# SPDX-License-Identifier: GPL-2.0-onlymenuconfig USB4	tristate "Unified support for USB4 and Thunderbolt"	depends on PCI	select APPLE_PROPERTIES if EFI_STUB && X86	select CRC32	select CRYPTO_LIB_SHA256	select CRYPTO_LIB_UTILS	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. if USB4 config USB4_CONFIGFS	def_tristate USB4	depends on CONFIGFS_FS && !(USB4=y && CONFIGFS_FS=m) config USB4_DEBUGFS_WRITE	bool "Enable write by debugfs to configuration spaces (DANGEROUS)"	help	  Enables writing to device configuration registers through	  debugfs interface. You can use tools such as Thunderbolt/USB4	  debugging tools to access these registers. For more	  information see: 	    https://github.com/intel/tbtools 	  Only enable this if you know what you are doing! Never enable	  this for production systems or distro kernels. config USB4_DEBUGFS_MARGINING	bool "Expose receiver lane margining operations under USB4 ports and retimers (DANGEROUS)"	depends on DEBUG_FS	depends on USB4_DEBUGFS_WRITE	help	  Enables hardware and software based receiver lane margining	  support under each USB4 port and retimer, including retimers	  on the other side of the cable. Used for electrical quality	  and robustness validation during manufacturing. Should not be	  enabled by distro kernels. config USB4_KUNIT_TEST	bool "KUnit tests" if !KUNIT_ALL_TESTS	depends on USB4 && KUNIT=y	default KUNIT_ALL_TESTS config USB4_DMA_TEST	tristate "DMA traffic test driver"	depends on DEBUG_FS	help	  This allows sending and receiving DMA traffic through loopback	  connection. Loopback connection can be done by either special	  dongle that has TX/RX lines crossed, or by simply connecting a	  cable back to the host. Only enable this if you know what you	  are doing. Normal users and distro kernels should say N here. 	  To compile this driver a module, choose M here. The module will be	  called thunderbolt_dma_test. config USB4_STREAM	tristate "Stream data over Thunderbolt/USB4 cable"	depends on USB4_CONFIGFS	help	  This adds support for USB4STREAM protocol that allows two	  hosts to stream data directly over Thunderbolt/USB4 cable	  through /dev/tbstreamX devices. 	  To compile this driver a module, choose M here. The module will be	  called thunderbolt_stream. endif # USB4