REGULATOR_LINEAR_RANGE(MT6311_MIN_UV, 0, 0x7f, MT6311_STEP_UV),
 };
 
-static struct regulator_ops mt6311_buck_ops = {
+static const struct regulator_ops mt6311_buck_ops = {
        .list_voltage = regulator_list_voltage_linear_range,
        .map_voltage = regulator_map_voltage_linear_range,
        .set_voltage_sel = regulator_set_voltage_sel_regmap,
        .is_enabled = regulator_is_enabled_regmap,
 };
 
-static struct regulator_ops mt6311_ldo_ops = {
+static const struct regulator_ops mt6311_ldo_ops = {
        .enable = regulator_enable_regmap,
        .disable = regulator_disable_regmap,
        .is_enabled = regulator_is_enabled_regmap,
        .enable_mask = MT6311_PMIC_RG_VBIASN_EN_MASK,\
 }
 
-static struct regulator_desc mt6311_regulators[] = {
+static const struct regulator_desc mt6311_regulators[] = {
        MT6311_BUCK(VDVFS),
        MT6311_LDO(VBIASN),
 };
        struct regulator_config config = { };
        struct regulator_dev *rdev;
        struct regmap *regmap;
-       int error, i, ret;
+       int i, ret;
        unsigned int data;
 
        regmap = devm_regmap_init_i2c(i2c, &mt6311_regmap_config);
        if (IS_ERR(regmap)) {
-               error = PTR_ERR(regmap);
+               ret = PTR_ERR(regmap);
                dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
-                       error);
-               return error;
+                       ret);
+               return ret;
        }
 
        ret = regmap_read(regmap, MT6311_SWCID, &data);