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33 .Nd device control utility
56 utility adjusts the state of individual devices in the kernel's
57 internal device hierarchy.
60 consists of a single command followed by command-specific arguments.
61 Each command operates on a single device specified via the
66 may be specified either as the name of an existing device or as a
68 More details on supported address formats can be found in
71 The following commands are supported:
72 .Bl -tag -width indent
73 .It Cm attach Ar device
74 Force the kernel to re-probe the device.
75 If a suitable driver is found,
76 it is attached to the device.
81 Detach the device from its current device driver.
85 the device driver will be detached even if the device is busy.
91 If the device is currently attached to a device driver,
92 the device driver will be detached from the device,
93 but the device will retain its current name.
97 the device driver will be detached even if the device is busy.
98 .It Cm enable Ar device
100 The device will probe and attach if a suitable device driver is found.
101 Note that this can re-enable a device disabled at boot time via a
107 Force the device to use a device driver named
109 If the device is already attached to a device driver and the
112 the device will be detached from its current device driver before it is
113 attached to the new device driver.
114 If the device is already attached to a device driver and the
116 flag is not specified,
117 the device will not be changed.
125 utility first appeared in