1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/pwm/pwm-tegra.c b/drivers/pwm/pwm-tegra.c
index 0a688dabd670..21518bea00c6 100644
--- a/drivers/pwm/pwm-tegra.c
+++ b/drivers/pwm/pwm-tegra.c
@@ -76,6 +76,7 @@ static int tegra_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
         struct tegra_pwm_chip *pc = to_tegra_pwm_chip(chip);
         unsigned long long c = duty_ns;
         unsigned long rate, hz;
+        unsigned long long ns100 = NSEC_PER_SEC;
         u32 val = 0;
         int err;
 
@@ -94,9 +95,11 @@ static int tegra_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
          * cycles at the PWM clock rate will take period_ns nanoseconds.
          */
         rate = clk_get_rate(pc->clk) >> PWM_DUTY_WIDTH;
-        hz = NSEC_PER_SEC / period_ns;
 
-        rate = (rate + (hz / 2)) / hz;
+        /* Consider precision in PWM_SCALE_WIDTH rate calculation */
+        ns100 *= 100;
+        hz = DIV_ROUND_CLOSEST_ULL(ns100, period_ns);
+        rate = DIV_ROUND_CLOSEST(rate * 100, hz);
 
         /*
          * Since the actual PWM divider is the register's frequency divider