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| author | Pali Rohár <pali.rohar@gmail.com> | 2013-02-02 11:06:09 +0100 |
|---|---|---|
| committer | Anton Vorontsov <anton@enomsg.org> | 2013-02-02 19:44:08 -0800 |
| commit | 5dc3443eb0d9d3688a6e5a3b4ebb9000d81ff6ba (patch) | |
| tree | 44c9c77971b5f1ff7bd29e981ec76193118bfc37 /drivers/power | |
| parent | 60a1c4d41b3af91366bcb2a52b30b2050a48273e (diff) | |
| download | linux-5dc3443eb0d9d3688a6e5a3b4ebb9000d81ff6ba.tar.gz | |
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')
| -rw-r--r-- | drivers/power/bq27x00_battery.c | 10 |
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); |