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This driver handles most voltage regulators found in X-Powers AXP PMICs. It is based on, and intended to replace, the regulator driver in TF-A. AXP PMIC regulators can be divided into 6 categories: - Switches without voltage control => fully supported. - Single linear range => fully supported. - Two linear ranges, "step" and "2 * step" => fully supported. - Two linear ranges, "step" and "5 * step" => only the first range is supported. No boards are known to use the second range. - Non-linear voltage values => fully supported. - LDOs shared with GPIO pins => not supported. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com>