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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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4
drivers/i2c/i2c-core.c
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@@ -1183,7 +1183,7 @@ EXPORT_SYMBOL(i2c_transfer);
* i2c_master_send - issue a single I2C message in master transmit mode
* @client: Handle to slave device
* @buf: Data that will be written to the slave
* @count: How many bytes to write
* @count: How many bytes to write, must be less than 64k since msg.len is u16
*
* Returns negative errno, or else the number of bytes written.
*/
@@ -1210,7 +1210,7 @@ EXPORT_SYMBOL(i2c_master_send);
* i2c_master_recv - issue a single I2C message in master receive mode
* @client: Handle to slave device
* @buf: Where to store data read from slave
* @count: How many bytes to read
* @count: How many bytes to read, must be less than 64k since msg.len is u16
*
* Returns negative errno, or else the number of bytes read.
*/