Messages in this thread Patch in this message | | | From | Ludovic Desroches <> | Subject | [PATCH v2 1/2] iio: core: introduce IIO_CHAN_INFO_SIGNED | Date | Mon, 7 Mar 2016 15:29:56 +0100 |
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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@atmel.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 3c66248..161733c 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -1501,3 +1501,13 @@ Contact: linux-iio@vger.kernel.org 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@vger.kernel.org +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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