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authorRyo Kodama <ryo.kodama.vz@renesas.com>2015-11-08 19:42:25 -0500
committerThierry Reding <thierry.reding@gmail.com>2015-12-16 11:02:14 -0500
commit72c16a9f98afad073b4a9c947c1c89bfb886ffcb (patch)
treec506bf3b4970c77e0b24e3651f25f597254fdd80 /drivers/pwm
parentd6dbdf0ddefa581e49c2abe5fb0eb17d14111d89 (diff)
pwm: rcar: Improve accuracy of frequency division setting
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>
Diffstat (limited to 'drivers/pwm')
-rw-r--r--drivers/pwm/pwm-rcar.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pwm/pwm-rcar.c b/drivers/pwm/pwm-rcar.c
index 6e99a63ffa29..7b8ac0678137 100644
--- a/drivers/pwm/pwm-rcar.c
+++ b/drivers/pwm/pwm-rcar.c
@@ -81,7 +81,7 @@ static int rcar_pwm_get_clock_division(struct rcar_pwm_chip *rp, int period_ns)
81 max = (unsigned long long)NSEC_PER_SEC * RCAR_PWM_MAX_CYCLE * 81 max = (unsigned long long)NSEC_PER_SEC * RCAR_PWM_MAX_CYCLE *
82 (1 << div); 82 (1 << div);
83 do_div(max, clk_rate); 83 do_div(max, clk_rate);
84 if (period_ns < max) 84 if (period_ns <= max)
85 break; 85 break;
86 } 86 }
87 87