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Add a driver for the regulators found on all types of the MediaTek MT6316 SPMI PMIC, fully controlled by SPMI interface and featuring four step down DCDC (buck) converters. In particular, this includes support for: - MT6316(BP/VP): 2+2 Phase (Phase 1: buck1+2, Phase 2: buck3+4) - MT6316(CP/HP/KP): 3+1 Phase (Phase 1: buck1+2+4, Phase 2: buck3) - MT6316(DP/TP): 4+0 Phase (Single phase, buck1+2+3+4) Please note that the set/clear registers for the enable bits are not documented in the datasheet version that I used as reference, but those are used in the downstream driver and I verified that are actually working as expected. Besides, it's also worth clearly mentioning that the MT6316 PMICs voltage selector register uses a weird 9-bits Big Endian format, for which a driver-private helper is provided. Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://patch.msgid.link/20251027110527.21002-3-angelogioacchino.delregno@collabora.com Signed-off-by: Mark Brown <broonie@kernel.org>
Linux kernel
============
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