[PATCH v1 0/4] iio: adc: Add support for LTC2378 and similar ADCs

[Marcelo Schmitt <marcelo.schmitt1@gmail.com>]

From: Marcelo Schmitt <marcelo.schmitt@analog.com>

This patch series adds support for LTC2378 and similar low noise, low power,
high speed, successive approximation register (SAR) ADCs. These ADCs are similar
among each other, varying mainly on the amount of precision bits, maximum sample
rate, and input configuration (either fully differential or pseudo-differential).

The initial support patch enables single-shot sample read with a GPIO connected
to the CNV pin.

The second support patch enables high-speed data captures with SPI offloading.
The setup is similar to AD4030, with a specialized PWM generator being used both
for SPI offload triggering and conversion start signaling. 

The last support patch enables running buffered data captures without SPI offloading.

Some structures and variables are introduced earlier to reduce diff in latter patches.

With best regards,
Marcelo


Marcelo Schmitt (4):
  dt-bindings: iio: adc: Add ltc2378
  iio: adc: Add support for LTC2378-20 and similar ADCs
  iio: adc: ltc2378: Enable high-speed data capture
  iio: adc: ltc2378: Enable triggered buffer data capture

 .../bindings/iio/adc/adi,ltc2378.yaml         | 131 +++++
 MAINTAINERS                                   |   8 +
 drivers/iio/adc/Kconfig                       |  25 +
 drivers/iio/adc/Makefile                      |   2 +
 drivers/iio/adc/ltc2378-offload-buffer.c      | 297 ++++++++++++
 drivers/iio/adc/ltc2378.c                     | 447 ++++++++++++++++++
 drivers/iio/adc/ltc2378.h                     |  82 ++++
 7 files changed, 992 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ltc2378.yaml
 create mode 100644 drivers/iio/adc/ltc2378-offload-buffer.c
 create mode 100644 drivers/iio/adc/ltc2378.c
 create mode 100644 drivers/iio/adc/ltc2378.h


base-commit: 8678fb54958893818ddeccd05fea560a4e1fc759
-- 
2.53.0