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| author | Axel Lin <axel.lin@gmail.com> | 2012-07-04 11:55:07 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-07-04 12:39:38 +0100 |
| commit | 9c6a74c5e0ca3bfac09cb1e7bf7629cc0f3aa48c (patch) | |
| tree | c5c1d04ce47081ca27aaf1dac9d2a50532bb7bf5 /drivers/regulator/ad5398.c | |
| parent | fca53d862dcbddaa9db017b70a64392da8c20bce (diff) | |
| download | linux-9c6a74c5e0ca3bfac09cb1e7bf7629cc0f3aa48c.tar.gz linux-9c6a74c5e0ca3bfac09cb1e7bf7629cc0f3aa48c.tar.bz2 linux-9c6a74c5e0ca3bfac09cb1e7bf7629cc0f3aa48c.zip | |
regulator: ad5398: Fix min/max current limit boundary checking
It is ok to request current limit with min_uA < chip->min_uA and
max_uA > chip->max_uA.
We need to set min_uA = chip->min_uA if (min_uA < chip->min_uA),
this ensures the equation to calcuate selator does not return negative number.
Also set max_uA = chip->max_uA if (max_uA > chip->max_uA), as suggested by
Sonic.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator/ad5398.c')
| -rw-r--r-- | drivers/regulator/ad5398.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/regulator/ad5398.c b/drivers/regulator/ad5398.c index 46d05f38baf8..f123f7e3b752 100644 --- a/drivers/regulator/ad5398.c +++ b/drivers/regulator/ad5398.c @@ -89,9 +89,12 @@ static int ad5398_set_current_limit(struct regulator_dev *rdev, int min_uA, int unsigned short data; int ret; - if (min_uA > chip->max_uA || min_uA < chip->min_uA) - return -EINVAL; - if (max_uA > chip->max_uA || max_uA < chip->min_uA) + if (min_uA < chip->min_uA) + min_uA = chip->min_uA; + if (max_uA > chip->max_uA) + max_uA = chip->max_uA; + + if (min_uA > chip->max_uA || max_uA < chip->min_uA) return -EINVAL; selector = DIV_ROUND_UP((min_uA - chip->min_uA) * chip->current_level, |