Adds a new function iio_get_time_res() to retrieve the current timestamping
clock resolution.
Signed-off-by: Gregor Boirie <gregor.boirie@xxxxxxxxxx>
---
drivers/iio/industrialio-core.c | 23 +++++++++++++++++++++++
include/linux/iio/iio.h | 1 +
2 files changed, 24 insertions(+)
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 97bdb95..eb56cdf 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -212,6 +212,29 @@ s64 iio_get_time_ns(const struct iio_dev* indio_dev)
}
EXPORT_SYMBOL(iio_get_time_ns);
+/**
+ * iio_get_time_res() - utility function to get time stamp clock resolution in
+ * nano seconds.
+ * @indio_dev: device
+ */
+unsigned int iio_get_time_res(const struct iio_dev* indio_dev)
+{
+ switch (indio_dev->clock_id) {
+ case CLOCK_REALTIME:
+ case CLOCK_MONOTONIC:
+ case CLOCK_MONOTONIC_RAW:
+ case CLOCK_BOOTTIME:
+ case CLOCK_TAI:
+ return hrtimer_resolution;
+ case CLOCK_REALTIME_COARSE:
+ case CLOCK_MONOTONIC_COARSE:
+ return LOW_RES_NSEC;
+ default:
+ BUG();
+ }
+}
+EXPORT_SYMBOL(iio_get_time_res);
+
static int __init iio_init(void)
{
int ret;
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index 904a5b0..931b0ab 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -282,6 +282,7 @@ static inline bool iio_channel_has_info(const struct iio_chan_spec *chan,
}
extern s64 iio_get_time_ns(const struct iio_dev*);
+extern unsigned int iio_get_time_res(const struct iio_dev*);
/* Device operating modes */
#define INDIO_DIRECT_MODE 0x01
--
2.1.4
--
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