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Add support for AD7191

From:  Alisa-Dariana Roman <alisadariana-AT-gmail.com>
To:  "Rob Herring (Arm)" <robh-AT-kernel.org>, Alisa-Dariana Roman <alisa.roman-AT-analog.com>, Jonathan Cameron <Jonathan.Cameron-AT-huawei.com>, Ramona Gradinariu <ramona.bolboaca13-AT-gmail.com>, David Lechner <dlechner-AT-baylibre.com>, linux-iio-AT-vger.kernel.org, devicetree-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, linux-doc-AT-vger.kernel.org
Subject:  [PATCH v4 0/3] Add support for AD7191
Date:  Mon, 03 Feb 2025 15:31:25 +0200
Message-ID:  <20250203133254.313106-1-alisa.roman@analog.com>
Cc:  Lars-Peter Clausen <lars-AT-metafoo.de>, Michael Hennerich <Michael.Hennerich-AT-analog.com>, Jonathan Cameron <jic23-AT-kernel.org>, Krzysztof Kozlowski <krzk+dt-AT-kernel.org>, Conor Dooley <conor+dt-AT-kernel.org>, Jonathan Corbet <corbet-AT-lwn.net>
Archive-link:  Article


Thank you all for your feedback! Here is the updated series of patches!

Kind regards,
Alisa-Dariana Roman.

---

v3: https://lore.kernel.org/all/20250129143054.225322-1-alisa...

v3 -> v4:
	- addressed all replies for v3
	- refactored the scale and sampling frequencies configurations to use 2
different arrays for gpio case vs pinstrap case

v2: https://lore.kernel.org/all/20250122132821.126600-1-alisa...

v2 -> v3:
	- correct binding title
	- remove clksel_state and clksel_gpio, assume the clksel pin is always
pinstrapped
	- rephrase clocks description accordingly
	- simplify binding constraints
	- specify in binding description that PDOWN must be connected to SPI's
controller's CS
	- add minItems for gpios in bindings
	- make scope explicit for mutex guard
	- remove spi irq check
	- add id_table to spi_driver struct
	- changed comments as suggested
	- use spi_message_init_with_transfers()
	- default returns an error in ad7191_set_mode()
	- replace hard-coded 2 with st->pga_gpios->ndescs
	- use gpiod_set_array_value_cansleep()
	- change .storagebits to 32
	- check return value for ad_sd_init()
	- change to adi,odr-value and adi,pga-value, which now accepts the value as
suggested
	- modify variables names and refactor the setup of odr and pga gpios,
indexes and available arrays into ad7191_config_setup(), since they are all
related
	- add ad7191.rst

v1: https://lore.kernel.org/all/20241221155926.81954-1-alisa....

v1 -> v2:
	- removed patch adding function in ad_sigma_delta.h/.c
	- added a function set_cs() for asserting/deasserting the cs
	- handle pinstrapping cases
	- refactored all clock handling
	- updated bindings: corrected and added new things
	- -> address of the channels is used in set_channel()
	- addressed all the other changes




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