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i2c: Document the message size limit

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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>
This commit is contained in:
Zhangfei Gao
2010-03-02 12:23:49 +01:00
committed by Jean Delvare
parent eec74a257f
commit 0c43ea544c
3 changed files with 6 additions and 4 deletions
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5
Documentation/i2c/writing-clients
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@ -318,8 +318,9 @@ Plain I2C communication
These routines read and write some bytes from/to a client. The client
contains the i2c address, so you do not have to include it. The second
parameter contains the bytes to read/write, the third the number of bytes
to read/write (must be less than the length of the buffer.) Returned is
the actual number of bytes read/written.
to read/write (must be less than the length of the buffer, also should be
less than 64k since msg.len is u16.) Returned is the actual number of bytes
read/written.
int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msg,
int num);