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bq27x00_battery: Fix reporting battery temperature

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Reported temperature can be also negative, so cache value in non negative
Kelvin degree.

Signed-off-by: Pali Rohár <[email protected]>
Signed-off-by: Anton Vorontsov <[email protected]>
This commit is contained in:
Pali Rohár 2013-02-02 11:06:09 +01:00 • committed by Anton Vorontsov
commit 5dc3443eb0
1 changed files with 5 additions and 5 deletions
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10
drivers/power/bq27x00_battery.c
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@ -299,7 +299,7 @@ static int bq27x00_battery_read_energy(struct bq27x00_device_info *di)
}
/*
* Return the battery temperature in tenths of degree Celsius
* Return the battery temperature in tenths of degree Kelvin
* Or < 0 if something fails.
*/
static int bq27x00_battery_read_temperature(struct bq27x00_device_info *di)
@ -312,10 +312,8 @@ static int bq27x00_battery_read_temperature(struct bq27x00_device_info *di)
return temp;
}
if (bq27xxx_is_chip_version_higher(di))
temp -= 2731;
else
temp = ((temp * 5) - 5463) / 2;
if (!bq27xxx_is_chip_version_higher(di))
temp = 5 * temp / 2;
return temp;
}
@ -641,6 +639,8 @@ static int bq27x00_battery_get_property(struct power_supply *psy,
break;
case POWER_SUPPLY_PROP_TEMP:
ret = bq27x00_simple_value(di->cache.temperature, val);
if (ret == 0)
val->intval -= 2731;
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
ret = bq27x00_simple_value(di->cache.time_to_empty, val);