regulator: max77686: Convert driver to use regulator_set_voltage_time_sel.

This patch converts the driver to use regulator_set_voltage_time_sel() as
.set_voltage_time_sel() callback. It also sets ramp_delay as 100000 uV/us for
LDOs & normal BUCKs and 27500 uV/us(default/reset value) for BUCKs[2/3/4] in
regulator_desc[].

Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

drivers/regulator/max77686.c

@@ -40,6 +40,8 @@
 #define MAX77686_LDO_LOW_UVSTEP	25000
 #define MAX77686_BUCK_MINUV	750000
 #define MAX77686_BUCK_UVSTEP	50000
+#define MAX77686_RAMP_DELAY	100000			/* uV/us */
+#define MAX77686_DVS_RAMP_DELAY	27500			/* uV/us */
 #define MAX77686_DVS_MINUV	600000
 #define MAX77686_DVS_UVSTEP	12500
 
@@ -66,28 +68,8 @@ struct max77686_data {
 	struct device *dev;
 	struct max77686_dev *iodev;
 	struct regulator_dev **rdev;
-	int ramp_delay; /* in mV/us */
 };
 
-static int max77686_set_dvs_voltage_time_sel(struct regulator_dev *rdev,
-			unsigned int old_selector, unsigned int new_selector)
-{
-	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
-	int ramp_rate[] = {13, 27, 55, 100};
-
-	return DIV_ROUND_UP(rdev->desc->uV_step *
-			    abs(new_selector - old_selector),
-			    ramp_rate[max77686->ramp_delay] * 1000);
-}
-
-static int max77686_set_voltage_time_sel(struct regulator_dev *rdev,
-			unsigned int old_selector, unsigned int new_selector)
-{
-	/* Unconditionally 100 mV/us */
-	return DIV_ROUND_UP(rdev->desc->uV_step *
-			    abs(new_selector - old_selector), 100 * 1000);
-}
-
 static struct regulator_ops max77686_ops = {
 	.list_voltage		= regulator_list_voltage_linear,
 	.map_voltage		= regulator_map_voltage_linear,
@@ -96,7 +78,7 @@ static struct regulator_ops max77686_ops = {
 	.disable		= regulator_disable_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
-	.set_voltage_time_sel	= max77686_set_voltage_time_sel,
+	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
 };
 
 static struct regulator_ops max77686_buck_dvs_ops = {
@@ -107,7 +89,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 	.disable		= regulator_disable_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
-	.set_voltage_time_sel	= max77686_set_dvs_voltage_time_sel,
+	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
 };
 
 #define regulator_desc_ldo(num)		{				\
@@ -118,6 +100,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 	.owner		= THIS_MODULE,					\
 	.min_uV		= MAX77686_LDO_MINUV,				\
 	.uV_step	= MAX77686_LDO_UVSTEP,				\
+	.ramp_delay	= MAX77686_RAMP_DELAY,				\
 	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
 	.vsel_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
 	.vsel_mask	= MAX77686_VSEL_MASK,				\
@@ -133,6 +116,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 	.owner		= THIS_MODULE,					\
 	.min_uV		= MAX77686_LDO_LOW_MINUV,			\
 	.uV_step	= MAX77686_LDO_LOW_UVSTEP,			\
+	.ramp_delay	= MAX77686_RAMP_DELAY,				\
 	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
 	.vsel_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
 	.vsel_mask	= MAX77686_VSEL_MASK,				\
@@ -148,6 +132,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 	.owner		= THIS_MODULE,					\
 	.min_uV		= MAX77686_BUCK_MINUV,				\
 	.uV_step	= MAX77686_BUCK_UVSTEP,				\
+	.ramp_delay	= MAX77686_RAMP_DELAY,				\
 	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
 	.vsel_reg	= MAX77686_REG_BUCK5OUT + (num - 5) * 2,	\
 	.vsel_mask	= MAX77686_VSEL_MASK,				\
@@ -162,6 +147,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 	.owner		= THIS_MODULE,					\
 	.min_uV		= MAX77686_BUCK_MINUV,				\
 	.uV_step	= MAX77686_BUCK_UVSTEP,				\
+	.ramp_delay	= MAX77686_RAMP_DELAY,				\
 	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
 	.vsel_reg	= MAX77686_REG_BUCK1OUT,			\
 	.vsel_mask	= MAX77686_VSEL_MASK,				\
@@ -176,6 +162,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 	.owner		= THIS_MODULE,					\
 	.min_uV		= MAX77686_DVS_MINUV,				\
 	.uV_step	= MAX77686_DVS_UVSTEP,				\
+	.ramp_delay	= MAX77686_DVS_RAMP_DELAY,			\
 	.n_voltages	= MAX77686_DVS_VSEL_MASK + 1,			\
 	.vsel_reg	= MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,	\
 	.vsel_mask	= MAX77686_DVS_VSEL_MASK,			\
@@ -255,17 +242,6 @@ static __devinit int max77686_pmic_probe(struct platform_device *pdev)
 	max77686->iodev = iodev;
 	platform_set_drvdata(pdev, max77686);
 
-	max77686->ramp_delay = RAMP_RATE_NO_CTRL; /* Set 0x3 for RAMP */
-	regmap_update_bits(max77686->iodev->regmap,
-			MAX77686_REG_BUCK2CTRL1, MAX77686_RAMP_RATE_MASK,
-			max77686->ramp_delay << 6);
-	regmap_update_bits(max77686->iodev->regmap,
-			MAX77686_REG_BUCK3CTRL1, MAX77686_RAMP_RATE_MASK,
-			max77686->ramp_delay << 6);
-	regmap_update_bits(max77686->iodev->regmap,
-			MAX77686_REG_BUCK4CTRL1, MAX77686_RAMP_RATE_MASK,
-			max77686->ramp_delay << 6);
-
 	for (i = 0; i < MAX77686_REGULATORS; i++) {
 		config.dev = max77686->dev;
 		config.regmap = iodev->regmap;