diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/ds2760_battery.c | 41 |
1 files changed, 27 insertions, 14 deletions
diff --git a/drivers/power/ds2760_battery.c b/drivers/power/ds2760_battery.c index 2d0e5edb474..f4a9258aa9d 100644 --- a/drivers/power/ds2760_battery.c +++ b/drivers/power/ds2760_battery.c @@ -70,6 +70,10 @@ static unsigned int rated_capacity; module_param(rated_capacity, uint, 0644); MODULE_PARM_DESC(rated_capacity, "rated battery capacity, 10*mAh or index"); +static unsigned int current_accum; +module_param(current_accum, uint, 0644); +MODULE_PARM_DESC(current_accum, "current accumulator value"); + /* Some batteries have their rated capacity stored a N * 10 mAh, while * others use an index into this table. */ static int rated_capacities[] = { @@ -215,6 +219,22 @@ static int ds2760_battery_read_status(struct ds2760_device_info *di) return 0; } +static void ds2760_battery_set_current_accum(struct ds2760_device_info *di, + unsigned int acr_val) +{ + unsigned char acr[2]; + + /* acr is in units of 0.25 mAh */ + acr_val *= 4L; + acr_val /= 1000; + + acr[0] = acr_val >> 8; + acr[1] = acr_val & 0xff; + + if (w1_ds2760_write(di->w1_dev, acr, DS2760_CURRENT_ACCUM_MSB, 2) < 2) + dev_warn(di->dev, "ACR write failed\n"); +} + static void ds2760_battery_update_status(struct ds2760_device_info *di) { int old_charge_status = di->charge_status; @@ -246,21 +266,9 @@ static void ds2760_battery_update_status(struct ds2760_device_info *di) if (di->full_counter < 2) { di->charge_status = POWER_SUPPLY_STATUS_CHARGING; } else { - unsigned char acr[2]; - int acr_val; - - /* acr is in units of 0.25 mAh */ - acr_val = di->full_active_uAh * 4L / 1000; - - acr[0] = acr_val >> 8; - acr[1] = acr_val & 0xff; - - if (w1_ds2760_write(di->w1_dev, acr, - DS2760_CURRENT_ACCUM_MSB, 2) < 2) - dev_warn(di->dev, - "ACR reset failed\n"); - di->charge_status = POWER_SUPPLY_STATUS_FULL; + ds2760_battery_set_current_accum(di, + di->full_active_uAh); } } } else { @@ -423,6 +431,11 @@ static int ds2760_battery_probe(struct platform_device *pdev) if (rated_capacity) ds2760_battery_write_rated_capacity(di, rated_capacity); + /* set current accumulator if given as parameter. + * this should only be done for bootstrapping the value */ + if (current_accum) + ds2760_battery_set_current_accum(di, current_accum); + retval = power_supply_register(&pdev->dev, &di->bat); if (retval) { dev_err(di->dev, "failed to register battery\n"); |