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| -rw-r--r-- | drivers/i2c/Kconfig | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig new file mode 100644 index 000000000..438905e2a --- /dev/null +++ b/drivers/i2c/Kconfig @@ -0,0 +1,164 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# I2C subsystem configuration +# + +menu "I2C support" + +config I2C + tristate "I2C support" + select RT_MUTEXES + select IRQ_DOMAIN + help + I2C (pronounce: I-squared-C) is a slow serial bus protocol used in + many micro controller applications and developed by Philips. SMBus, + or System Management Bus is a subset of the I2C protocol. More + information is contained in the directory <file:Documentation/i2c/>, + especially in the file called "summary" there. + + Both I2C and SMBus are supported here. You will need this for + hardware sensors support, and also for Video For Linux support. + + If you want I2C support, you should say Y here and also to the + specific driver for your bus adapter(s) below. + + This I2C support can also be built as a module. If so, the module + will be called i2c-core. + +config ACPI_I2C_OPREGION + bool "ACPI I2C Operation region support" + depends on I2C=y && ACPI + default y + help + Say Y here if you want to enable ACPI I2C operation region support. + Operation Regions allow firmware (BIOS) code to access I2C slave devices, + such as smart batteries through an I2C host controller driver. + +if I2C + +config I2C_BOARDINFO + bool + default y + +config I2C_COMPAT + bool "Enable compatibility bits for old user-space" + default y + help + Say Y here if you intend to run lm-sensors 3.1.1 or older, or any + other user-space package which expects i2c adapters to be class + devices. If you don't know, say Y. + +config I2C_CHARDEV + tristate "I2C device interface" + help + Say Y here to use i2c-* device files, usually found in the /dev + directory on your system. They make it possible to have user-space + programs use the I2C bus. Information on how to do this is + contained in the file <file:Documentation/i2c/dev-interface.rst>. + + This support is also available as a module. If so, the module + will be called i2c-dev. + +config I2C_MUX + tristate "I2C bus multiplexing support" + help + Say Y here if you want the I2C core to support the ability to + handle multiplexed I2C bus topologies, by presenting each + multiplexed segment as a I2C adapter. + + This support is also available as a module. If so, the module + will be called i2c-mux. + +source "drivers/i2c/muxes/Kconfig" + +config I2C_HELPER_AUTO + bool "Autoselect pertinent helper modules" + default y + help + Some I2C bus drivers require so-called "I2C algorithm" modules + to work. These are basically software-only abstractions of generic + I2C interfaces. This option will autoselect them so that you don't + have to care. + + Unselect this only if you need to enable additional helper + modules, for example for use with external I2C bus drivers. + + In doubt, say Y. + +config I2C_SMBUS + tristate "SMBus-specific protocols" if !I2C_HELPER_AUTO + help + Say Y here if you want support for SMBus extensions to the I2C + specification. At the moment, two extensions are supported: + the SMBus Alert protocol and the SMBus Host Notify protocol. + + This support is also available as a module. If so, the module + will be called i2c-smbus. + +source "drivers/i2c/algos/Kconfig" +source "drivers/i2c/busses/Kconfig" + +config I2C_STUB + tristate "I2C/SMBus Test Stub" + depends on m + help + This module may be useful to developers of SMBus client drivers, + especially for certain kinds of sensor chips. + + If you do build this module, be sure to read the notes and warnings + in <file:Documentation/i2c/i2c-stub.rst>. + + If you don't know what to do here, definitely say N. + +config I2C_SLAVE + bool "I2C slave support" + help + This enables Linux to act as an I2C slave device. Note that your I2C + bus master driver also needs to support this functionality. Please + read Documentation/i2c/slave-interface.rst for further details. + +if I2C_SLAVE + +config I2C_SLAVE_EEPROM + tristate "I2C eeprom slave driver" + help + This backend makes Linux behave like an I2C EEPROM. Please read + Documentation/i2c/slave-eeprom-backend.rst for further details. + +config I2C_SLAVE_TESTUNIT + tristate "I2C eeprom testunit driver" + help + This backend can be used to trigger test cases for I2C bus masters + which require a remote device with certain capabilities, e.g. + multi-master, SMBus Host Notify, etc. Please read + Documentation/i2c/slave-testunit-backend.rst for further details. + +endif + +config I2C_DEBUG_CORE + bool "I2C Core debugging messages" + help + Say Y here if you want the I2C core to produce a bunch of debug + messages to the system log. Select this if you are having a + problem with I2C support and want to see more of what is going on. + +config I2C_DEBUG_ALGO + bool "I2C Algorithm debugging messages" + help + Say Y here if you want the I2C algorithm drivers to produce a bunch + of debug messages to the system log. Select this if you are having + a problem with I2C support and want to see more of what is going + on. + +config I2C_DEBUG_BUS + bool "I2C Bus debugging messages" + depends on HAS_IOMEM + help + Say Y here if you want the I2C bus drivers to produce a bunch of + debug messages to the system log. Select this if you are having + a problem with I2C support and want to see more of what is going + on. + +endif # I2C + +endmenu |