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bq20z75: Fix time and temp units 

Corrected temperature and time to empty/full conversions.
Temperature is in 0.1°C, time is in seconds.

Corrected units in comment. "Convert to µWh."

Signed-off-by: Benson Leung <bleung@chromium.org>
Acked-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
This commit is contained in:
Benson Leung 2011-02-27 17:41:48 -08:00 committed by Anton Vorontsov
parent a7d9ace4eb
commit 909a78b320
1 changed files with 12 additions and 6 deletions
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18
drivers/power/bq20z75.c
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@ -318,12 +318,15 @@ static void bq20z75_unit_adjustment(struct i2c_client *client,
{
#define BASE_UNIT_CONVERSION 1000
#define BATTERY_MODE_CAP_MULT_WATT (10 * BASE_UNIT_CONVERSION)
#define TIME_UNIT_CONVERSION 600
#define TEMP_KELVIN_TO_CELCIUS 2731
#define TIME_UNIT_CONVERSION 60
#define TEMP_KELVIN_TO_CELSIUS 2731
switch (psp) {
case POWER_SUPPLY_PROP_ENERGY_NOW:
case POWER_SUPPLY_PROP_ENERGY_FULL:
case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
/* bq20z75 provides energy in units of 10mWh.
* Convert to µWh
*/
val->intval *= BATTERY_MODE_CAP_MULT_WATT;
break;
@ -337,14 +340,17 @@ static void bq20z75_unit_adjustment(struct i2c_client *client,
break;
case POWER_SUPPLY_PROP_TEMP:
/* bq20z75 provides battery tempreture in 0.1°K
* so convert it to 0.1°C */
val->intval -= TEMP_KELVIN_TO_CELCIUS;
val->intval *= 10;
/* bq20z75 provides battery temperature in 0.1K
* so convert it to 0.1°C
*/
val->intval -= TEMP_KELVIN_TO_CELSIUS;
break;
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
/* bq20z75 provides time to empty and time to full in minutes.
* Convert to seconds
*/
val->intval *= TIME_UNIT_CONVERSION;
break;