首先驱动需要先获取到2个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;}

充电的闪电图标和充电动画启动逻辑

闪电图标启动逻辑：POWER_SUPPLY_TYPE_USB的power supply上报USB类型(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);

充电动画的启动逻辑：POWER_SUPPLY_TYPE_BATTERY的power supply上报充电状态

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

利用dumpsys分析当前battery 状态

V2_PRO:/ # dumpsys batteryCurrent 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

如上主要关注2个字段：

USB powered : true

那么闪电图标应该会出现

status: 2

那么充电动画应该启动了

同时我们还可以通过shell指令的方式启动充电图标和充电动画

dumpsys battery set usb 1

闪电图标应该会出现

dumpsys battery set status 2

充电动画应该启动了

dumpsys battery set usb 0

闪电图标消失

dumpsys battery set status 4

充电动画消失