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>
diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c
index 441134a..0279a7a 100644
--- a/drivers/i2c/busses/i2c-bfin-twi.c
+++ b/drivers/i2c/busses/i2c-bfin-twi.c
@@ -157,6 +157,18 @@
write_MASTER_CTL(iface, 0);
SSYNC();
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
* results.
*/