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