iio:core: timestamping clock selection support

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

View File

@@ -713,13 +713,13 @@ static irqreturn_t opt3001_irq(int irq, void *_iio)
IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_RISING),
iio_get_time_ns());
iio_get_time_ns(iio));
if (ret & OPT3001_CONFIGURATION_FL)
iio_push_event(iio,
IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0,
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_FALLING),
iio_get_time_ns());
iio_get_time_ns(iio));
} else if (ret & OPT3001_CONFIGURATION_CRF) {
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_RESULT);
if (ret < 0) {