From: Philip Rakity <prakity@marvell.com>
Date: Sat, 13 Aug 2011 04:19:57 +0000 (-0700)
Subject: max17042_battery: Do not lose accuracy calculating current_now
X-Git-Tag: firefly_0821_release~3680^2~3750^2~56
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=91d8b0d6f81d2946962ee559090a34834dfd467b;p=firefly-linux-kernel-4.4.55.git

max17042_battery: Do not lose accuracy calculating current_now

PROP_CURRENT_NOW value is first divided then multiplied up
causing a lose of accuracy.  Use the same method as
PROP_CURRENT_AVG to do the calculation.

Signed-off-by: Philip Rakity <prakity@marvell.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
---

diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c
index 462845025ca1..61fb6d7dfe7a 100644
--- a/drivers/power/max17042_battery.c
+++ b/drivers/power/max17042_battery.c
@@ -152,8 +152,7 @@ static int max17042_get_property(struct power_supply *psy,
 				val->intval++;
 				val->intval *= -1;
 			}
-			val->intval >>= 4;
-			val->intval *= 1000000 * 25 / chip->pdata->r_sns;
+			val->intval *= 1562500 / chip->pdata->r_sns;
 		} else {
 			return -EINVAL;
 		}