From: Laxman Dewangan <ldewangan@nvidia.com>
To: <thierry.reding@gmail.com>, <robh+dt@kernel.org>, <jonathanh@nvidia.com>
Cc: <mark.rutland@arm.com>, <linux-pwm@vger.kernel.org>,
<devicetree@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
Laxman Dewangan <ldewangan@nvidia.com>
Subject: [PATCH V2 1/4] pwm: tegra: Use DIV_ROUND_CLOSEST_ULL() instead of local implementation
Date: Thu, 6 Apr 2017 19:50:58 +0530 [thread overview]
Message-ID: <1491488461-24621-2-git-send-email-ldewangan@nvidia.com> (raw)
In-Reply-To: <1491488461-24621-1-git-send-email-ldewangan@nvidia.com>
Use macro DIV_ROUND_CLOSEST_ULL() for 64bit division to closet one
instead of implementing the same locally. This increase readability.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
---
Changes from V1:
None
drivers/pwm/pwm-tegra.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/pwm/pwm-tegra.c b/drivers/pwm/pwm-tegra.c
index e464784..0a688da 100644
--- a/drivers/pwm/pwm-tegra.c
+++ b/drivers/pwm/pwm-tegra.c
@@ -85,8 +85,7 @@ static int tegra_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
* nearest integer during division.
*/
c *= (1 << PWM_DUTY_WIDTH);
- c += period_ns / 2;
- do_div(c, period_ns);
+ c = DIV_ROUND_CLOSEST_ULL(c, period_ns);
val = (u32)c << PWM_DUTY_SHIFT;
--
2.1.4
next prev parent reply other threads:[~2017-04-06 14:40 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-06 14:20 [PATCH V2 0/4] pwm: tegra: Pin configuration in suspend/resume and cleanups Laxman Dewangan
2017-04-06 14:20 ` Laxman Dewangan [this message]
2017-04-06 16:28 ` [PATCH V2 1/4] pwm: tegra: Use DIV_ROUND_CLOSEST_ULL() instead of local implementation Thierry Reding
2017-04-06 14:20 ` [PATCH V2 2/4] pwm: tegra: Increase precision in pwm rate calculation Laxman Dewangan
2017-04-06 16:24 ` Thierry Reding
2017-04-06 16:28 ` Thierry Reding
2017-04-06 14:21 ` [PATCH V3 3/4] pwm: tegra: Add DT binding details to configure pin in suspends/resume Laxman Dewangan
2017-04-06 15:26 ` Jon Hunter
2017-04-06 16:48 ` Laxman Dewangan
2017-04-07 7:49 ` Jon Hunter
2017-04-06 14:21 ` [PATCH V4 4/4] pwm: tegra: Add support to configure pin state " Laxman Dewangan
2017-04-06 15:17 ` Jon Hunter
2017-04-06 16:40 ` Laxman Dewangan
2017-04-07 7:51 ` Jon Hunter
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