regulator: DA9055 regulator driver

This is the Regulator patch for the DA9055 PMIC and has got dependency on
the DA9055 MFD core.

This patch support all of the DA9055 regulators. The output voltages are
fully programmable through I2C interface only. The platform data with regulation
constraints is passed down from the board to the regulator.

This patch is functionaly tested on SMDK6410 board. DA9055 Evaluation board
was connected to the SMDK6410 board.
Signed-off-by: David Dajun Chen <dchen@diasemi.com>
Signed-off-by: Ashish Jangam <ashish.jangam@kpitcummins.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/Kconfig

@@ -109,6 +109,16 @@ config REGULATOR_DA9052
 	  This driver supports the voltage regulators of DA9052-BC and
 	  DA9053-AA/Bx PMIC.
 
+config REGULATOR_DA9055
+	tristate "Dialog Semiconductor DA9055 regulators"
+	depends on MFD_DA9055
+	help
+	  Say y here to support the BUCKs and LDOs regulators found on
+	  Dialog Semiconductor DA9055 PMIC.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called da9055-regulator.
+
 config REGULATOR_FAN53555
 	tristate "Fairchild FAN53555 Regulator"
 	depends on I2C

drivers/regulator/Makefile

@@ -18,6 +18,7 @@ obj-$(CONFIG_REGULATOR_ANATOP) += anatop-regulator.o
 obj-$(CONFIG_REGULATOR_ARIZONA) += arizona-micsupp.o arizona-ldo1.o
 obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o
 obj-$(CONFIG_REGULATOR_DA9052)	+= da9052-regulator.o
+obj-$(CONFIG_REGULATOR_DA9055)	+= da9055-regulator.o
 obj-$(CONFIG_REGULATOR_DBX500_PRCMU) += dbx500-prcmu.o
 obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
 obj-$(CONFIG_REGULATOR_FAN53555) += fan53555.o

include/linux/mfd/da9055/pdata.h

@@ -25,8 +25,29 @@ struct da9055_pdata {
 	int gpio_base;
 
 	struct regulator_init_data *regulators[DA9055_MAX_REGULATORS];
-	bool reset_enable;		/* Enable RTC in RESET Mode */
-	enum gpio_select *gpio_rsel;	/* Select regulator set thru GPIO 1/2 */
-	enum gpio_select *gpio_ren;	/* Enable regulator thru GPIO 1/2 */
+	/* Enable RTC in RESET Mode */
+	bool reset_enable;
+	/*
+	 * GPI muxed pin to control
+	 * regulator state A/B, 0 if not available.
+	 */
+	int *gpio_ren;
+	/*
+	 * GPI muxed pin to control
+	 * regulator set, 0 if not available.
+	 */
+	int *gpio_rsel;
+	/*
+	 * Regulator mode control bits value (GPI offset) that
+	 * that controls the regulator state, 0 if not available.
+	 */
+	enum gpio_select *reg_ren;
+	/*
+	 * Regulator mode control bits value (GPI offset) that
+	 * controls the regulator set A/B, 0 if  not available.
+	 */
+	enum gpio_select *reg_rsel;
+	/* GPIOs to enable regulator, 0 if not available */
+	int *ena_gpio;
 };
 #endif /* __DA9055_PDATA_H */