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regulator: max8998: Use uV in voltage_map_desc
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Integer division may truncate.
This happens when pdata->buckx_voltagex setting is not align with 1000 uV.
Thus use uV in voltage_map_desc, this ensures the selected voltage won't less
than pdata buckx_voltagex settings.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org
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Axel Lin authored and Mark Brown committed Jan 8, 2013
1 parent d1c3ed6 commit adf6178
Showing 1 changed file with 21 additions and 21 deletions.
42 changes: 21 additions & 21 deletions drivers/regulator/max8998.c
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Original file line number Diff line number Diff line change
Expand Up @@ -51,39 +51,39 @@ struct voltage_map_desc {
int step;
};

/* Voltage maps */
/* Voltage maps in uV*/
static const struct voltage_map_desc ldo23_voltage_map_desc = {
.min = 800, .step = 50, .max = 1300,
.min = 800000, .step = 50000, .max = 1300000,
};
static const struct voltage_map_desc ldo456711_voltage_map_desc = {
.min = 1600, .step = 100, .max = 3600,
.min = 1600000, .step = 100000, .max = 3600000,
};
static const struct voltage_map_desc ldo8_voltage_map_desc = {
.min = 3000, .step = 100, .max = 3600,
.min = 3000000, .step = 100000, .max = 3600000,
};
static const struct voltage_map_desc ldo9_voltage_map_desc = {
.min = 2800, .step = 100, .max = 3100,
.min = 2800000, .step = 100000, .max = 3100000,
};
static const struct voltage_map_desc ldo10_voltage_map_desc = {
.min = 950, .step = 50, .max = 1300,
.min = 95000, .step = 50000, .max = 1300000,
};
static const struct voltage_map_desc ldo1213_voltage_map_desc = {
.min = 800, .step = 100, .max = 3300,
.min = 800000, .step = 100000, .max = 3300000,
};
static const struct voltage_map_desc ldo1415_voltage_map_desc = {
.min = 1200, .step = 100, .max = 3300,
.min = 1200000, .step = 100000, .max = 3300000,
};
static const struct voltage_map_desc ldo1617_voltage_map_desc = {
.min = 1600, .step = 100, .max = 3600,
.min = 1600000, .step = 100000, .max = 3600000,
};
static const struct voltage_map_desc buck12_voltage_map_desc = {
.min = 750, .step = 25, .max = 1525,
.min = 750000, .step = 25000, .max = 1525000,
};
static const struct voltage_map_desc buck3_voltage_map_desc = {
.min = 1600, .step = 100, .max = 3600,
.min = 1600000, .step = 100000, .max = 3600000,
};
static const struct voltage_map_desc buck4_voltage_map_desc = {
.min = 800, .step = 100, .max = 2300,
.min = 800000, .step = 100000, .max = 2300000,
};

static const struct voltage_map_desc *ldo_voltage_map[] = {
Expand Down Expand Up @@ -445,7 +445,7 @@ static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev,
if (max8998->iodev->type == TYPE_MAX8998 && !(val & MAX8998_ENRAMP))
return 0;

difference = (new_selector - old_selector) * desc->step;
difference = (new_selector - old_selector) * desc->step / 1000;
if (difference > 0)
return difference / ((val & 0x0f) + 1);

Expand Down Expand Up @@ -702,7 +702,7 @@ static int max8998_pmic_probe(struct platform_device *pdev)
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck1_voltage1 / 1000))
< pdata->buck1_voltage1)
i++;
max8998->buck1_vol[0] = i;
ret = max8998_write_reg(i2c, MAX8998_REG_BUCK1_VOLTAGE1, i);
Expand All @@ -713,7 +713,7 @@ static int max8998_pmic_probe(struct platform_device *pdev)
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck1_voltage2 / 1000))
< pdata->buck1_voltage2)
i++;

max8998->buck1_vol[1] = i;
Expand All @@ -725,7 +725,7 @@ static int max8998_pmic_probe(struct platform_device *pdev)
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck1_voltage3 / 1000))
< pdata->buck1_voltage3)
i++;

max8998->buck1_vol[2] = i;
Expand All @@ -737,7 +737,7 @@ static int max8998_pmic_probe(struct platform_device *pdev)
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck1_voltage4 / 1000))
< pdata->buck1_voltage4)
i++;

max8998->buck1_vol[3] = i;
Expand All @@ -763,7 +763,7 @@ static int max8998_pmic_probe(struct platform_device *pdev)
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck2_voltage1 / 1000))
< pdata->buck2_voltage1)
i++;
max8998->buck2_vol[0] = i;
ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE1, i);
Expand All @@ -774,7 +774,7 @@ static int max8998_pmic_probe(struct platform_device *pdev)
i = 0;
while (buck12_voltage_map_desc.min +
buck12_voltage_map_desc.step*i
< (pdata->buck2_voltage2 / 1000))
< pdata->buck2_voltage2)
i++;
max8998->buck2_vol[1] = i;
ret = max8998_write_reg(i2c, MAX8998_REG_BUCK2_VOLTAGE2, i);
Expand All @@ -792,8 +792,8 @@ static int max8998_pmic_probe(struct platform_device *pdev)
int count = (desc->max - desc->min) / desc->step + 1;

regulators[index].n_voltages = count;
regulators[index].min_uV = desc->min * 1000;
regulators[index].uV_step = desc->step * 1000;
regulators[index].min_uV = desc->min;
regulators[index].uV_step = desc->step;
}

config.dev = max8998->dev;
Expand Down

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