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iio:core: timestamping clock selection support

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Adds a new per-device sysfs attribute "current_timestamp_clock" to allow
userspace to select a particular POSIX clock for buffered samples and
events timestamping.

Following clocks, as listed in clock_gettime(2), are supported:
CLOCK_REALTIME, CLOCK_MONOTONIC, CLOCK_MONOTONIC_RAW,
CLOCK_REALTIME_COARSE, CLOCK_MONOTONIC_COARSE, CLOCK_BOOTTIME and
CLOCK_TAI.

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Acked-by: Sanchayan Maity <maitysanchayan@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Gregor Boirie
2016-03-09 19:05:49 +01:00
committed by Jonathan Cameron
parent eaaa7ec71b
commit bc2b7dab62
69 changed files with 327 additions and 114 deletions
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2
drivers/iio/light/stk3310.c
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@@ -528,7 +528,7 @@ static irqreturn_t stk3310_irq_handler(int irq, void *private)
struct iio_dev *indio_dev = private;
struct stk3310_data *data = iio_priv(indio_dev);
data->timestamp = iio_get_time_ns();
data->timestamp = iio_get_time_ns(indio_dev);
return IRQ_WAKE_THREAD;
}