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authorPhilipp Zabel <philipp.zabel@gmail.com>2008-02-07 00:13:22 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 08:42:06 -0800
commit4aa323bd839604dd83aec56ed3a88df352c3339d (patch)
treef9c349b851ddd473837382e87d3f10f22cda4a06 /drivers/w1/masters/ds1wm.c
parenteccba068915feece2868c502787037e244db3376 (diff)
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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/masters/ds1wm.c')
-rw-r--r--drivers/w1/masters/ds1wm.c9
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);