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path: root/drivers/pwm/pwm-bcm2835.c
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Diffstat (limited to 'drivers/pwm/pwm-bcm2835.c')
-rw-r--r--drivers/pwm/pwm-bcm2835.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/pwm/pwm-bcm2835.c b/drivers/pwm/pwm-bcm2835.c
index 5652f461d994..f6fe0b922e1e 100644
--- a/drivers/pwm/pwm-bcm2835.c
+++ b/drivers/pwm/pwm-bcm2835.c
@@ -70,7 +70,7 @@ static int bcm2835_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
return -EINVAL;
}
- scaler = NSEC_PER_SEC / rate;
+ scaler = DIV_ROUND_CLOSEST(NSEC_PER_SEC, rate);
if (period_ns <= MIN_PERIOD) {
dev_err(pc->dev, "period %d not supported, minimum %d\n",
@@ -78,8 +78,10 @@ static int bcm2835_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
return -EINVAL;
}
- writel(duty_ns / scaler, pc->base + DUTY(pwm->hwpwm));
- writel(period_ns / scaler, pc->base + PERIOD(pwm->hwpwm));
+ writel(DIV_ROUND_CLOSEST(duty_ns, scaler),
+ pc->base + DUTY(pwm->hwpwm));
+ writel(DIV_ROUND_CLOSEST(period_ns, scaler),
+ pc->base + PERIOD(pwm->hwpwm));
return 0;
}