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Subject[PATCH 1/3] iio: core: Introduce IIO_CHAN_INFO_CALIBREPETITIONS
Date
Some magnetometers can perform a number of repetitions in HW
for each measurement to increase accuracy. One example is
Bosch BMC150:
http://ae-bst.resource.bosch.com/media/products/dokumente/bmc150/BST-BMC150-DS000-04.pdf.

Introduce an interface to set the number of repetitions
for these devices.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
---
Documentation/ABI/testing/sysfs-bus-iio | 10 ++++++++++
drivers/iio/industrialio-core.c | 1 +
include/linux/iio/iio.h | 1 +
3 files changed, 12 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 866b4ec..74c1444 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -1375,3 +1375,13 @@ Description:
The emissivity ratio of the surface in the field of view of the
contactless temperature sensor. Emissivity varies from 0 to 1,
with 1 being the emissivity of a black body.
+
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_calibrepetitions
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_calibrepetitions
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_calibrepetitions
+KernelVersion: 4.2
+Contact: linux-iio@vger.kernel.org
+Description:
+ Hardware applied number of repetitions for acquiring one
+ data point. The HW will do <type>[_name]_calibrepetitions
+ measurements and return the average value as output data.
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 7c98bc1..9e0da7f 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -129,6 +129,7 @@ static const char * const iio_chan_info_postfix[] = {
[IIO_CHAN_INFO_DEBOUNCE_COUNT] = "debounce_count",
[IIO_CHAN_INFO_DEBOUNCE_TIME] = "debounce_time",
[IIO_CHAN_INFO_CALIBEMISSIVITY] = "calibemissivity",
+ [IIO_CHAN_INFO_CALIBREPETITIONS] = "calibrepetitions",
};

/**
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index b1e46ae..07fbfb2 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -44,6 +44,7 @@ enum iio_chan_info_enum {
IIO_CHAN_INFO_DEBOUNCE_COUNT,
IIO_CHAN_INFO_DEBOUNCE_TIME,
IIO_CHAN_INFO_CALIBEMISSIVITY,
+ IIO_CHAN_INFO_CALIBREPETITIONS,
};

enum iio_shared_by {
--
1.9.1


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