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authorZhangfei Gao <zgao6@marvell.com>2010-03-02 12:23:49 +0100
committerJean Delvare <khali@linux-fr.org>2010-03-02 12:23:49 +0100
commit0c43ea544c1086fbbed5a6c99ea58eb64674ea8f (patch)
tree1d50d78c261cd011667c12134d93f2d6d2caa6e5 /include/linux/i2c.h
parenteec74a257f0a695688ba44c0f6c1e92dc81459be (diff)
i2c: Document the message size limit
i2c_master_send & i2c_master_recv do not support more than 64 kb transfer, since msg.len is u16. Signed-off-by: Zhangfei Gao <zgao6@marvell.com> 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 476abd09c92..0a5da639b32 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -53,6 +53,7 @@ struct i2c_board_info;
* on a bus (or read from them). Apart from two basic transfer functions to
* transmit one message at a time, a more complex version can be used to
* transmit an arbitrary number of messages without interruption.
+ * @count must be be less than 64k since msg.len is u16.
*/
extern int i2c_master_send(struct i2c_client *client, const char *buf,
int count);