linux-kernel - [PATCH v3 00/10] add support for Software mode on AD7606's iio backend driver

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Message-Id: <20250129-wip-bl-ad7606_add_backend_sw_mode-v3-0-c3aec77c0ab7@baylibre.com>
Date: Wed, 29 Jan 2025 12:03:01 +0100
From: Angelo Dureghello <adureghello@...libre.com>
To: Michael Hennerich <michael.hennerich@...log.com>, 
 Lars-Peter Clausen <lars@...afoo.de>, Jonathan Cameron <jic23@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Alexandru Ardelean <aardelean@...libre.com>, 
 David Lechner <dlechner@...libre.com>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
 linux-fbdev@...r.kernel.org, linux-iio@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Guillaume Stols <gstols@...libre.com>, 
 Angelo Dureghello <adureghello@...libre.com>
Subject: [PATCH v3 00/10] add support for Software mode on AD7606's iio
 backend driver

The previous series added iio_backend mode, but the configuration for this
mode was only possible through GPIOs (Hardware mode). Here, we add support
for configuring the chip using its registers (Software mode).

The bus access is based on Angelo's ad3552 implementation, that is we have
a particular compatible for the backend (here axi-adc) version supporting
the ad7606's register writing, and the ad7606 is defined as a child node
of the backend in the devicetree. Small changes are added to make the code
a bit more straightforward to understand, and more compact.

Signed-off-by: Guillaume Stols <gstols@...libre.com>
Co-developed-by: Angelo Dureghello <adureghello@...libre.com>
Signed-off-by: Angelo Dureghello <adureghello@...libre.com>
---
Changes in v2:
- Improved descriptions.
- dt-bindings: improved descriptions, added exemple and additional
  property for the custom IP.
- Reworked some macro commits to avoid changing order and associated
  diff artifacts.
- Various cleanups and formatting fixes.
- Link to v1: https://lore.kernel.org/r/20241121-ad7606_add_iio_backend_software_mode-v1-0-8a693a5e3fa9@baylibre.com

Changes in v3:
- add some fixes found while testing,
- general commit meessages fixes,
- codying style fixes,
- dt-bindings: add some properties as requirted,
- use iio_device_claim_direct_mode (and release),
- rename bus read/write functions with "bus" as done for ad3552r.

---
Angelo Dureghello (2):
      dt-bindings: iio: dac: adi-axi-adc: fix ad7606 pwm-names
      iio: adc: ad7606: fix wrong scale available

Guillaume Stols (8):
      dt-bindings: iio: dac: adi-axi-adc: add ad7606 variant
      iio: adc: ad7606: move the software mode configuration
      iio: adc: ad7606: move software functions into common file
      iio: adc: adi-axi-adc: add platform children support
      iio: adc: adi-axi-adc: add support for AD7606 register writing
      iio: adc: ad7606: change r/w_register signature
      iio: adc: ad7606: change channel macros parameters
      iio: adc: ad7606: add support for writing registers when using backend

 .../devicetree/bindings/iio/adc/adi,ad7606.yaml    |   1 +
 .../devicetree/bindings/iio/adc/adi,axi-adc.yaml   |  70 +++++++-
 drivers/iio/adc/ad7606.c                           | 152 ++++++++++++++---
 drivers/iio/adc/ad7606.h                           | 111 +++++++++----
 drivers/iio/adc/ad7606_bus_iface.h                 |  16 ++
 drivers/iio/adc/ad7606_par.c                       |  69 +++++++-
 drivers/iio/adc/ad7606_spi.c                       | 145 +---------------
 drivers/iio/adc/adi-axi-adc.c                      | 184 ++++++++++++++++++++-
 8 files changed, 541 insertions(+), 207 deletions(-)
---
base-commit: ae62b72e76b72f98a4955580cb1a46095fda7d8e
change-id: 20250129-wip-bl-ad7606_add_backend_sw_mode-dd22a50663f3

Best regards,
-- 
Angelo Dureghello <adureghello@...libre.com>