linux-kernel - [PATCH] regulator: Simplify the code to get selector in isl6271a_set

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Date:	Fri, 02 Mar 2012 09:19:02 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Marek Vasut <marek.vasut@...il.com>, Liam Girdwood <lrg@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: [PATCH] regulator: Simplify the code to get selector in
 isl6271a_set_voltage

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/regulator/isl6271a-regulator.c |   14 +++-----------
 1 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/regulator/isl6271a-regulator.c b/drivers/regulator/isl6271a-regulator.c
index c1a456c..775f5fd 100644
--- a/drivers/regulator/isl6271a-regulator.c
+++ b/drivers/regulator/isl6271a-regulator.c
@@ -63,23 +63,15 @@ static int isl6271a_set_voltage(struct regulator_dev *dev,
 				unsigned *selector)
 {
 	struct isl_pmic *pmic = rdev_get_drvdata(dev);
-	int vsel, err, data;
+	int err, data;
 
 	if (minuV < ISL6271A_VOLTAGE_MIN || minuV > ISL6271A_VOLTAGE_MAX)
 		return -EINVAL;
 	if (maxuV < ISL6271A_VOLTAGE_MIN || maxuV > ISL6271A_VOLTAGE_MAX)
 		return -EINVAL;
 
-	/* Align to 50000 mV */
-	vsel = minuV - (minuV % ISL6271A_VOLTAGE_STEP);
-
-	/* If the result fell out of [minuV,maxuV] range, put it back */
-	if (vsel < minuV)
-		vsel += ISL6271A_VOLTAGE_STEP;
-
-	/* Convert the microvolts to data for the chip */
-	data = (vsel - ISL6271A_VOLTAGE_MIN) / ISL6271A_VOLTAGE_STEP;
-
+	data = DIV_ROUND_UP(minuV - ISL6271A_VOLTAGE_MIN,
+			    ISL6271A_VOLTAGE_STEP);
 	*selector = data;
 
 	mutex_lock(&pmic->mtx);
-- 
1.7.5.4



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