[PATCH 0/2] iio: adc: Add a current from voltage driver

[Jonathan Bakker]

In the discussion around adding the GP2A002 light driver, there came
up the question of what to do when a system emulates a current ADC
by using a voltage ADC and a resistor.  Rather than adding it on
a per-driver basis, it was suggested(1) to add a minimal IIO driver
to support this situation.

The new driver is fairly simple - it simply takes a voltage ADC and
a resistor value in ohms exposed as the scale and outputs a current.

It has been tested on a first-gen Galaxy S device which has the above
mentioned GP2A002 chip connected to the voltage ADC resistor complex.

1) https://lore.kernel.org/linux-iio/20200202150843.762c6897@archlinux/

Jonathan Bakker (2):
  dt-bindings: iio: adc: Add binding for current-from-voltage
  iio: adc: Add current-from-voltage driver

 .../iio/adc/linux,current-from-voltage.yaml   |  47 +++++++
 MAINTAINERS                                   |   8 ++
 drivers/iio/adc/Kconfig                       |   9 ++
 drivers/iio/adc/Makefile                      |   1 +
 drivers/iio/adc/current-from-voltage.c        | 123 ++++++++++++++++++
 5 files changed, 188 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/linux,current-from-voltage.yaml
 create mode 100644 drivers/iio/adc/current-from-voltage.c

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2.20.1