regulator: Versatile Express regulator driver

Implementation of the regulator framework driver for the
Versatile Express voltage control. Devices without
voltage constraints (ie. "regulator-[min|max]-microvolt"
properties in the DT node) are treated as fixed (or rather
read-only) regulators.

Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 67d47b59..b44b019 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -422,6 +422,13 @@
 	  This driver supports the voltage regulators provided by
 	  this family of companion chips.
 
+config REGULATOR_VEXPRESS
+	tristate "Versatile Express regulators"
+	depends on VEXPRESS_CONFIG
+	help
+	  This driver provides support for voltage regulators available
+	  on the ARM Ltd's Versatile Express platform.
+
 config REGULATOR_WM831X
 	tristate "Wolfson Microelectronics WM831x PMIC regulators"
 	depends on MFD_WM831X