55 lines
1.7 KiB
Plaintext
55 lines
1.7 KiB
Plaintext
What: Raise a uevent when a USB charger is inserted or removed
|
|
Date: 2020-01-14
|
|
KernelVersion: 5.6
|
|
Contact: linux-usb@vger.kernel.org
|
|
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
|