regulator: RK808: Add regulator driver for RK808

The regulator module consists of 4 DCDCs, 8 LDOs and 2 switches.
The output voltages are configurable and are meant to supply power
to the main processor and other components

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 2dc8289..fb32bab 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -459,6 +459,16 @@
 	  through regulator interface. The device supports multiple DCDC/LDO
 	  outputs which can be controlled by i2c communication.
 
+config REGULATOR_RK808
+	tristate "Rockchip RK808 Power regulators"
+	depends on MFD_RK808
+	help
+	  Select this option to enable the power regulator of ROCKCHIP
+	  PMIC RK808.
+	  This driver supports the control of different power rails of device
+	  through regulator interface. The device supports multiple DCDC/LDO
+	  outputs which can be controlled by i2c communication.
+
 config REGULATOR_S2MPA01
 	tristate "Samsung S2MPA01 voltage regulator"
 	depends on MFD_SEC_CORE