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i2c-bfin-twi: add debug output for error status 

Add some debug() code to decode the error register.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Michael Hennerich 2010-03-22 03:23:17 -04:00 committed by Ben Dooks
parent dd7319a528
commit 5cfafc18f3
1 changed files with 12 additions and 0 deletions
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12
drivers/i2c/busses/i2c-bfin-twi.c
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@ -157,6 +157,18 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface)
write_MASTER_CTL(iface, 0); write_MASTER_CTL(iface, 0);
SSYNC(); SSYNC();
iface->result = -EIO; iface->result = -EIO;
if (mast_stat & LOSTARB)
dev_dbg(&iface->adap.dev, "Lost Arbitration\n");
if (mast_stat & ANAK)
dev_dbg(&iface->adap.dev, "Address Not Acknowledged\n");
if (mast_stat & DNAK)
dev_dbg(&iface->adap.dev, "Data Not Acknowledged\n");
if (mast_stat & BUFRDERR)
dev_dbg(&iface->adap.dev, "Buffer Read Error\n");
if (mast_stat & BUFWRERR)
dev_dbg(&iface->adap.dev, "Buffer Write Error\n");
/* if both err and complete int stats are set, return proper /* if both err and complete int stats are set, return proper
* results. * results.
*/ */