Messages in this thread Patch in this message | | | From | Laxman Dewangan <> | Subject | [PATCH 1/5] regulator: pwm: Fix calculation of voltage-to-duty cycle | Date | Tue, 8 Mar 2016 16:23:21 +0530 |
| |
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> Cc: Lee Jones <lee.jones@linaro.org> --- drivers/regulator/pwm-regulator.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c index 3aca067..4d8eb35 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) -- 2.1.4
| |