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# SPDX-License-Identifier: GPL-2.0-only
menuconfig USB4
tristate "Unified support for USB4 and Thunderbolt"
depends on PCI
select APPLE_PROPERTIES if EFI_STUB && X86
select CRC32
select CRYPTO
select CRYPTO_HASH
select NVMEM
help
USB4 and Thunderbolt driver. USB4 is the public specification
based on the Thunderbolt 3 protocol. This driver is required if
you want to hotplug Thunderbolt and USB4 compliant devices on
Apple hardware or on PCs with Intel Falcon Ridge or newer.
To compile this driver a module, choose M here. The module will be
called thunderbolt.
config USB4_DEBUGFS_WRITE
bool "Enable write by debugfs to configuration spaces (DANGEROUS)"
depends on USB4
help
Enables writing to device configuration registers through
debugfs interface.
Only enable this if you know what you are doing! Never enable
this for production systems or distro kernels.
config USB4_KUNIT_TEST
bool "KUnit tests"
depends on KUNIT=y
depends on USB4=y
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