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- What: Raise a uevent when a USB charger is inserted or removed
- Date: 2020-01-14
- KernelVersion: 5.6
- Contact: [email protected]
- Description: There are two USB charger states:
- - USB_CHARGER_ABSENT
- - USB_CHARGER_PRESENT
- There are five USB charger types:
- ======================== ==========================
- USB_CHARGER_UNKNOWN_TYPE Charger type is unknown
- USB_CHARGER_SDP_TYPE Standard Downstream Port
- USB_CHARGER_CDP_TYPE Charging Downstream Port
- USB_CHARGER_DCP_TYPE Dedicated Charging Port
- USB_CHARGER_ACA_TYPE Accessory Charging Adapter
- ======================== ==========================
- https://www.usb.org/document-library/battery-charging-v12-spec-and-adopters-agreement
- Here are two examples taken using ``udevadm monitor -p`` when
- USB charger is online::
- UDEV change /devices/soc0/usbphynop1 (platform)
- ACTION=change
- DEVPATH=/devices/soc0/usbphynop1
- DRIVER=usb_phy_generic
- MODALIAS=of:Nusbphynop1T(null)Cusb-nop-xceiv
- OF_COMPATIBLE_0=usb-nop-xceiv
- OF_COMPATIBLE_N=1
- OF_FULLNAME=/usbphynop1
- OF_NAME=usbphynop1
- SEQNUM=2493
- SUBSYSTEM=platform
- USB_CHARGER_STATE=USB_CHARGER_PRESENT
- USB_CHARGER_TYPE=USB_CHARGER_SDP_TYPE
- USEC_INITIALIZED=227422826
- USB charger is offline::
- KERNEL change /devices/soc0/usbphynop1 (platform)
- ACTION=change
- DEVPATH=/devices/soc0/usbphynop1
- DRIVER=usb_phy_generic
- MODALIAS=of:Nusbphynop1T(null)Cusb-nop-xceiv
- OF_COMPATIBLE_0=usb-nop-xceiv
- OF_COMPATIBLE_N=1
- OF_FULLNAME=/usbphynop1
- OF_NAME=usbphynop1
- SEQNUM=2494
- SUBSYSTEM=platform
- USB_CHARGER_STATE=USB_CHARGER_ABSENT
- USB_CHARGER_TYPE=USB_CHARGER_UNKNOWN_TYPE
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