linux-kernel - [PATCH v2 0/3] iio: adc: Add AD4134 minimum I/O support

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Message-ID: <cover.1763478299.git.marcelo.schmitt@analog.com>
Date: Tue, 18 Nov 2025 14:31:57 -0300
From: Marcelo Schmitt <marcelo.schmitt@...log.com>
To: <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <jic23@...nel.org>, <nuno.sa@...log.com>, <dlechner@...libre.com>,
        <andy@...nel.org>, <Michael.Hennerich@...log.com>, <robh@...nel.org>,
        <krzk+dt@...nel.org>, <conor+dt@...nel.org>, <corbet@....net>,
        <cosmin.tanislav@...log.com>, <marcelo.schmitt1@...il.com>
Subject: [PATCH v2 0/3] iio: adc: Add AD4134 minimum I/O support

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.

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.

Change log v1 -> v2:
[Device tree]
- Dropped adi,control-mode property (can be inferred from the parent bus).
[IIO]
- Squashed the driver into a single file. Dropped unneeded code and simplified.
- Used IWYU to review includes (added missing ones, removed the unneeded).
- Reworked external clock setup.
- Dropped channel dynamic scan_types.
- Factored out register read specific code to into own function to make code more clear.
- Added comments to clarify non-intuitive code snippets.
- Added trailing commas where suggested.
- Made use of USEC_PER_SEC and HZ_PER_MHZ.
- Updated according to other suggestions (mostly code style).
[IIO Docs]
- Now using "~~~~~~~~" to mark fourth level topics.

Link to v1: https://lore.kernel.org/linux-iio/cover.1762777931.git.marcelo.schmitt@analog.com/

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          | 198 +++++++
 Documentation/iio/ad4134.rst                  |  58 +++
 Documentation/iio/index.rst                   |   1 +
 MAINTAINERS                                   |   9 +
 drivers/iio/adc/Kconfig                       |  11 +
 drivers/iio/adc/Makefile                      |   1 +
 drivers/iio/adc/ad4134.c                      | 493 ++++++++++++++++++
 7 files changed, 771 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.c


base-commit: f9e05791642810a0cf6237d39fafd6fec5e0b4bb
-- 
2.51.0