regulator: da903x: Convert da9034 ldo12 to use linear ranges

The voltage table of da9034 LDO12 is:
1700000, 1750000, 1800000, 1850000, 1900000, 1950000, 2000000, 2050000
2700000, 2750000, 2800000, 2850000, 2900000, 2950000, 3000000, 3050000

The voltage table is composed of two linear ranges:
for selector 0 ... 7:
        volt = 1700000 + 50000 * selector
for selector: 8 ... 15:
        volt = 2700000 + 50000 * (selector - 8)

This patch converts da9034 LDO12 to use newly introduced helpers for multiple
linear ranges.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/drivers/regulator/da903x.c b/drivers/regulator/da903x.c
index 2afa573..1378a24 100644 (file)
--- a/drivers/regulator/da903x.c
+++ b/drivers/regulator/da903x.c
@@ -252,39 +252,12 @@ static int da9034_set_dvc_voltage_sel(struct regulator_dev *rdev,
        return ret;
 }
 
-static int da9034_map_ldo12_voltage(struct regulator_dev *rdev,
-                                   int min_uV, int max_uV)
-{
-       struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
-       int sel;
-
-       if (check_range(info, min_uV, max_uV)) {
-               pr_err("invalid voltage range (%d, %d) uV\n", min_uV, max_uV);
-               return -EINVAL;
-       }
-
-       sel = DIV_ROUND_UP(min_uV - info->desc.min_uV, info->desc.uV_step);
-       sel = (sel >= 20) ? sel - 12 : ((sel > 7) ? 8 : sel);
-
-       return sel;
-}
-
-static int da9034_list_ldo12_voltage(struct regulator_dev *rdev,
-                                    unsigned selector)
-{
-       struct da903x_regulator_info *info = rdev_get_drvdata(rdev);
-       int volt;
-
-       if (selector >= 8)
-               volt = 2700000 + rdev->desc->uV_step * (selector - 8);
-       else
-               volt = rdev->desc->min_uV + rdev->desc->uV_step * selector;
-
-       if (volt > info->max_uV)
-               return -EINVAL;
-
-       return volt;
-}
+static const struct regulator_linear_range da9034_ldo12_ranges[] = {
+       { .min_uV = 1700000, .max_uV = 2050000, .min_sel =  0, .max_sel = 7,
+         .uV_step =  50000 },
+       { .min_uV = 2700000, .max_uV = 3050000, .min_sel =  8, .max_sel = 15,
+         .uV_step =  50000 },
+};
 
 static struct regulator_ops da903x_regulator_ldo_ops = {
        .set_voltage_sel = da903x_set_voltage_sel,
@@ -332,8 +305,8 @@ static struct regulator_ops da9034_regulator_dvc_ops = {
 static struct regulator_ops da9034_regulator_ldo12_ops = {
        .set_voltage_sel = da903x_set_voltage_sel,
        .get_voltage_sel = da903x_get_voltage_sel,
-       .list_voltage   = da9034_list_ldo12_voltage,
-       .map_voltage    = da9034_map_ldo12_voltage,
+       .list_voltage   = regulator_list_voltage_linear_range,
+       .map_voltage    = regulator_map_voltage_linear_range,
        .enable         = da903x_enable,
        .disable        = da903x_disable,
        .is_enabled     = da903x_is_enabled,
@@ -476,6 +449,8 @@ static int da903x_regulator_probe(struct platform_device *pdev)
        if (ri->desc.id == DA9034_ID_LDO12) {
                ri->desc.ops = &da9034_regulator_ldo12_ops;
                ri->desc.n_voltages = 16;
+               ri->desc.linear_ranges = da9034_ldo12_ranges;
+               ri->desc.n_linear_ranges = ARRAY_SIZE(da9034_ldo12_ranges);
        }
 
        if (ri->desc.id == DA9030_ID_LDO14)