linux-kernel - [PATCH] regulator: Ensure enough enable time for max8649

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Message-ID: <1312260896.6161.1.camel@phoenix>
Date:	Tue, 02 Aug 2011 12:54:56 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Haojian Zhuang <haojian.zhuang@...vell.com>,
	Liam Girdwood <lrg@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] regulator: Ensure enough enable time for max8649

Integer division may truncate the result, thus max8649_enable_time() may return
slightly shorter enable time. This patch fixes it.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/regulator/max8649.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/regulator/max8649.c b/drivers/regulator/max8649.c
index 30eb9e5..1062cf9 100644
--- a/drivers/regulator/max8649.c
+++ b/drivers/regulator/max8649.c
@@ -221,7 +221,7 @@ static int max8649_enable_time(struct regulator_dev *rdev)
 	ret = (ret & MAX8649_RAMP_MASK) >> 5;
 	rate = (32 * 1000) >> ret;	/* uV/uS */
 
-	return (voltage / rate);
+	return DIV_ROUND_UP(voltage, rate);
 }
 
 static int max8649_set_mode(struct regulator_dev *rdev, unsigned int mode)
-- 
1.7.4.1



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