From: Axel Lin <axel.lin@ingics.com>
Date: Fri, 30 Nov 2012 05:19:33 +0000 (+0800)
Subject: regulator: wm831x-dcdc: Ensure selected voltage falls within requested range
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1a679930e1750c342d7e5fac787dc47484daec2e;p=openwrt%2Fstaging%2Fblogic.git

regulator: wm831x-dcdc: Ensure selected voltage falls within requested range

Use DIV_ROUND_UP to ensure selected voltage won't less than min_uV due to
integer truncation.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

diff --git a/drivers/regulator/wm831x-dcdc.c b/drivers/regulator/wm831x-dcdc.c
index 782c228a19bd..411cb12385aa 100644
--- a/drivers/regulator/wm831x-dcdc.c
+++ b/drivers/regulator/wm831x-dcdc.c
@@ -223,7 +223,7 @@ static int wm831x_buckv_map_voltage(struct regulator_dev *rdev,
 	if (min_uV < 600000)
 		vsel = 0;
 	else if (min_uV <= 1800000)
-		vsel = ((min_uV - 600000) / 12500) + 8;
+		vsel = DIV_ROUND_UP(min_uV - 600000, 12500) + 8;
 	else
 		return -EINVAL;