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 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
总结
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