The same channel can be used to perform a signed or an unsigned
conversion. Add a new infomask element to be able to select the type of
conversion wanted: a raw one or a signed raw one.
Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
---
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 3c66248..161733c 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -1501,3 +1501,13 @@ Contact: linux-iio@xxxxxxxxxxxxxxx
Description:
Raw (unscaled no offset etc.) pH reading of a substance as a negative
base-10 logarithm of hydrodium ions in a litre of water.
+
+What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_signed
+What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_signed
+What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_i_signed
+What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_q_signed
+KernelVersion: 4.7
+Contact: linux-iio@xxxxxxxxxxxxxxx
+Description:
+ Signed (unscaled no bias removal etc.) voltage measurement from
+ channel Y.
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 70cb7eb..fb2ca27 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -147,6 +147,7 @@ static const char * const iio_chan_info_postfix[] = {
[IIO_CHAN_INFO_DEBOUNCE_TIME] = "debounce_time",
[IIO_CHAN_INFO_CALIBEMISSIVITY] = "calibemissivity",
[IIO_CHAN_INFO_OVERSAMPLING_RATIO] = "oversampling_ratio",
+ [IIO_CHAN_INFO_SIGNED] = "signed",
};
/**
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index b2b1677..6f5eb24 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -46,6 +46,7 @@ enum iio_chan_info_enum {
IIO_CHAN_INFO_DEBOUNCE_TIME,
IIO_CHAN_INFO_CALIBEMISSIVITY,
IIO_CHAN_INFO_OVERSAMPLING_RATIO,
+ IIO_CHAN_INFO_SIGNED,
};
enum iio_shared_by {
--
2.5.0
--
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