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authorAxel Lin <axel.lin@gmail.com>2012-06-08 14:35:32 +0800
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-06-17 21:01:21 +0100
commite08ef739feec5341fe9382a9f5173ddd56c95f93 (patch)
tree5ef9ae1964e26561d6f5d98baa85f02a03514318 /drivers/regulator/tps62360-regulator.c
parentc70ad9dcf08c839b018d8c440bd8c19aabbb08a8 (diff)
downloadlinux-e08ef739feec5341fe9382a9f5173ddd56c95f93.tar.bz2
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.c13
1 files changed, 3 insertions, 10 deletions
diff --git a/drivers/regulator/tps62360-regulator.c b/drivers/regulator/tps62360-regulator.c
index e534269ed44a..d044a58640e7 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)