Android start charging and charging animation icon

First we need to get to drive two power supply

kernel\msm-3.18\drivers\usb\phy\phy-msm-usb.c

motg->usb_psy.name = "usb";
motg->usb_psy.type = POWER_SUPPLY_TYPE_USB;
motg->usb_psy.supplied_to = otg_pm_power_supplied_to;
motg->usb_psy.num_supplicants = ARRAY_SIZE(otg_pm_power_supplied_to);
motg->usb_psy.properties = otg_pm_power_props_usb;
motg->usb_psy.num_properties = ARRAY_SIZE(otg_pm_power_props_usb);
motg->usb_psy.get_property = otg_power_get_property_usb;
motg->usb_psy.set_property = otg_power_set_property_usb;
motg->usb_psy.property_is_writeable
    = otg_power_property_is_writeable_usb;

if (!msm_otg_register_power_supply(pdev, motg))
    psy = &motg->usb_psy;

kernel\msm-3.18\drivers\power\bq2570x\bq2570x_charger.c

    usb_psy = power_supply_get_by_name("usb");

static int bq2570x_psy_register(struct bq2570x *bq)
{
    int ret;

    bq->batt_psy.name = "dc_o2";
    bq->batt_psy.type = POWER_SUPPLY_TYPE_BATTERY;
    bq->batt_psy.properties = bq2570x_charger_props;
    bq->batt_psy.num_properties = ARRAY_SIZE(bq2570x_charger_props);
    bq->batt_psy.get_property = bq2570x_charger_get_property;
    bq->batt_psy.set_property = bq2570x_charger_set_property;
    bq->batt_psy.external_power_changed = bq2570x_external_power_changed;
    bq->batt_psy.property_is_writeable = bq2570x_charger_is_writeable;

    ret = power_supply_register(bq->dev, &bq->batt_psy);
    if (ret < 0) {
        pr_err("failed to register batt_psy:%d\n", ret);
        return ret;
    }

    return 0;
}

Charging lightning bolt icon and start charging animation logic

Lightning icon to start the logic: POWER_SUPPLY_TYPE_USB report USB type of power supply (CDP, DCP, USB)

power_supply_set_supply_type(bq->usb_psy, POWER_SUPPLY_TYPE_USB);
ret = power_supply_set_online(bq->usb_psy, true);
power_supply_changed(bq->usb_psy);

Start charging logic animation: POWER_SUPPLY_TYPE_BATTERY reporting the state of charge of the power supply (CHARGE_STATE_NOT_CHARGING, CHARGE_STATE_FASTCHARGE)

bq->charge_state = CHARGE_STATE_FASTCHARGE;
power_supply_changed(&bq->batt_psy);

Analysis of the current state of battery use dumpsys

V2_PRO:/ # dumpsys battery
Current Battery Service state:
  AC powered: false
  USB powered: true
  Wireless powered: false
  Max charging current: 0
  Max charging voltage: 0
  Charge counter: 0
  status: 2
  health: 2
  present: true
  level: 46
  scale: 100
  voltage: 7
  temperature: 270
  technology: Li-ion

As the main concern two fields:

USB powered : true

Then the lightning bolt icon should appear

status: 2
then started charging animation should

We can also start charging the battery icon and animation through shell command

dumpsys battery set usb 1

Lightning icon should appear

dumpsys battery set status 2

The animation should start charging

dumpsys battery set usb 0

Lightning icon disappears

dumpsys battery set status 4

Charging animation disappears

Android start charging and charging animation icon

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