diff options
| author | Ben Gardner <bgardner@wabtec.com> | 2006-01-18 22:52:06 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-03-23 14:21:50 -0800 |
| commit | f933ff504f5b3f0f94b98d69d48fc8d3c1e92267 (patch) | |
| tree | 8dab006c4b542ab5f856850e1884e2ac8e1c84a5 | |
| parent | 16ffc5c99554bc1630bc3939e0950a75b2b1c811 (diff) | |
[PATCH] i2c: scx200_acb fix and speed up the poll loop
scx200_acb: Fix and speed up the poll loop
Signed-off-by: Ben Gardner <bgardner@wabtec.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/i2c/busses/scx200_acb.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c index 0ae77f84ffe8..8e646bdb556c 100644 --- a/drivers/i2c/busses/scx200_acb.c +++ b/drivers/i2c/busses/scx200_acb.c @@ -47,10 +47,7 @@ static int base[MAX_DEVICES] = { 0x820, 0x840 }; module_param_array(base, int, NULL, 0); MODULE_PARM_DESC(base, "Base addresses for the ACCESS.bus controllers"); -/* The hardware supports interrupt driven mode too, but I haven't - implemented that. */ -#define POLLED_MODE 1 -#define POLL_TIMEOUT (HZ) +#define POLL_TIMEOUT (HZ/5) enum scx200_acb_state { state_idle, @@ -222,7 +219,6 @@ static void scx200_acb_machine(struct scx200_acb_iface *iface, u8 status) iface->needs_reset = 1; } -#ifdef POLLED_MODE static void scx200_acb_poll(struct scx200_acb_iface *iface) { u8 status; @@ -235,7 +231,7 @@ static void scx200_acb_poll(struct scx200_acb_iface *iface) scx200_acb_machine(iface, status); return; } - msleep(10); + yield(); } dev_err(&iface->adapter.dev, "timeout in state %s\n", @@ -245,7 +241,6 @@ static void scx200_acb_poll(struct scx200_acb_iface *iface) iface->result = -EIO; iface->needs_reset = 1; } -#endif /* POLLED_MODE */ static void scx200_acb_reset(struct scx200_acb_iface *iface) { @@ -335,12 +330,8 @@ static s32 scx200_acb_smbus_xfer(struct i2c_adapter *adapter, else iface->state = state_address; -#ifdef POLLED_MODE while (iface->state != state_idle) scx200_acb_poll(iface); -#else /* POLLED_MODE */ -#error Interrupt driven mode not implemented -#endif /* POLLED_MODE */ if (iface->needs_reset) scx200_acb_reset(iface); |