Maxim MAX1241 driver

Hello again,

Here's version 4 of a patch series which adds support for the Maxim MAX1241, a 12-bit, single-channel, SPI-connected ADC.

Changelog so far:

v4:

* Dropped explicit documentation of SPI reg property
* Reordered patch series so that dt bindings come first

v3:

* Fixed silly copy-paste error in Kconfig description

v2:

* Removed useeless header includes
* Dropped needlessly verbose stuff in _read and _probe functions
* Dropped useless GPL notice
* Lowered log level of shdn pin status in probe function, now it's dev_dbg
* Added proper error checking for the GPIO shutdown pin
* remove now always returns zero (man, I've been wrong about this for *years* now...)
* Added regulator disable action, cleanup is now handled via devm
* Drop delay_usecs, use delay.value, delay.unit
* Drop config_of, of_match_ptr call
* Dropped IIO_BUFFER, IIO_TRIGGERED_BUFFER dependencies, set SPI_MASTER as dependency, fix indenting.
* DT binding: use correct id, add reg description (looks pretty standard), dropped spi-max-frequency, fixed dt_binding_check complaints (oops!)

All the best,
Alex

Alexandru Lazar (2):
dt-bindings: iio: adc: Add MAX1241 device tree bindings in
documentation
iio: adc: Add MAX1241 driver

 .../bindings/iio/adc/maxim,max1241.yaml       |  61 ++++++
 drivers/iio/adc/Kconfig                       |  10 +
 drivers/iio/adc/Makefile                      |   1 +
 drivers/iio/adc/max1241.c                     | 206 ++++++++++++++++++
 4 files changed, 278 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/maxim,max1241.yaml
 create mode 100644 drivers/iio/adc/max1241.c

2.25.2