Regulator: DA9052/53 regulator support v4

The Dialog PMIC has below featured regulators:- DA9052-BC - 4 DVS Buck converters 0.5V - 3.6V upto 1Amp. DA9053-AA/BX - 4 DVS Buck converters 0.5V - 2.5V upto 3Amp. DA9052/53 - 10 Programmable LDO's High PSSR, 1% accuracy.

This patch support all the DA9052 and Da9053 regulators. The output voltages are fully programmable via I2C or SPI interface. The platform data with regulation constraints is passed down from the board to the regulator.

---
Changes since v4
- Add support for DA9053-AA/Bx
- Correct the definition of macros DA9052_BUCK_ILIM_MASK
- Get current limit to return current limit in microA
- Correct the voltage selector value for the Buck-PERI above 3v
- Set the struct member regulator->da9052 in probe() Changes since v3
- Corrected verify_range function
Changes since v2
- Check for current min_uA < 700000
- Corrected current conversions from mA to uA

---
 drivers/regulator/Kconfig            |    7 +
 drivers/regulator/Makefile           |    1 +
 drivers/regulator/da9052-regulator.c |  594 ++++++++++++++++++++++++++++++++++
 3 files changed, 602 insertions(+), 0 deletions(-)
 create mode 100755 drivers/regulator/da9052-regulator.c

index c7fd2c0..74f6042 100644
@@ -167,6 +167,13 @@ config REGULATOR_DA903X
 	  Say y here to support the BUCKs and LDOs regulators found on
 	  Dialog Semiconductor DA9030/DA9034 PMIC.
 
+config REGULATOR_DA9052
+	tristate "Dialog DA9052/DA9053 regulators"
+	depends on PMIC_DA9052
+	help
+	  Say y here to support the BUCKs and LDOs regulators found on
+	  Dialog Semiconductor DA9052/DA9053 PMIC.
+
 config REGULATOR_PCF50633
 	tristate "PCF50633 regulator driver"
         depends on MFD_PCF50633

index 040d5aa..f02534e 100644
@@ -28,6 +28,7 @@ obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
 obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6586X) += tps6586x-regulator.o
 obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o
+obj-$(CONFIG_REGULATOR_DA9052)	+= da9052-regulator.o
 obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
 obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
 obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o