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authorMichael Hennerich <michael.hennerich@analog.com>2010-03-22 03:23:17 -0400
committerBen Dooks <ben-linux@fluff.org>2010-05-20 00:18:58 +0100
commit5cfafc18f38aa6701f581bee875fb0b19f3b3b4b (patch)
tree7ba9d852b44238ee37c50bd0d80ddf76848f81ea /drivers/i2c/busses/i2c-bfin-twi.c
parentdd7319a5289deb4e17beb8851d343e7930b32c3b (diff)
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>
Diffstat (limited to 'drivers/i2c/busses/i2c-bfin-twi.c')
-rw-r--r--drivers/i2c/busses/i2c-bfin-twi.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c
index 441134a1df92..0279a7a6b86c 100644
--- a/drivers/i2c/busses/i2c-bfin-twi.c
+++ b/drivers/i2c/busses/i2c-bfin-twi.c
@@ -157,6 +157,18 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface)
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.
*/