staging: hikey9xx: hi6421v600-regulator: use some regmap helpers

Now that the driver was ported to use regmap, let's use
some help functions in order to simplify the code a little
bit.
Suggested-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/5bdd7988fb9bf5d3ebee03724cf73cc04d9bc47b.1611949675.git.mchehab+huawei@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/hikey9xx/hi6421v600-regulator.c

@@ -95,17 +95,6 @@ static const unsigned int ldo34_voltages[] = {
 		.eco_uA			= ecoamp,			       \
 	}
 
-static int hi6421_spmi_regulator_is_enabled(struct regulator_dev *rdev)
-{
-	struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
-	struct hi6421_spmi_pmic *pmic = sreg->pmic;
-	u32 reg_val;
-
-	regmap_read(pmic->map, rdev->desc->enable_reg, &reg_val);
-
-	return ((reg_val & rdev->desc->enable_mask) != 0);
-}
-
 static int hi6421_spmi_regulator_enable(struct regulator_dev *rdev)
 {
 	struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
@@ -136,34 +125,6 @@ static int hi6421_spmi_regulator_disable(struct regulator_dev *rdev)
 				  rdev->desc->enable_mask, 0);
 }
 
-static int hi6421_spmi_regulator_get_voltage_sel(struct regulator_dev *rdev)
-{
-	struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
-	struct hi6421_spmi_pmic *pmic = sreg->pmic;
-	u32 reg_val;
-
-	regmap_read(pmic->map, rdev->desc->vsel_reg, &reg_val);
-
-	return (reg_val & rdev->desc->vsel_mask) >> (ffs(rdev->desc->vsel_mask) - 1);
-}
-
-static int hi6421_spmi_regulator_set_voltage_sel(struct regulator_dev *rdev,
-						 unsigned int selector)
-{
-	struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
-	struct hi6421_spmi_pmic *pmic = sreg->pmic;
-	u32 reg_val;
-
-	if (selector >= rdev->desc->n_voltages)
-		return -EINVAL;
-
-	reg_val = selector << (ffs(rdev->desc->vsel_mask) - 1);
-
-	/* set voltage selector */
-	return regmap_update_bits(pmic->map, rdev->desc->vsel_reg,
-				  rdev->desc->vsel_mask, reg_val);
-}
-
 static unsigned int hi6421_spmi_regulator_get_mode(struct regulator_dev *rdev)
 {
 	struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
@@ -214,13 +175,13 @@ hi6421_spmi_regulator_get_optimum_mode(struct regulator_dev *rdev,
 }
 
 static const struct regulator_ops hi6421_spmi_ldo_rops = {
-	.is_enabled = hi6421_spmi_regulator_is_enabled,
+	.is_enabled = regulator_is_enabled_regmap,
 	.enable = hi6421_spmi_regulator_enable,
 	.disable = hi6421_spmi_regulator_disable,
 	.list_voltage = regulator_list_voltage_table,
 	.map_voltage = regulator_map_voltage_iterate,
-	.get_voltage_sel = hi6421_spmi_regulator_get_voltage_sel,
-	.set_voltage_sel = hi6421_spmi_regulator_set_voltage_sel,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_mode = hi6421_spmi_regulator_get_mode,
 	.set_mode = hi6421_spmi_regulator_set_mode,
 	.get_optimum_mode = hi6421_spmi_regulator_get_optimum_mode,