i2c: Add SCCB support

SCCB is a serial communication bus developed by Omnivision. Its 2-wire
mode is very similar to SMBus byte data transactions, but requires the
controller to ignore the ACK bit and to insert a stop condition after
each message.

Add a device SCCB flag and a message stop flag to be passed to
controller drivers.

[JD: Kill rogue definition in go7007 driver.]

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index ddfa04108baf..1d0fe4877b1f 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -425,6 +425,8 @@ void i2c_unlock_adapter(struct i2c_adapter *);
 #define I2C_CLIENT_TEN  0x10            /* we have a ten bit chip address */
                                         /* Must equal I2C_M_TEN below */
 #define I2C_CLIENT_WAKE 0x80            /* for board_info; true iff can wake */
+#define I2C_CLIENT_SCCB 0x9000          /* Use Omnivision SCCB protocol */
+                                        /* Must match I2C_M_STOP|IGNORE_NAK */
 
 /* i2c adapter classes (bitmask) */
 #define I2C_CLASS_HWMON         (1<<0)  /* lm_sensors, ... */
@@ -541,6 +543,7 @@ struct i2c_msg {
         __u16 flags;
 #define I2C_M_TEN               0x0010  /* this is a ten bit chip address */
 #define I2C_M_RD                0x0001  /* read data, from slave to master */
+#define I2C_M_STOP              0x8000  /* if I2C_FUNC_PROTOCOL_MANGLING */
 #define I2C_M_NOSTART           0x4000  /* if I2C_FUNC_NOSTART */
 #define I2C_M_REV_DIR_ADDR      0x2000  /* if I2C_FUNC_PROTOCOL_MANGLING */
 #define I2C_M_IGNORE_NAK        0x1000  /* if I2C_FUNC_PROTOCOL_MANGLING */