From: Axel Lin <axel.lin@ingics.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Thomas Abraham <thomas.abraham@linaro.org>,
Kyungmin Park <kyungmin.park@samsung.com>,
MyungJoo Ham <myungjoo.ham@samsung.com>,
Liam Girdwood <lrg@ti.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH v2] regulator: max8998: Ensure enough delay time for max8998_set_voltage_buck_time_sel
Date: Wed, 09 Jan 2013 19:34:57 +0800 [thread overview]
Message-ID: <1357731297.5239.1.camel@phoenix> (raw)
Use DIV_ROUND_UP to prevent truncation by integer division issue.
This ensures we return enough delay time.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
---
v2: Only fix integer division truncation issue, remove other optimization.
drivers/regulator/max8998.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/regulator/max8998.c b/drivers/regulator/max8998.c
index 06be8cc..1f0df40 100644
--- a/drivers/regulator/max8998.c
+++ b/drivers/regulator/max8998.c
@@ -447,7 +447,7 @@ static int max8998_set_voltage_buck_time_sel(struct regulator_dev *rdev,
difference = (new_selector - old_selector) * desc->step / 1000;
if (difference > 0)
- return difference / ((val & 0x0f) + 1);
+ return DIV_ROUND_UP(difference, (val & 0x0f) + 1);
return 0;
}
--
1.7.9.5
next reply other threads:[~2013-01-09 11:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-09 11:34 Axel Lin [this message]
2013-01-10 12:56 ` [PATCH v2] regulator: max8998: Ensure enough delay time for max8998_set_voltage_buck_time_sel Mark Brown
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