pwm: rcar: Improve accuracy of frequency division setting
authorRyo Kodama <ryo.kodama.vz@renesas.com>
Mon, 9 Nov 2015 00:42:25 +0000 (09:42 +0900)
committerThierry Reding <thierry.reding@gmail.com>
Wed, 16 Dec 2015 16:02:14 +0000 (17:02 +0100)
From: Ryo Kodama <ryo.kodama.vz@renesas.com>

When period_ns is set to the same value of RCAR_PWM_MAX_CYCLE in
rcar_pwm_get_clock_division(), this function should allow such value
for improving accuracy of frequency division setting.

Signed-off-by: Ryo Kodama <ryo.kodama.vz@renesas.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
drivers/pwm/pwm-rcar.c

index 6e99a63..7b8ac06 100644 (file)
@@ -81,7 +81,7 @@ static int rcar_pwm_get_clock_division(struct rcar_pwm_chip *rp, int period_ns)
                max = (unsigned long long)NSEC_PER_SEC * RCAR_PWM_MAX_CYCLE *
                        (1 << div);
                do_div(max, clk_rate);
-               if (period_ns < max)
+               if (period_ns <= max)
                        break;
        }