iio: dac: ad5686: add support for missing power supplies

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Get and enable regulators for vdd, vlogic and vref input power pins. Vdd
is the input power supply, while vlogic powers the digital side. vref is
replacing vcc, which is being deprecated, but still supported. The value
of vref_mv is checked so that a device without internal voltage reference
cannot proceed without an explicit supply. For correct operation, vdd and
vlogic are required, then devm_regulator_get_enable() is used so the
driver can still work without them by using the stub/dummy regulators.
Error report uses dev_err_probe(), which helps debugging an init issue.
A small delay is added after the regulators are enabled to consider for
the power-up time (4.5 us).

Signed-off-by: Rodrigo Alencar <rodrigo.alencar@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

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Rodrigo Alencar 2026-06-28 15:08:12 +01:00 • committed by Jonathan Cameron

parent 692d2294c2

commit 4dd5a69dbe

1 changed files with 20 additions and 2 deletions

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drivers/iio/dac/ad5686.c

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