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    Subject[PATCH v4 0/4] iio: add unit-converter
    Date
    Hi!

    This driver implements support for voltage dividers, current sense
    shunts and current sense amplifiers. It's pretty generic and should
    be easily adaptable to other linear scaling purposes.

    Cheers,
    Peter

    Changes since v3: https://lkml.org/lkml/2018/4/10/614
    - Split the bindings patch for voltage-divider and current-sense-shunt
    in two, thus retaining the tag from Rob on the latter, when the
    former got a major update. The voltage-divider binding is now
    clear of its history from the generic io-channel-unit-converter
    binding roots (v1 of the series) and makes much more sense on its
    own (IMHO).
    - Incorporate the confusing followup patches that added current sense
    amplification to the series.
    - Drop the adi,lt6106 binding from that followup and replace it with
    a generic current-sense-amplifier binding.
    - Adjust the driver to the above, and also rename it to iio-rescale
    as unit-converter was perhaps a little bit too generic even for the
    driver name.

    Changes since v2: https://lkml.org/lkml/2018/4/3/461
    - Rename from current-sence-circuit to current-sense-shunt (this
    should also fix all the typing problems I had with curciut).
    - Describe the shunt resistance directly (instead of indirectly
    in the form of a quotient).
    - Add a ->props() op to struct unit_converter_cfg to enable simple
    separation of properties for different converters.
    - Shuffle the code around to minimize forward declarations.
    - Drop the unused indio member from struct unit_converter.
    - Drop error report on iio driver registration failure.

    Changes since v1: https://lkml.org/lkml/2018/3/19/801
    - Put the driver in the new afe category (Analog Front Ends) and do not
    move the iio-mux driver.
    - Do not refer to the source channel as "parent", use "source" instead.
    - Have the DT compatible drive the target unit, instead of relying on a
    "type" DT-property for that.
    - In the DT bindings, use an unnamed source channel.
    - Do not set up writes to _RAW (sorry Phil) as I don't need it and have
    not tested it. It's easy to add back if needed.
    - Fail if the source channel does not support _RAW or _SCALE.
    - Fix various spelling issues.
    - Fix various code style issues.

    Peter Rosin (4):
    dt-bindings: iio: afe: add binding for current-sense-shunt
    dt-bindings: iio: afe: add binding for voltage-divider
    dt-bindings: iio: afe: add binding for current-sense-amplifier
    iio: afe: rescale: new driver

    .../bindings/iio/afe/current-sense-amplifier.txt | 26 ++
    .../bindings/iio/afe/current-sense-shunt.txt | 41 +++
    .../bindings/iio/afe/voltage-divider.txt | 53 +++
    MAINTAINERS | 9 +
    drivers/iio/Kconfig | 1 +
    drivers/iio/Makefile | 1 +
    drivers/iio/afe/Kconfig | 19 ++
    drivers/iio/afe/Makefile | 6 +
    drivers/iio/afe/iio-rescale.c | 359 +++++++++++++++++++++
    9 files changed, 515 insertions(+)
    create mode 100644 Documentation/devicetree/bindings/iio/afe/current-sense-amplifier.txt
    create mode 100644 Documentation/devicetree/bindings/iio/afe/current-sense-shunt.txt
    create mode 100644 Documentation/devicetree/bindings/iio/afe/voltage-divider.txt
    create mode 100644 drivers/iio/afe/Kconfig
    create mode 100644 drivers/iio/afe/Makefile
    create mode 100644 drivers/iio/afe/iio-rescale.c

    --
    2.11.0

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