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| author | Jean Delvare <khali@linux-fr.org> | 2007-05-01 23:26:29 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@hyperion.delvare> | 2007-05-01 23:26:29 +0200 |
| commit | 209d27c3b1676c0497108f0642c51a08b98a7856 (patch) | |
| tree | 434c063c4bd163ff242ae8a18bf65701bb6d39e6 /include/linux/i2c.h | |
| parent | 1ecac07abaca1a4084d0259d4a15b55188852a2e (diff) | |
| download | lwn-209d27c3b1676c0497108f0642c51a08b98a7856.tar.gz lwn-209d27c3b1676c0497108f0642c51a08b98a7856.zip | |
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.h | 1 |
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 */ }; |