Documentation/ABI/stable/sysfs-class-udc

   1 What:           /sys/class/udc/<udc>/a_alt_hnp_support
   2 Date:           June 2011
   3 KernelVersion:  3.1
   4 Contact:        Felipe Balbi <[email protected]>
   5 Description:
   6                 Indicates if an OTG A-Host supports HNP at an alternate port.
   7 Users:
   8
   9 What:           /sys/class/udc/<udc>/a_hnp_support
  10 Date:           June 2011
  11 KernelVersion:  3.1
  12 Contact:        Felipe Balbi <[email protected]>
  13 Description:
  14                 Indicates if an OTG A-Host supports HNP at this port.
  15 Users:
  16
  17 What:           /sys/class/udc/<udc>/b_hnp_enable
  18 Date:           June 2011
  19 KernelVersion:  3.1
  20 Contact:        Felipe Balbi <[email protected]>
  21 Description:
  22                 Indicates if an OTG A-Host enabled HNP support.
  23 Users:
  24
  25 What:           /sys/class/udc/<udc>/current_speed
  26 Date:           June 2011
  27 KernelVersion:  3.1
  28 Contact:        Felipe Balbi <[email protected]>
  29 Description:
  30                 Indicates the current negotiated speed at this port.
  31 Users:
  32
  33 What:           /sys/class/udc/<udc>/is_a_peripheral
  34 Date:           June 2011
  35 KernelVersion:  3.1
  36 Contact:        Felipe Balbi <[email protected]>
  37 Description:
  38                 Indicates that this port is the default Host on an OTG session
  39                 but HNP was used to switch roles.
  40 Users:
  41
  42 What:           /sys/class/udc/<udc>/is_otg
  43 Date:           June 2011
  44 KernelVersion:  3.1
  45 Contact:        Felipe Balbi <[email protected]>
  46 Description:
  47                 Indicates that this port support OTG.
  48 Users:
  49
  50 What:           /sys/class/udc/<udc>/maximum_speed
  51 Date:           June 2011
  52 KernelVersion:  3.1
  53 Contact:        Felipe Balbi <[email protected]>
  54 Description:
  55                 Indicates the maximum USB speed supported by this port.
  56 Users:
  57
  58 What:           /sys/class/udc/<udc>/soft_connect
  59 Date:           June 2011
  60 KernelVersion:  3.1
  61 Contact:        Felipe Balbi <[email protected]>
  62 Description:
  63                 Allows users to disconnect data pullup resistors thus causing a
  64                 logical disconnection from the USB Host.
  65 Users:
  66
  67 What:           /sys/class/udc/<udc>/srp
  68 Date:           June 2011
  69 KernelVersion:  3.1
  70 Contact:        Felipe Balbi <[email protected]>
  71 Description:
  72                 Allows users to manually start Session Request Protocol.
  73 Users:
  74
  75 What:           /sys/class/udc/<udc>/state
  76 Date:           June 2011
  77 KernelVersion:  3.1
  78 Contact:        Felipe Balbi <[email protected]>
  79 Description:
  80                 Indicates current state of the USB Device Controller. Valid
  81                 states are: 'not-attached', 'attached', 'powered',
  82                 'reconnecting', 'unauthenticated', 'default', 'addressed',
  83                 'configured', and 'suspended'; however not all USB Device
  84                 Controllers support reporting all states.
  85 Users:
  86
  87 What:           /sys/class/udc/<udc>/function
  88 Date:           June 2017
  89 KernelVersion:  4.13
  90 Contact:        Felipe Balbi <[email protected]>
  91 Description:
  92                 Prints out name of currently running USB Gadget Driver.
  93 Users: