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power: supply: sc27xx: prevent adc * 1000 from overflow

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The input parameter is int type, cause adc * 1000 could overflow.
Change to use s64 to avoid this issue.

Signed-off-by: Chen Yongzhi <yongzhi.chen@unisoc.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Chunyan Zhang 2020-07-24 20:21:48 +08:00 committed by Sebastian Reichel
parent af60459a54
commit ac31585fca
1 changed files with 5 additions and 4 deletions
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9
drivers/power/supply/sc27xx_fuel_gauge.c
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@ -5,6 +5,7 @@
#include <linux/iio/consumer.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/math64.h>
#include <linux/module.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
@ -133,14 +134,14 @@ static const char * const sc27xx_charger_supply_name[] = {
"sc2723_charger",
};
static int sc27xx_fgu_adc_to_current(struct sc27xx_fgu_data *data, int adc)
static int sc27xx_fgu_adc_to_current(struct sc27xx_fgu_data *data, s64 adc)
{
return DIV_ROUND_CLOSEST(adc * 1000, data->cur_1000ma_adc);
return DIV_S64_ROUND_CLOSEST(adc * 1000, data->cur_1000ma_adc);
}
static int sc27xx_fgu_adc_to_voltage(struct sc27xx_fgu_data *data, int adc)
static int sc27xx_fgu_adc_to_voltage(struct sc27xx_fgu_data *data, s64 adc)
{
return DIV_ROUND_CLOSEST(adc * 1000, data->vol_1000mv_adc);
return DIV_S64_ROUND_CLOSEST(adc * 1000, data->vol_1000mv_adc);
}
static int sc27xx_fgu_voltage_to_adc(struct sc27xx_fgu_data *data, int vol)