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regulator: core: Allow fixed voltage range in multiple linear ranges 

Current code does not allow fixed voltage range in multiple linear ranges.
If someone does set range->uV_step == 0 in one of the linear ranges, we hit
divided by zero bug. This patch fixes this issue.
For fixed voltage range, return any selector means the same voltage.
Thus just return 0.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Axel Lin 2013-07-18 22:21:57 +08:00 committed by Mark Brown
parent c36a1cdf96
commit a56d66a2f0
1 changed files with 9 additions and 3 deletions
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12
drivers/regulator/core.c
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@ -2436,9 +2436,15 @@ int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
if (min_uV <= range->min_uV)
min_uV = range->min_uV;
ret = DIV_ROUND_UP(min_uV - range->min_uV, range->uV_step);
if (ret < 0)
return ret;
/* range->uV_step == 0 means fixed voltage range */
if (range->uV_step == 0) {
ret = 0;
} else {
ret = DIV_ROUND_UP(min_uV - range->min_uV,
range->uV_step);
if (ret < 0)
return ret;
}
break;
}