regulator: mt6363: Fix VEMC voltage selection

VEMC encodes its voltage as a range and a trim value. The custom
getter looks up the range with

	if (rdesc->linear_range_selectors_bitfield[range] != calsel)

so it stops at the first non-matching range and the reported voltage is
wrong for every range setting. With hardware trap 1, the custom getter
and setter apply MT6363_RG_VEMC_VOSEL_1_MASK, the trap 1 range field,
to the trap 0 trim register and keep the trap 0 range field. Voltage
changes are then not applied and the reported voltage does not reflect
the trap 1 settings.

Apart from the trap handling, both callbacks reimplement the regulator
core pickable regmap helpers, which work for VEMC once the descriptor
holds the range field and trim register of the hardware trap. Select
that field and register at probe and use the helpers instead of
fixing the copies. Keep the setter as a wrapper for the TMA unlock
and relock around the write, which the helper does not do. A trap
value other than 0 or 1, or a failed trap read, now fails the probe
instead of the VEMC voltage get and set.

Fixes: 3c36965df808 ("regulator: Add support for MediaTek MT6363 SPMI PMIC Regulators")
Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
Link: https://patch.msgid.link/20261102-rgp-67-mt6363-regulator-fixes-v1-2-420789a3113e@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>

0 files changed, 0 insertions, 0 deletions