power: regulator: stpmu1: Introduce stpmu1 driver

Enable support for the regulator functions of the STPMU1X PMIC. The
driver implements get/set api for the various BUCKS and LDOs supported
by the PMIC device. This driver is controlled by a device tree node
which includes voltage limits.

Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 5b4ac10..822cff6 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -204,3 +204,12 @@
 	The TPS65910 PMIC provides 4 SMPSs and 8 LDOs. This driver supports all
 	regulator types of the TPS65910 (BUCK, BOOST and LDO). It implements
 	the get/set api for value and enable.
+
+config DM_REGULATOR_STPMU1
+	bool "Enable driver for STPMU1 regulators"
+	depends on DM_REGULATOR && PMIC_STPMU1
+	---help---
+	Enable support for the regulator functions of the STPMU1 PMIC. The
+	driver implements get/set api for the various BUCKS and LDOs supported
+	by the PMIC device. This driver is controlled by a device tree node
+	which includes voltage limits.