blob: 1db89b0cf80fe2c9e9f2caf97fdf75c0f44e6e72 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
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
|
