linux-kernel - [PATCH RFC 0/5] iio: adc: ad4030: new driver for AD4030 and similar ADCs

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Message-Id: <20240627-eblanc-ad4630_v1-v1-0-fdc0610c23b0@baylibre.com>
Date: Thu, 27 Jun 2024 13:59:11 +0200
From: Esteban Blanc <eblanc@...libre.com>
To: baylibre-upstreaming@...ups.io, Lars-Peter Clausen <lars@...afoo.de>, 
 Michael Hennerich <Michael.Hennerich@...log.com>, 
 Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Nuno Sa <nuno.sa@...log.com>
Cc: Michael Hennerich <michael.hennerich@...log.com>, 
 linux-iio@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, David Lechner <dlechner@...libre.com>, 
 Esteban Blanc <eblanc@...libre.com>
Subject: [PATCH RFC 0/5] iio: adc: ad4030: new driver for AD4030 and
 similar ADCs

This is adding DT bindings and a new driver for AD4030, AD4630 and
AD4632 ADCs.

This work is being done in collaboration with Analog Devices Inc.,
hence they are listed as maintainers rather than me.

The code has been tested on a Zedboard with an EVAL-AD4030-24FMCZ,
an EVAL-AD4630-24FMCZ and an EVAL-AD4630-16FMCZ. As there is no eval
board for AD4632 the support can't be tested at the moment. The main
difference is the reduced throughput.

This series is taged as RFC because I think I'm misusing
IIO_CHAN_INFO_CALIB*. For CALIBBIAS the doc in sysfs-bus-iio says
"Hardware applied calibration offset (assumed to fix production
inaccuracies)" but AD4030 offset in on 24bits and I would argue that at
this point it's not just here to fix production inaccuracies. Same this
for CALIBSCALE. What IIO attributes should I use instead?

Signed-off-by: Esteban Blanc <eblanc@...libre.com>
---
Esteban Blanc (5):
      dt-bindings: iio: adc: add ADI ad4030 and ad4630
      iio: adc: ad4030: add driver for ad4030-24
      iio: adc: ad4030: add averaging support
      iio: adc: ad4030: add support for ad4630-24 and ad4630-16
      iio: adc: ad4030: add support for ad4632-16 and ad4632-24

 .../devicetree/bindings/iio/adc/adi,ad4030.yaml    |  113 ++
 MAINTAINERS                                        |    9 +
 drivers/iio/adc/Kconfig                            |   13 +
 drivers/iio/adc/Makefile                           |    1 +
 drivers/iio/adc/ad4030.c                           | 1081 ++++++++++++++++++++
 5 files changed, 1217 insertions(+)
---
base-commit: 07d4d0bb4a8ddcc463ed599b22f510d5926c2495
change-id: 20240624-eblanc-ad4630_v1-1a074097eb91

Best regards,
-- 
Esteban Blanc <eblanc@...libre.com>