diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/apm_power.c | 141 |
1 files changed, 102 insertions, 39 deletions
diff --git a/drivers/power/apm_power.c b/drivers/power/apm_power.c index 39a90a6f0f80..bbf3ee10da04 100644 --- a/drivers/power/apm_power.c +++ b/drivers/power/apm_power.c @@ -26,65 +26,124 @@ static struct power_supply *main_battery; static void find_main_battery(void) { struct device *dev; - struct power_supply *bat, *batm; + struct power_supply *bat = NULL; + struct power_supply *max_charge_bat = NULL; + struct power_supply *max_energy_bat = NULL; union power_supply_propval full; int max_charge = 0; + int max_energy = 0; main_battery = NULL; - batm = NULL; + list_for_each_entry(dev, &power_supply_class->devices, node) { bat = dev_get_drvdata(dev); - /* If none of battery devices cantains 'use_for_apm' flag, - choice one with maximum design charge */ - if (!PSY_PROP(bat, CHARGE_FULL_DESIGN, &full)) { + + if (bat->use_for_apm) { + /* nice, we explicitly asked to report this battery. */ + main_battery = bat; + return; + } + + if (!PSY_PROP(bat, CHARGE_FULL_DESIGN, &full) || + !PSY_PROP(bat, CHARGE_FULL, &full)) { if (full.intval > max_charge) { - batm = bat; + max_charge_bat = bat; max_charge = full.intval; } + } else if (!PSY_PROP(bat, ENERGY_FULL_DESIGN, &full) || + !PSY_PROP(bat, ENERGY_FULL, &full)) { + if (full.intval > max_energy) { + max_energy_bat = bat; + max_energy = full.intval; + } } + } - if (bat->use_for_apm) - main_battery = bat; + if ((max_energy_bat && max_charge_bat) && + (max_energy_bat != max_charge_bat)) { + /* try guess battery with more capacity */ + if (!PSY_PROP(max_charge_bat, VOLTAGE_MAX_DESIGN, &full)) { + if (max_energy > max_charge * full.intval) + main_battery = max_energy_bat; + else + main_battery = max_charge_bat; + } else if (!PSY_PROP(max_energy_bat, VOLTAGE_MAX_DESIGN, + &full)) { + if (max_charge > max_energy / full.intval) + main_battery = max_charge_bat; + else + main_battery = max_energy_bat; + } else { + /* give up, choice any */ + main_battery = max_energy_bat; + } + } else if (max_charge_bat) { + main_battery = max_charge_bat; + } else if (max_energy_bat) { + main_battery = max_energy_bat; + } else { + /* give up, try the last if any */ + main_battery = bat; } - if (!main_battery) - main_battery = batm; } -static int calculate_time(int status) +static int calculate_time(int status, int using_charge) { - union power_supply_propval charge_full, charge_empty; - union power_supply_propval charge, I; + union power_supply_propval full; + union power_supply_propval empty; + union power_supply_propval cur; + union power_supply_propval I; + enum power_supply_property full_prop; + enum power_supply_property full_design_prop; + enum power_supply_property empty_prop; + enum power_supply_property empty_design_prop; + enum power_supply_property cur_avg_prop; + enum power_supply_property cur_now_prop; - if (MPSY_PROP(CHARGE_FULL, &charge_full)) { - /* if battery can't report this property, use design value */ - if (MPSY_PROP(CHARGE_FULL_DESIGN, &charge_full)) + if (MPSY_PROP(CURRENT_AVG, &I)) { + /* if battery can't report average value, use momentary */ + if (MPSY_PROP(CURRENT_NOW, &I)) return -1; } - if (MPSY_PROP(CHARGE_EMPTY, &charge_empty)) { - /* if battery can't report this property, use design value */ - if (MPSY_PROP(CHARGE_EMPTY_DESIGN, &charge_empty)) - charge_empty.intval = 0; + if (using_charge) { + full_prop = POWER_SUPPLY_PROP_CHARGE_FULL; + full_design_prop = POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN; + empty_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY; + empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY; + cur_avg_prop = POWER_SUPPLY_PROP_CHARGE_AVG; + cur_now_prop = POWER_SUPPLY_PROP_CHARGE_NOW; + } else { + full_prop = POWER_SUPPLY_PROP_ENERGY_FULL; + full_design_prop = POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN; + empty_prop = POWER_SUPPLY_PROP_ENERGY_EMPTY; + empty_design_prop = POWER_SUPPLY_PROP_CHARGE_EMPTY; + cur_avg_prop = POWER_SUPPLY_PROP_ENERGY_AVG; + cur_now_prop = POWER_SUPPLY_PROP_ENERGY_NOW; } - if (MPSY_PROP(CHARGE_AVG, &charge)) { - /* if battery can't report average value, use momentary */ - if (MPSY_PROP(CHARGE_NOW, &charge)) + if (_MPSY_PROP(full_prop, &full)) { + /* if battery can't report this property, use design value */ + if (_MPSY_PROP(full_design_prop, &full)) return -1; } - if (MPSY_PROP(CURRENT_AVG, &I)) { + if (_MPSY_PROP(empty_prop, &empty)) { + /* if battery can't report this property, use design value */ + if (_MPSY_PROP(empty_design_prop, &empty)) + empty.intval = 0; + } + + if (_MPSY_PROP(cur_avg_prop, &cur)) { /* if battery can't report average value, use momentary */ - if (MPSY_PROP(CURRENT_NOW, &I)) + if (_MPSY_PROP(cur_now_prop, &cur)) return -1; } if (status == POWER_SUPPLY_STATUS_CHARGING) - return ((charge.intval - charge_full.intval) * 60L) / - I.intval; + return ((cur.intval - full.intval) * 60L) / I.intval; else - return -((charge.intval - charge_empty.intval) * 60L) / - I.intval; + return -((cur.intval - empty.intval) * 60L) / I.intval; } static int calculate_capacity(int using_charge) @@ -200,18 +259,22 @@ static void apm_battery_apm_get_power_status(struct apm_power_info *info) info->units = APM_UNITS_MINS; if (status.intval == POWER_SUPPLY_STATUS_CHARGING) { - if (MPSY_PROP(TIME_TO_FULL_AVG, &time_to_full)) { - if (MPSY_PROP(TIME_TO_FULL_NOW, &time_to_full)) - info->time = calculate_time(status.intval); - else - info->time = time_to_full.intval / 60; + if (!MPSY_PROP(TIME_TO_FULL_AVG, &time_to_full) || + !MPSY_PROP(TIME_TO_FULL_NOW, &time_to_full)) { + info->time = time_to_full.intval / 60; + } else { + info->time = calculate_time(status.intval, 0); + if (info->time == -1) + info->time = calculate_time(status.intval, 1); } } else { - if (MPSY_PROP(TIME_TO_EMPTY_AVG, &time_to_empty)) { - if (MPSY_PROP(TIME_TO_EMPTY_NOW, &time_to_empty)) - info->time = calculate_time(status.intval); - else - info->time = time_to_empty.intval / 60; + if (!MPSY_PROP(TIME_TO_EMPTY_AVG, &time_to_empty) || + !MPSY_PROP(TIME_TO_EMPTY_NOW, &time_to_empty)) { + info->time = time_to_empty.intval / 60; + } else { + info->time = calculate_time(status.intval, 0); + if (info->time == -1) + info->time = calculate_time(status.intval, 1); } } |