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CONFIG_USB_SUSPEND: USB runtime power management (suspend/resume and wakeup)

General informations

The Linux kernel configuration item CONFIG_USB_SUSPEND has multiple definitions:

USB runtime power management (autosuspend) and wakeup found in drivers/usb/core/Kconfig

The configuration item CONFIG_USB_SUSPEND:

Help text

If you say Y here, you can use driver calls or the sysfs "power/control" file to enable or disable autosuspend for individual USB peripherals (see Documentation/usb/power-management.txt for more details).

Also, USB "remote wakeup" signaling is supported, whereby some USB devices (like keyboards and network adapters) can wake up their parent hub. That wakeup cascades up the USB tree, and could wake the system from states like suspend-to-RAM.

If you are unsure about this, say N here.

USB runtime power management (suspend/resume and wakeup) found in drivers/usb/core/Kconfig

The configuration item CONFIG_USB_SUSPEND:

Help text

If you say Y here, you can use driver calls or the sysfs "power/level" file to suspend or resume individual USB peripherals and to enable or disable autosuspend (see Documentation/usb/power-management.txt for more details).

Also, USB "remote wakeup" signaling is supported, whereby some USB devices (like keyboards and network adapters) can wake up their parent hub. That wakeup cascades up the USB tree, and could wake the system from states like suspend-to-RAM.

If you are unsure about this, say N here.

USB selective suspend/resume and wakeup (EXPERIMENTAL) found in drivers/usb/core/Kconfig

The configuration item CONFIG_USB_SUSPEND:

Help text

If you say Y here, you can use driver calls or the sysfs "power/state" file to suspend or resume individual USB peripherals.

Also, USB "remote wakeup" signaling is supported, whereby some USB devices (like keyboards and network adapters) can wake up their parent hub. That wakeup cascades up the USB tree, and could wake the system from states like suspend-to-RAM.

If you are unsure about this, say N here.

USB selective suspend/resume and wakeup found in drivers/usb/core/Kconfig

The configuration item CONFIG_USB_SUSPEND:

Help text

If you say Y here, you can use driver calls or the sysfs "power/level" file to suspend or resume individual USB peripherals and to enable or disable autosuspend (see Documentation/usb/power-management.txt for more details).

Also, USB "remote wakeup" signaling is supported, whereby some USB devices (like keyboards and network adapters) can wake up their parent hub. That wakeup cascades up the USB tree, and could wake the system from states like suspend-to-RAM.

If you are unsure about this, say N here.

USB suspend/resume (EXPERIMENTAL) found in drivers/usb/core/Kconfig

The configuration item CONFIG_USB_SUSPEND:

Help text

If you say Y here, you can use driver calls or the sysfs "power/state" file to suspend or resume individual USB peripherals. There are many related features, such as remote wakeup and driver-specific suspend processing, that may not yet work as expected.

If you are unsure about this, say N here.

Hardware

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