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CONFIG_FW_LOADER: Firmware loading facility

General informations

The Linux kernel configuration item CONFIG_FW_LOADER has multiple definitions:

Firmware loading facility found in drivers/base/firmware_loader/Kconfig

The configuration item CONFIG_FW_LOADER:

Help text

This enables the firmware loading facility in the kernel. The kernel will first look for built-in firmware, if it has any. Next, it will look for the requested firmware in a series of filesystem paths:

o firmware_class path module parameter or kernel boot param o /lib/firmware/updates/UTS_RELEASE o /lib/firmware/updates o /lib/firmware/UTS_RELEASE o /lib/firmware

Enabling this feature only increases your kernel image by about 828 bytes, enable this option unless you are certain you don't need firmware.

You typically want this built-in (=y) but you can also enable this as a module, in which case the firmware_class module will be built. You also want to be sure to enable this built-in if you are going to enable built-in firmware (EXTRA_FIRMWARE).

Hotplug firmware loading support found in drivers/base/Kconfig

The configuration item CONFIG_FW_LOADER:

Help text

This option is provided for the case where no in-kernel-tree modules require hotplug firmware loading support, but a module built outside the kernel tree does.

Userspace firmware loading support found in drivers/base/Kconfig

The configuration item CONFIG_FW_LOADER:

Help text

This option is provided for the case where none of the in-tree modules require userspace firmware loading support, but a module built out-of-tree does.

Hardware

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