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authorLinus Walleij <linus.walleij@linaro.org>2016-09-01 10:27:18 +0200
committerJonathan Cameron <jic23@kernel.org>2016-09-10 17:49:25 +0200
commit7ba4b884b7a890e240a13f5f65d607721e80396a (patch)
tree2ffcd550080765de4d56056bea87e1152be73f81 /drivers/iio/common/st_sensors
parentiio: trigger: helpers to determine own trigger (diff)
downloadlinux-7ba4b884b7a890e240a13f5f65d607721e80396a.tar.xz
linux-7ba4b884b7a890e240a13f5f65d607721e80396a.zip
iio: st_sensors: use the helper function
The ST sensors can be used as a trigger for its own triggered buffer but it is also possible to use an external trigger: a HRTimer or even a different sensor (!) as trigger. In that case we should not pick the timestamp from our own interrupt top half even if it is active. This could practically happen if some other sensor is using the ST sensor as trigger but the ST sensor itself is using e.g. an HRTimer as trigger. So the trigger is on, but not used by us. We used to assume that whenever the hardware interrupt is turned on, we are using it for our own trigger, but this is an oversimplification. Handle this logically by using the iio_trigger_using_own() helper. Cc: Giuseppe Barba <giuseppe.barba@st.com> Cc: Denis Ciocca <denis.ciocca@st.com> Cc: Crestez Dan Leonard <leonard.crestez@intel.com> Cc: Gregor Boirie <gregor.boirie@parrot.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/common/st_sensors')
-rw-r--r--drivers/iio/common/st_sensors/st_sensors_buffer.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iio/common/st_sensors/st_sensors_buffer.c b/drivers/iio/common/st_sensors/st_sensors_buffer.c
index d06e728cea37..fe7775bb3740 100644
--- a/drivers/iio/common/st_sensors/st_sensors_buffer.c
+++ b/drivers/iio/common/st_sensors/st_sensors_buffer.c
@@ -63,7 +63,7 @@ irqreturn_t st_sensors_trigger_handler(int irq, void *p)
* the hardware trigger) and the hw_timestamp may get updated.
* By storing it in a local variable first, we are safe.
*/
- if (sdata->hw_irq_trigger)
+ if (iio_trigger_using_own(indio_dev))
timestamp = sdata->hw_timestamp;
else
timestamp = iio_get_time_ns(indio_dev);