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authorPali Rohár <pali.rohar@gmail.com>2013-02-02 11:06:09 +0100
committerAnton Vorontsov <anton@enomsg.org>2013-02-02 19:44:08 -0800
commit5dc3443eb0d9d3688a6e5a3b4ebb9000d81ff6ba (patch)
tree44c9c77971b5f1ff7bd29e981ec76193118bfc37 /drivers/power/bq27x00_battery.c
parent60a1c4d41b3af91366bcb2a52b30b2050a48273e (diff)
bq27x00_battery: Fix reporting battery temperature
Reported temperature can be also negative, so cache value in non negative Kelvin degree. Signed-off-by: Pali Rohár <pali.rohar@gmail.com> Signed-off-by: Anton Vorontsov <anton@enomsg.org>
Diffstat (limited to 'drivers/power/bq27x00_battery.c')
-rw-r--r--drivers/power/bq27x00_battery.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index 7087d0d6a087..8ccf5d7d0add 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -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);