On Mon, Mar 11, 2019 at 11:46:28AM +0800, Hsin-Hsiung Wang wrote:

+static const u32 vefuse_voltages[] = {
+	1700000, 1800000, 1900000,
+};

This and a bunch of the other regulators look like they're just linear
ranges and could use the linear range helpers.

+static const u32 vcn33_bt_voltages[] = {
+	3300000, 3400000, 3500000,
+};
+
+static const u32 vcn33_wifi_voltages[] = {
+	3300000, 3400000, 3500000,
+};

These also have the same range so no matter which helpers are used I'd
expect the data to be shared, I think some of the other regulators might
have shared tables but didn't confirm.

+static inline unsigned int mt6358_map_mode(unsigned int mode)
+{
+	return mode == MT6358_BUCK_MODE_FORCE_PWM ?
+		REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;
+}

Please write normal if statements, it makes the code more readable.

+static int mt6358_set_voltage_sel(struct regulator_dev *rdev,
+				  unsigned int selector)
+{
+	int idx, ret;
+	const u32 *pvol;
+	struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
+
+	pvol = (const u32 *)info->index_table;
+
+	idx = pvol[selector];
+	ret = regmap_update_bits(rdev->regmap, info->desc.vsel_reg,
+				 info->desc.vsel_mask,
+				 idx << info->vsel_shift);
+
+	return ret;
+}

This looks like something other devices might do - rather than implement
it in the driver it would be a bit better to add it to helpers.c as a
reusable function.

+static int mt6358_get_buck_voltage_sel(struct regulator_dev *rdev)
+{
+	int ret, regval;
+	struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
+
+	ret = regmap_read(rdev->regmap, info->da_vsel_reg, &regval);
+	if (ret != 0) {
+		dev_info(&rdev->dev,
+			 "Failed to get mt6358 Buck %s vsel reg: %d\n",
+			 info->desc.name, ret);
+		return ret;
+	}
+
+	ret = (regval >> info->da_vsel_shift) & info->da_vsel_mask;
+
+	return ret;
+}

This is just the generic get_voltage_sel() as far as I can see?

+	/* Read PMIC chip revision to update constraints and voltage table */
+	if (regmap_read(mt6397->regmap, MT6358_SWCID, &reg_value) < 0) {
+		dev_err(&pdev->dev, "Failed to read Chip ID\n");
+		return -EIO;
+	}

We never use the value we read here?