Android 開機充電圖標和充電動畫

1. 首先驅動需要先獲取到2個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;
}

2. 充電的閃電圖標和充電動畫啟動邏輯

閃電圖標啟動邏輯：POWER_SUPPLY_TYPE_USB的power supply上報USB類型(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);

充電動畫的啟動邏輯：POWER_SUPPLY_TYPE_BATTERY的power supply上報充電狀態(CHARGE_STATE_NOT_CHARGING，CHARGE_STATE_FASTCHARGE)

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

3. 利用dumpsys分析當前battery 狀態

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

如上主要關注2個字段：

USB powered : true

那么閃電圖標應該會出現

status: 2
那么充電動畫應該啟動了

同時我們還可以通過shell指令的方式啟動充電圖標和充電動畫

dumpsys battery set usb 1

閃電圖標應該會出現

dumpsys battery set status 2

充電動畫應該啟動了

dumpsys battery set usb 0

閃電圖標消失

dumpsys battery set status 4

充電動畫消失