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Blackfin: TWI/I2C: fix pure writes

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If doing a pure write with register address and data (not a read/write
combo transfer), we don't set the initial transfer length properly which
ends up causing only the register address to be transferred.

While we're here, fix the i2c_write() parameter description of the buffer.

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Peter Meerwald 2009-06-29 15:48:33 -04:00 committed by Heiko Schocher
parent 3e88337b22
commit 98ab14e858
1 changed files with 2 additions and 2 deletions
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4
drivers/i2c/bfin-twi_i2c.c
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@ -164,7 +164,7 @@ static int i2c_transfer(uchar chip, uint addr, int alen, uchar *buffer, int len,
/* prime the pump */
if (msg.alen) {
len = msg.alen;
len = (msg.flags & I2C_M_COMBO) ? msg.alen : msg.alen + len;
debugi("first byte=0x%02x", *msg.abuf);
bfin_write_TWI_XMT_DATA8(*(msg.abuf++));
--msg.alen;
@ -275,7 +275,7 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
* @chip: i2c chip addr
* @addr: memory (register) address in the chip
* @alen: byte size of address
* @buffer: buffer to store data read from chip
* @buffer: buffer holding data to write to chip
* @len: how many bytes to write
* @return: 0 on success, non-0 on failure
*/