From: Lars-Peter Clausen <lars@metafoo.de>
Date: Mon, 24 May 2010 18:20:57 +0000 (+0200)
Subject: bq27x00: Improve temperature property precession
X-Git-Tag: v2.6.39-rc1~56^2~10^2~12
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=0e9f30497e88600ba52013665270f543bb94f0d8;p=~shefty%2Frdma-dev.git

bq27x00: Improve temperature property precession

This patch improves the precession of the temperature property of the
bq27x00 driver.
By dividing before multiplying the current code effectively cuts of the
last decimal digit. This patch fixes it by multiplying before dividing.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
---

diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index bb043f93cea..4f7465999c8 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -109,7 +109,7 @@ static int bq27x00_battery_temperature(struct bq27x00_device_info *di)
 	if (di->chip == BQ27500)
 		return temp - 2731;
 	else
-		return ((temp >> 2) - 273) * 10;
+		return ((temp * 5) - 5463) / 2;
 }
 
 /*