iio: dac: ds4424: convert to regmap

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Refactor the driver to use the regmap API.

Replace the driver-specific mutex and manual shadow buffers with the
standard regmap infrastructure for locking and caching.

This ensures the cache is populated from hardware at probe, preventing
state desynchronization (e.g. across suspend/resume).

Define access tables to validate the different register maps of DS44x2
and DS44x4.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Sander Vanheule <sander@svanheule.net>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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This commit is contained in:

Oleksij Rempel 2026-02-10 14:51:08 +01:00 • committed by Jonathan Cameron

parent 8d68801a69

commit cfeae3ce3e

2 changed files with 91 additions and 73 deletions

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1

drivers/iio/dac/Kconfig

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167

drivers/iio/dac/ds4424.c

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