[PATCH v1 0/3] iio: adc: Add AD4134 minimum I/O support

Marcelo Schmitt
2025-11-10T12:45:26Z

This patch series adds basic support for ad4134. AD4134 is a very flexible
device that can be configured in many different ways. This series aims to
support the simplest way of interfacing with AD4134 which is called minimum I/O
mode in data sheet. This is essentially usual SPI with the addition of an ODR
(Output Data Rate) GPIO which functions as conversion start signal in minimum
I/O mode. The CS pin may be connected to a host controller CS pin or grounded.

This set provides just one feature:
- Single-shot ADC sample read.

[PATCH 1] Device tree documentation for AD4134.
[PATCH 2] IIO Linux driver for AD4134.
[PATCH 3] Initial IIO documentation.

There is a driver by Cosmin on ADI Linux tree that supports AD4134 in wiring
configurations suited for high speed data transfers. Even though the minimum I/O
support was initialy based on that high speed transfer driver, the result ended
up becoming entirely different. Also, because the different wiring
configurations are likely going to use different resources and software
interfaces, the code for AD4134 support was split into ad4134-spi.c,
ad4134-common.h, and ad4134-common.c.

With best regards,
Marcelo

Marcelo Schmitt (3):
dt-bindings: iio: adc: Add AD4134
iio: adc: Initial support for AD4134
Docs: iio: Add AD4134

.../bindings/iio/adc/adi,ad4134.yaml | 209 +++++++++++++
Documentation/iio/ad4134.rst | 58 ++++
Documentation/iio/index.rst | 1 +
MAINTAINERS | 9 +
drivers/iio/adc/Kconfig | 15 +
drivers/iio/adc/Makefile | 2 +
drivers/iio/adc/ad4134-common.c | 200 ++++++++++++
drivers/iio/adc/ad4134-common.h | 132 ++++++++
drivers/iio/adc/ad4134-spi.c | 287 ++++++++++++++++++
9 files changed, 913 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad4134.yaml
create mode 100644 Documentation/iio/ad4134.rst
create mode 100644 drivers/iio/adc/ad4134-common.c
create mode 100644 drivers/iio/adc/ad4134-common.h
create mode 100644 drivers/iio/adc/ad4134-spi.c

base-commit: c5411c8b9ed1caf53604bb1a5be3f487988efc98
--
2.51.0