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| author | Axel Lin <axel.lin@gmail.com> | 2012-06-08 14:35:32 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-17 21:01:21 +0100 |
| commit | e08ef739feec5341fe9382a9f5173ddd56c95f93 (patch) | |
| tree | 5ef9ae1964e26561d6f5d98baa85f02a03514318 /drivers/regulator/tps62360-regulator.c | |
| parent | c70ad9dcf08c839b018d8c440bd8c19aabbb08a8 (diff) | |
| download | linux-0-day-e08ef739feec5341fe9382a9f5173ddd56c95f93.tar.gz linux-0-day-e08ef739feec5341fe9382a9f5173ddd56c95f93.tar.xz | |
regulator: tps62360: Simplify tps62360_set_voltage_time_sel implementation
For linear mappings, we can use below equation to get the voltage difference
between new_selector and old_selector:
abs(new_selector - old_selector) * rdev->desc->uV_step
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator/tps62360-regulator.c')
| -rw-r--r-- | drivers/regulator/tps62360-regulator.c | 13 |
1 files changed, 3 insertions, 10 deletions
diff --git a/drivers/regulator/tps62360-regulator.c b/drivers/regulator/tps62360-regulator.c index e534269ed44aa..d044a58640e7d 100644 --- a/drivers/regulator/tps62360-regulator.c +++ b/drivers/regulator/tps62360-regulator.c @@ -179,17 +179,10 @@ static int tps62360_set_voltage_time_sel(struct regulator_dev *rdev, unsigned int old_selector, unsigned int new_selector) { struct tps62360_chip *tps = rdev_get_drvdata(rdev); - int old_uV, new_uV; - old_uV = regulator_list_voltage_linear(rdev, old_selector); - if (old_uV < 0) - return old_uV; - - new_uV = regulator_list_voltage_linear(rdev, new_selector); - if (new_uV < 0) - return new_uV; - - return DIV_ROUND_UP(abs(old_uV - new_uV), tps->change_uv_per_us); + return DIV_ROUND_UP(abs(new_selector - old_selector) * + rdev->desc->uV_step, + tps->change_uv_per_us); } static int tps62360_set_mode(struct regulator_dev *rdev, unsigned int mode) |