add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/thunderbolt/Kconfig
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@@ -1,16 +1,34 @@
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-menuconfig THUNDERBOLT
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-	tristate "Thunderbolt support"
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+# 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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-	depends on X86 || COMPILE_TEST
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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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-	  Thunderbolt Controller driver. This driver is required if you
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-	  want to hotplug Thunderbolt devices on Apple hardware or on PCs
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-	  with Intel Falcon Ridge or newer.
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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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+
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+if USB4
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+
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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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+
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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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+
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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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+
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+endif # USB4