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

Felipe Balbi
2012-10-25T12:31:29Z

From: Shubhrajyoti D <shubhrajyoti@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@ti.com>
Signed-off-by: Felipe Balbi <balbi@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