regulator: tps6594-regulator: Add driver for TI TPS6594 regulators

This patch adds support for TPS6594 regulators (bucks and LDOs).
The output voltages are configurable and are meant to supply power
to the main processor and other components.
Bucks can be used in single or multiphase mode, depending on PMIC
part number.
Signed-off-by: Jerome Neanne <jneanne@baylibre.com>
Signed-off-by: Esteban Blanc <eblanc@baylibre.com>
Link: https://lore.kernel.org/r/20230522163115.2592883-4-eblanc@baylibre.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/Kconfig

@@ -1463,6 +1463,19 @@ config REGULATOR_TPS65219
 	  voltage regulators. It supports software based voltage control
 	  for different voltage domains.
 
+config REGULATOR_TPS6594
+	tristate "TI TPS6594 Power regulators"
+	depends on MFD_TPS6594 && OF
+	default MFD_TPS6594
+	help
+	  This driver supports TPS6594 voltage regulator chips.
+	  TPS6594 series of PMICs have 5 BUCKs and 4 LDOs
+	  voltage regulators.
+	  BUCKs 1,2,3,4 can be used in single phase or multiphase mode.
+	  Part number defines which single or multiphase mode is i used.
+	  It supports software based voltage control
+	  for different voltage domains.
+
 config REGULATOR_TPS6524X
 	tristate "TI TPS6524X Power regulators"
 	depends on SPI

drivers/regulator/Makefile

@@ -174,6 +174,7 @@ obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6586X) += tps6586x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65912) += tps65912-regulator.o
+obj-$(CONFIG_REGULATOR_TPS6594) += tps6594-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65132) += tps65132-regulator.o
 obj-$(CONFIG_REGULATOR_TPS68470) += tps68470-regulator.o
 obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o twl6030-regulator.o