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Code Issues Releases Wiki Activity

power: supply: cpcap-battery: Simplify coulomb counter calculation with div_s64

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We can simplify cpcap_battery_cc_raw_div() with div_s64.

Cc: Merlijn Wajer <merlijn@wizzup.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Tony Lindgren 2019-10-09 14:06:18 -07:00 committed by Sebastian Reichel
parent 458f5c8cda
commit c59b3bad6f
1 changed files with 5 additions and 18 deletions
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23
drivers/power/supply/cpcap-battery.c
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@ -33,8 +33,6 @@
#include <linux/iio/types.h>
#include <linux/mfd/motorola-cpcap.h>
#include <asm/div64.h>
/*
* Register bit defines for CPCAP_REG_BPEOL. Some of these seem to
* map to MC13783UG.pdf "Table 5-19. Register 13, Power Control 0"
@ -219,28 +217,17 @@ static int cpcap_battery_cc_raw_div(struct cpcap_battery_ddata *ddata,
s16 offset, u32 divider)
{
s64 acc;
u64 tmp;
int avg_current;
if (!divider)
return 0;
acc = accumulator;
acc = acc - ((s64)sample * offset);
acc -= (s64)sample * offset;
acc *= ddata->cc_lsb;
acc *= -1;
acc = div_s64(acc, divider);
if (acc >= 0)
tmp = acc;
else
tmp = acc * -1;
tmp = tmp * ddata->cc_lsb;
do_div(tmp, divider);
avg_current = tmp;
if (acc >= 0)
return -avg_current;
else
return avg_current;
return acc;
}
/* 3600000μAms = 1μAh */