diff options
Diffstat (limited to 'drivers/i2c/busses/scx200_acb.c')
| -rw-r--r-- | drivers/i2c/busses/scx200_acb.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c index 42e4e00d6c3..a140e4536a4 100644 --- a/drivers/i2c/busses/scx200_acb.c +++ b/drivers/i2c/busses/scx200_acb.c @@ -133,6 +133,9 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status) outb(inb(ACBCTL1) | ACBCTL1_STOP, ACBCTL1); outb(ACBST_STASTR | ACBST_NEGACK, ACBST); + + /* Reset the status register */ + outb(0, ACBST); return; } @@ -228,6 +231,10 @@ static void scx200_acb_poll(struct scx200_acb_iface *iface) timeout = jiffies + POLL_TIMEOUT; while (time_before(jiffies, timeout)) { status = inb(ACBST); + + /* Reset the status register to avoid the hang */ + outb(0, ACBST); + if ((status & (ACBST_SDAST|ACBST_BER|ACBST_NEGACK)) != 0) { scx200_acb_machine(iface, status); return; |