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