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authorLaxman Dewangan <ldewangan@nvidia.com>2016-03-08 11:53:21 +0100
committerMark Brown <broonie@kernel.org>2016-03-12 07:07:09 +0100
commit1aaab34878ac14efede3f0e737b99447745699d1 (patch)
tree3bfb7728506b912b19b84c5d5c4d4bfa5445dd3f /drivers/regulator
parentLinux 4.5-rc1 (diff)
downloadlinux-1aaab34878ac14efede3f0e737b99447745699d1.tar.xz
linux-1aaab34878ac14efede3f0e737b99447745699d1.zip
regulator: pwm: Fix calculation of voltage-to-duty cycle
With following equation for calculating voltage_to_duty_cycle_percentage 100 - (((req_uV * 100) - (min_uV * 100)) / diff); we get 0% for max_uV and 100% for min_uV. Correcting this to ((req_uV * 100) - (min_uV * 100)) / diff; to get proper duty cycle. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
-rw-r--r--drivers/regulator/pwm-regulator.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c
index 3aca067b9901..4d8eb3506dc8 100644
--- a/drivers/regulator/pwm-regulator.c
+++ b/drivers/regulator/pwm-regulator.c
@@ -115,7 +115,7 @@ static int pwm_voltage_to_duty_cycle_percentage(struct regulator_dev *rdev, int
int max_uV = rdev->constraints->max_uV;
int diff = max_uV - min_uV;
- return 100 - (((req_uV * 100) - (min_uV * 100)) / diff);
+ return ((req_uV * 100) - (min_uV * 100)) / diff;
}
static int pwm_regulator_get_voltage(struct regulator_dev *rdev)