staging: hikey9xx: hi6421v600-regulator: cleanup comments

Remove obvious comments and fix the comment for the
HI6421V600_LDO() macro.

While on it, use kernel-doc notation for HI6421V600_LDO(),
as kernel-doc can check if the arguments match its
description.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/d5e6dbdee5f7e143300249251ddbe09fdf64e669.1611212783.git.mchehab+huawei@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/hikey9xx/hi6421v600-regulator.c

@@ -57,17 +57,17 @@ static const unsigned int ldo34_voltages[] = {
 	3000000, 3100000, 3200000, 3300000
 };
 
-/*
- * _id - LDO id name string
- * _match - of match name string
- * v_table - voltage table
- * vreg - voltage select register
- * vmask - voltage select mask
- * ereg - enable register
- * emask - enable mask
- * odelay - off/on delay time in uS
- * ecomask - eco mode mask
- * ecoamp - eco mode load uppler limit in uA
+/**
+ * HI6421V600_LDO() - specify a LDO power line
+ * @_id: LDO id name string
+ * @vtable: voltage table
+ * @ereg: enable register
+ * @emask: enable mask
+ * @vreg: voltage select register
+ * @odelay: off/on delay time in uS
+ * @etime: enable time in uS
+ * @ecomask: eco mode mask
+ * @ecoamp: eco mode load uppler limit in uA
  */
 #define HI6421V600_LDO(_id, vtable, ereg, emask, vreg,			       \
 		       odelay, etime, ecomask, ecoamp)			       \
@@ -114,7 +114,6 @@ static int hi6421_spmi_regulator_enable(struct regulator_dev *rdev)
 	/* cannot enable more than one regulator at one time */
 	mutex_lock(&sreg->enable_mutex);
 
-	/* set enable register */
 	ret = hi6421_spmi_pmic_rmw(pmic, rdev->desc->enable_reg,
 				   rdev->desc->enable_mask,
 				   rdev->desc->enable_mask);
@@ -132,7 +131,6 @@ static int hi6421_spmi_regulator_disable(struct regulator_dev *rdev)
 	struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
 	struct hi6421_spmi_pmic *pmic = sreg->pmic;
 
-	/* set enable register to 0 */
 	return hi6421_spmi_pmic_rmw(pmic, rdev->desc->enable_reg,
 				    rdev->desc->enable_mask, 0);
 }
@@ -143,7 +141,6 @@ static int hi6421_spmi_regulator_get_voltage_sel(struct regulator_dev *rdev)
 	struct hi6421_spmi_pmic *pmic = sreg->pmic;
 	u32 reg_val;
 
-	/* get voltage selector */
 	reg_val = hi6421_spmi_pmic_read(pmic, rdev->desc->vsel_reg);
 
 	return (reg_val & rdev->desc->vsel_mask) >> (ffs(rdev->desc->vsel_mask) - 1);
@@ -198,7 +195,6 @@ static int hi6421_spmi_regulator_set_mode(struct regulator_dev *rdev,
 		return -EINVAL;
 	}
 
-	/* set mode */
 	return hi6421_spmi_pmic_rmw(pmic, rdev->desc->enable_reg,
 				    sreg->eco_mode_mask, val);
 }
@@ -304,7 +300,6 @@ static int hi6421_spmi_regulator_probe(struct platform_device *pdev)
 	mutex_init(&sreg->enable_mutex);
 
 	for (i = 0; i < ARRAY_SIZE(regulator_info); i++) {
-		/* assign per-regulator data */
 		info = &regulator_info[i];
 
 		config.dev = pdev->dev.parent;