DEVCTL(8) System Manager's Manual DEVCTL(8) NAME devctl -- device control utility SYNOPSIS devctl attach device devctl clear driver [-f] device devctl detach [-f] device devctl disable [-f] device devctl enable device devctl suspend device devctl resume device devctl set driver [-f] device driver devctl rescan device devctl delete [-f] device DESCRIPTION The devctl utility adjusts the state of individual devices in the kernel's internal device hierarchy. Each invocation of devctl consists of a single command followed by command-specific arguments. Each command operates on a single device specified via the device argument. The device may be speci- fied either as the name of an existing device or as a bus-specific address. More details on supported address formats can be found in devctl(3). The following commands are supported: attach device Force the kernel to re-probe the device. If a suitable driver is found, it is attached to the device. detach [-f] device Detach the device from its current device driver. If the -f flag is specified, the device driver will be detached even if the device is busy. disable [-f] device Disable a device. If the device is currently attached to a device driver, the device driver will be detached from the device, but the device will retain its current name. If the -f flag is specified, the device driver will be detached even if the device is busy. enable device Enable a device. The device will probe and attach if a suitable device driver is found. Note that this can re-enable a device dis- abled at boot time via a loader tunable. suspend device Suspend a device. This may include placing the device in a reduced power state. resume device Resume a suspended device to a fully working state. set driver [-f] device driver Force the device to use a device driver named driver. If the de- vice is already attached to a device driver and the -f flag is specified, the device will be detached from its current device dri- ver before it is attached to the new device driver. If the device is already attached to a device driver and the -f flag is not spec- ified, the device will not be changed. clear driver [-f] device Clear a previously-forced driver name so that the device is able to use any valid device driver. After the previous name has been cleared, the device is reprobed so that other device drivers may attach to it. This can be used to undo an earlier set driver com- mand. If the device is currently attached to a device driver and the -f flag is not specified, the device will not be changed. rescan device Rescan a bus device checking for devices that have been added or removed. delete [-] device Delete the device from the device tree. If the -f flag is speci- fied, the device will be deleted even if it is physically present. This command should be used with care as a device that is deleted but present can no longer be used unless the parent bus device re- discovers the device via a rescan request. SEE ALSO devctl(3), devinfo(8) HISTORY The devctl utility first appeared in FreeBSD 10.3. FreeBSD 11.1 August 29, 2016 DEVCTL(8)
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY
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