regulator: anatop: Use linear_min_sel with linear mapping

By setting linear_min_sel to anatop_reg->min_bit_val, we can avoid
adjust the anatop_reg->min_bit_val offset in [set|get]_voltage_sel.

With this chance we can refactor this driver to use
regulator_[get|set]_voltage_sel_regmap.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Ying-Chun Liu <paulliu@debian.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/regulator/anatop-regulator.c b/drivers/regulator/anatop-regulator.c
index 1af9768..b78b622 100644 (file)
--- a/drivers/regulator/anatop-regulator.c
+++ b/drivers/regulator/anatop-regulator.c
@@ -48,18 +48,16 @@ static int anatop_regmap_set_voltage_sel(struct regulator_dev *reg,
                                        unsigned selector)
 {
        struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg);
-       u32 val, mask;
+       u32 mask;
 
        if (!anatop_reg->control_reg)
                return -ENOTSUPP;
 
-       val = anatop_reg->min_bit_val + selector;
-       dev_dbg(&reg->dev, "%s: calculated val %d\n", __func__, val);
        mask = ((1 << anatop_reg->vol_bit_width) - 1) <<
                anatop_reg->vol_bit_shift;
-       val <<= anatop_reg->vol_bit_shift;
+       selector <<= anatop_reg->vol_bit_shift;
        regmap_update_bits(anatop_reg->anatop, anatop_reg->control_reg,
-                               mask, val);
+                               mask, selector);
 
        return 0;
 }
@@ -77,7 +75,7 @@ static int anatop_regmap_get_voltage_sel(struct regulator_dev *reg)
                anatop_reg->vol_bit_shift;
        val = (val & mask) >> anatop_reg->vol_bit_shift;
 
-       return val - anatop_reg->min_bit_val;
+       return val;
 }
 
 static struct regulator_ops anatop_rops = {
@@ -158,10 +156,11 @@ static int __devinit anatop_regulator_probe(struct platform_device *pdev)
                goto anatop_probe_end;
        }
 
-       rdesc->n_voltages = (sreg->max_voltage - sreg->min_voltage)
-               / 25000 + 1;
+       rdesc->n_voltages = (sreg->max_voltage - sreg->min_voltage) / 25000 + 1
+                           + sreg->min_bit_val;
        rdesc->min_uV = sreg->min_voltage;
        rdesc->uV_step = 25000;
+       rdesc->linear_min_sel = sreg->min_bit_val;
 
        config.dev = &pdev->dev;
        config.init_data = initdata;