diff options
| author | Philipp Zabel <philipp.zabel@gmail.com> | 2008-02-07 00:13:22 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-07 08:42:06 -0800 |
| commit | 4aa323bd839604dd83aec56ed3a88df352c3339d (patch) | |
| tree | f9c349b851ddd473837382e87d3f10f22cda4a06 /drivers/w1 | |
| parent | eccba068915feece2868c502787037e244db3376 (diff) | |
| download | lwn-4aa323bd839604dd83aec56ed3a88df352c3339d.tar.gz lwn-4aa323bd839604dd83aec56ed3a88df352c3339d.zip | |
DS1WM: decouple host IRQ and INTR active state settings
The DS1WM driver incorrectly infers the IAS bit (1-wire interrupt active
high) from IRQ settings. There are devices that have IAS=0 but still need
the IRQ to trigger on a rising edge. With this patch, machines with DS1WM
that need IAS=1 have to set .active_high=1 in the ds1wm_platform_data.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Acked-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Acked-by: Matt Reimer <mreimer@vpop.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/w1')
| -rw-r--r-- | drivers/w1/masters/ds1wm.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/w1/masters/ds1wm.c b/drivers/w1/masters/ds1wm.c index 5747997f8d7d..688e435b4d9a 100644 --- a/drivers/w1/masters/ds1wm.c +++ b/drivers/w1/masters/ds1wm.c @@ -361,11 +361,12 @@ static int ds1wm_probe(struct platform_device *pdev) goto err1; } ds1wm_data->irq = res->start; - ds1wm_data->active_high = (res->flags & IORESOURCE_IRQ_HIGHEDGE) ? - 1 : 0; + ds1wm_data->active_high = plat->active_high; - set_irq_type(ds1wm_data->irq, ds1wm_data->active_high ? - IRQ_TYPE_EDGE_RISING : IRQ_TYPE_EDGE_FALLING); + if (res->flags & IORESOURCE_IRQ_HIGHEDGE) + set_irq_type(ds1wm_data->irq, IRQ_TYPE_EDGE_RISING); + if (res->flags & IORESOURCE_IRQ_LOWEDGE) + set_irq_type(ds1wm_data->irq, IRQ_TYPE_EDGE_FALLING); ret = request_irq(ds1wm_data->irq, ds1wm_isr, IRQF_DISABLED, "ds1wm", ds1wm_data); |