[PATCH v2 6/7] i2c: add 'transferred' field to struct i2c_msg

[Felipe Balbi]

From: Shubhrajyoti D <shubhrajyoti at ti.com>

In case of a NACK, it's wise to tell our clients
drivers about how many bytes were actually transferred.

Support this by adding an extra field to the struct
i2c_msg which gets incremented the amount of bytes
actually transferred.

Signed-off-by: Shubhrajyoti D <shubhrajyoti at ti.com>
Signed-off-by: Felipe Balbi <balbi at ti.com>
---
 include/uapi/linux/i2c.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/uapi/linux/i2c.h b/include/uapi/linux/i2c.h
index 0e949cb..4b35c9b 100644
--- a/include/uapi/linux/i2c.h
+++ b/include/uapi/linux/i2c.h
@@ -77,6 +77,7 @@ struct i2c_msg {
 #define I2C_M_NO_RD_ACK		0x0800	/* if I2C_FUNC_PROTOCOL_MANGLING */
 #define I2C_M_RECV_LEN		0x0400	/* length will be first received byte */
 	__u16 len;		/* msg length				*/
+	__u16 transferred;	/* actual bytes transferred             */
 	__u8 *buf;		/* pointer to msg data			*/
 };
 
-- 
1.8.0