diff options
| author | Rong Dian <b38775@freescale.com> | 2012-07-04 12:51:17 +0800 |
|---|---|---|
| committer | Terry Lv <r65388@freescale.com> | 2012-07-25 13:10:27 +0800 |
| commit | 6cf00108de4e6c354e82bc30ae7452684d2ba8ee (patch) | |
| tree | 3884bd0f4eb8d746c12b664a5d53525b61b5b97b /drivers/power | |
| parent | a23fda1bd3fa217651eca032e3ca3ca9dad0178f (diff) | |
ENGR00215718: battery: fix issure that coulomb data increases in discharger
Hardware cannot support battery internal resistance and coulomb calculation,
estimate data only by battery voltage.The true battery voltage will change to
a bit lower about 50mV~500mV than normal voltage with playing game or video or
other consumption actions, then change back to normal voltage with finishing
playing game or video or other consumption actions in the discharger stage.
Signed-off-by: Rong Dian <b38775@freescale.com>
Diffstat (limited to 'drivers/power')
| -rwxr-xr-x | drivers/power/sabresd_battery.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/power/sabresd_battery.c b/drivers/power/sabresd_battery.c index df9f62cdeb5d..460da4a43b72 100755 --- a/drivers/power/sabresd_battery.c +++ b/drivers/power/sabresd_battery.c @@ -249,8 +249,26 @@ u32 calibration_voltage(struct max8903_data *data) static void max8903_battery_update_status(struct max8903_data *data) { static int counter; + int temp; + static int temp_last; mutex_lock(&data->work_lock); - data->voltage_uV = calibration_voltage(data); + temp = calibration_voltage(data); + if (temp_last == 0) { + data->voltage_uV = temp; + temp_last = temp; + } + if (data->charger_online == 0 && temp_last != 0) { + if (temp < temp_last) { + temp_last = temp; + data->voltage_uV = temp; + } else { + data->voltage_uV = temp_last; + } + } + if (data->charger_online == 1) { + data->voltage_uV = temp; + temp_last = temp; + } data->percent = calibrate_battery_capability_percent(data); if (data->percent != data->old_percent) { data->old_percent = data->percent; |