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
来源: http://www.bubuko.com/infodetail-3340397.html