */
+#endif
+
#endif /* _LINUX_I2C_DEV_H */