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authorJean Delvare <khali@linux-fr.org>2007-05-02 01:26:29 +0400
committerJean Delvare <khali@hyperion.delvare>2007-05-02 01:26:29 +0400
commit209d27c3b1676c0497108f0642c51a08b98a7856 (patch)
tree434c063c4bd163ff242ae8a18bf65701bb6d39e6 /include/linux/i2c.h
parent1ecac07abaca1a4084d0259d4a15b55188852a2e (diff)
downloadlinux-209d27c3b1676c0497108f0642c51a08b98a7856.tar.xz
i2c: Emulate SMBus block read over I2C
Let the I2C bus drivers emulate the SMBus Block Read and Block Process Call transactions if they wish. This requires to define a new message flag, which i2c-core will use to let the underlying I2C bus driver know that the first received byte will specify the length of the read message. Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'include/linux/i2c.h')
-rw-r--r--include/linux/i2c.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 568dd1007b53..563c9651dd37 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -366,6 +366,7 @@ struct i2c_msg {
#define I2C_M_REV_DIR_ADDR 0x2000
#define I2C_M_IGNORE_NAK 0x1000
#define I2C_M_NO_RD_ACK 0x0800
+#define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */
__u16 len; /* msg length */
__u8 *buf; /* pointer to msg data */
};