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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/i2c/Kconfig
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+# SPDX-License-Identifier: GPL-2.0-only
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 #
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 # I2C subsystem configuration
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 #
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 	tristate "I2C support"
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 	select RT_MUTEXES
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 	select IRQ_DOMAIN
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-	---help---
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+	help
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 	  I2C (pronounce: I-squared-C) is a slow serial bus protocol used in
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 	  many micro controller applications and developed by Philips.  SMBus,
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 	  or System Management Bus is a subset of the I2C protocol.  More
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 	  Say Y here to use i2c-* device files, usually found in the /dev
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 	  directory on your system.  They make it possible to have user-space
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 	  programs use the I2C bus.  Information on how to do this is
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-	  contained in the file <file:Documentation/i2c/dev-interface>.
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+	  contained in the file <file:Documentation/i2c/dev-interface.rst>.
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 	  This support is also available as a module.  If so, the module 
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 	  will be called i2c-dev.
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 	  This support is also available as a module.  If so, the module
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 	  will be called i2c-mux.
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-source drivers/i2c/muxes/Kconfig
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+source "drivers/i2c/muxes/Kconfig"
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 config I2C_HELPER_AUTO
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 	bool "Autoselect pertinent helper modules"
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 	  This support is also available as a module.  If so, the module
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 	  will be called i2c-smbus.
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-source drivers/i2c/algos/Kconfig
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-source drivers/i2c/busses/Kconfig
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+source "drivers/i2c/algos/Kconfig"
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+source "drivers/i2c/busses/Kconfig"
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 config I2C_STUB
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 	tristate "I2C/SMBus Test Stub"
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 	depends on m
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-	default 'n'
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 	help
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 	  This module may be useful to developers of SMBus client drivers,
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 	  especially for certain kinds of sensor chips.
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 	  If you do build this module, be sure to read the notes and warnings
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-	  in <file:Documentation/i2c/i2c-stub>.
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+	  in <file:Documentation/i2c/i2c-stub.rst>.
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 	  If you don't know what to do here, definitely say N.
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 config I2C_SLAVE
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 	bool "I2C slave support"
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+	help
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+	  This enables Linux to act as an I2C slave device. Note that your I2C
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+	  bus master driver also needs to support this functionality. Please
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+	  read Documentation/i2c/slave-interface.rst for further details.
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 if I2C_SLAVE
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 config I2C_SLAVE_EEPROM
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 	tristate "I2C eeprom slave driver"
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+	help
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+	  This backend makes Linux behave like an I2C EEPROM. Please read
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+	  Documentation/i2c/slave-eeprom-backend.rst for further details.
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+
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+config I2C_SLAVE_TESTUNIT
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+	tristate "I2C eeprom testunit driver"
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+	help
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+	  This backend can be used to trigger test cases for I2C bus masters
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+	  which require a remote device with certain capabilities, e.g.
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+	  multi-master, SMBus Host Notify, etc. Please read
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+	  Documentation/i2c/slave-testunit-backend.rst for further details.
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 endif
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