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>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/ds1wm.h b/include/linux/ds1wm.h
index 31f6e3c427fb..d3c65e48a2e7 100644
--- a/include/linux/ds1wm.h
+++ b/include/linux/ds1wm.h
@@ -6,6 +6,7 @@ struct ds1wm_platform_data {
                              * e.g. on h5xxx and h2200 this is 2
                              * (registers aligned to 4-byte boundaries),
                              * while on hx4700 this is 1 */
+        int active_high;
         void (*enable)(struct platform_device *pdev);
         void (*disable)(struct platform_device *pdev);
 };