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CONFIG_USB_FUNCTIONFS: Function Filesystem

General informations

The Linux kernel configuration item CONFIG_USB_FUNCTIONFS has multiple definitions:

Function Filesystem (EXPERIMENTAL) found in drivers/usb/gadget/Kconfig

The configuration item CONFIG_USB_FUNCTIONFS:

Help text

The Function Filesystem (FunctionFS) lets one create USB composite functions in user space in the same way GadgetFS lets one create USB gadgets in user space. This allows creation of composite gadgets such that some of the functions are implemented in kernel space (for instance Ethernet, serial or mass storage) and other are implemented in user space.

If you say "y" or "m" here you will be able what kind of configurations the gadget will provide.

Say "y" to link the driver statically, or "m" to build a dynamically linked module called "g_ffs".

Function Filesystem found in drivers/usb/gadget/Kconfig

The configuration item CONFIG_USB_FUNCTIONFS:

Help text

The Function Filesystem (FunctionFS) lets one create USB composite functions in user space in the same way GadgetFS lets one create USB gadgets in user space. This allows creation of composite gadgets such that some of the functions are implemented in kernel space (for instance Ethernet, serial or mass storage) and other are implemented in user space.

If you say "y" or "m" here you will be able what kind of configurations the gadget will provide.

Say "y" to link the driver statically, or "m" to build a dynamically linked module called "g_ffs".

Function Filesystem found in drivers/usb/gadget/legacy/Kconfig

The configuration item CONFIG_USB_FUNCTIONFS:

Help text

The Function Filesystem (FunctionFS) lets one create USB composite functions in user space in the same way GadgetFS lets one create USB gadgets in user space. This allows creation of composite gadgets such that some of the functions are implemented in kernel space (for instance Ethernet, serial or mass storage) and other are implemented in user space.

If you say "y" or "m" here you will be able what kind of configurations the gadget will provide.

Say "y" to link the driver statically, or "m" to build a dynamically linked module called "g_ffs".

Hardware

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