regulator: add driver for tps6524x regulator

TPS6524X provides three step-down converters and two general-purpose LDO
voltage regulators.  This device is interfaced using SPI.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index dd30e883d4..da34981 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -250,5 +250,15 @@
 	help
 	  This driver supports TPS6586X voltage regulator chips.
 
+config REGULATOR_TPS6524X
+	tristate "TI TPS6524X Power regulators"
+	depends on SPI
+	help
+	  This driver supports TPS6524X voltage regulator chips. TPS6524X
+	  provides three step-down converters and two general-purpose LDO
+	  voltage regulators.  This device is interfaced using a customized
+	  serial interface currently supported on the sequencer serial
+	  port controller.
+
 endif