linux-kernel - [PATCH v1 0/3] iio: afe: rescale: Add INFO

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Message-Id: <20190611095659.29845-1-mylene.josserand@bootlin.com>
Date:   Tue, 11 Jun 2019 11:56:56 +0200
From:   Mylène Josserand <mylene.josserand@...tlin.com>
To:     peda@...ntia.se, jic23@...nel.org, knaack.h@....de,
        lars@...afoo.de, pmeerw@...erw.net, robh+dt@...nel.org,
        mark.rutland@....com
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, thomas.petazzoni@...tlin.com,
        mylene.josserand@...tlin.com
Subject: [PATCH v1 0/3] iio: afe: rescale: Add INFO_PROCESSED support

Hello everyone,

You will find a small series that add the support of processed values
for iio-rescale driver.
Thanks to that, it is possible to read processed values in sysfs instead
of getting only raw and scale values.

Here is an example for a 3v3 voltage reading:
# cat /sys/bus/iio/devices/iio\:device1/in_voltage0_scale
3.791015625
# cat /sys/bus/iio/devices/iio\:device1/in_voltage0_raw
879
# cat /sys/bus/iio/devices/iio\:device1/in_voltage0_input
3332

It is also possible to read directly the processed values using iio-hwmon
driver (see example in patch03):

# cat /sys/class/hwmon/hwmon0/in1_input
3328

I seperated my series in 3 patches:
   - Patch01: Move the scale conversion into a function to prepare the
   support of IIO_CHAN_INFO_PROCESSED.
   - Patch02: Add the support of IIO_CHAN_INFO_PROCESSED.
   - Patch03: Add an example of the use of hwmon and voltage-divider nodes
   in device-tree.

If you have any feedbacks on it, I will be pleased to read them!

Best regards,
Mylène

Mylène Josserand (3):
  iio: afe: rescale: Move scale conversion to new function
  iio: afe: rescale: Add support of CHAN_INFO_PROCESSED
  dt-bindings: iio: afe: Add hwmon example

 .../bindings/iio/afe/voltage-divider.txt           | 24 ++++++
 drivers/iio/afe/iio-rescale.c                      | 96 ++++++++++++++++------
 2 files changed, 96 insertions(+), 24 deletions(-)

-- 
2.11.0