linux-kernel - [PATCH V3 1/4] pwm: tegra: Use DIV_ROUND_CLOSEST

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Message-ID: <1491557642-15940-2-git-send-email-ldewangan@nvidia.com>
Date:   Fri, 7 Apr 2017 15:03:59 +0530
From:   Laxman Dewangan <ldewangan@...dia.com>
To:     <thierry.reding@...il.com>, <robh+dt@...nel.org>,
        <jonathanh@...dia.com>
CC:     <mark.rutland@....com>, <linux-pwm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Laxman Dewangan <ldewangan@...dia.com>
Subject: [PATCH V3 1/4] pwm: tegra: Use DIV_ROUND_CLOSEST_ULL() instead of local implementation

Use macro DIV_ROUND_CLOSEST_ULL() for 64bit division to closest one
instead of implementing the same locally. This increase readability.

Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>

---
Changes from v1:
- None

Changes from V2:
- Fix typo in commit message.
---
 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