1# 2# I2C subsystem configuration 3# 4 5menuconfig I2C 6 tristate "I2C support" 7 ---help--- 8 I2C (pronounce: I-square-C) is a slow serial bus protocol used in 9 many micro controller applications and developed by Philips. SMBus, 10 or System Management Bus is a subset of the I2C protocol. More 11 information is contained in the directory <file:Documentation/i2c/>, 12 especially in the file called "summary" there. 13 14 Both I2C and SMBus are supported here. You will need this for 15 hardware sensors support, and also for Video For Linux support. 16 17 If you want I2C support, you should say Y here and also to the 18 specific driver for your bus adapter(s) below. 19 20 This I2C support can also be built as a module. If so, the module 21 will be called i2c-core. 22 23if I2C 24 25config I2C_BOARDINFO 26 boolean 27 default y 28 29config I2C_CHARDEV 30 tristate "I2C device interface" 31 help 32 Say Y here to use i2c-* device files, usually found in the /dev 33 directory on your system. They make it possible to have user-space 34 programs use the I2C bus. Information on how to do this is 35 contained in the file <file:Documentation/i2c/dev-interface>. 36 37 This support is also available as a module. If so, the module 38 will be called i2c-dev. 39 40source drivers/i2c/algos/Kconfig 41source drivers/i2c/busses/Kconfig 42source drivers/i2c/chips/Kconfig 43 44config I2C_DEBUG_CORE 45 bool "I2C Core debugging messages" 46 help 47 Say Y here if you want the I2C core to produce a bunch of debug 48 messages to the system log. Select this if you are having a 49 problem with I2C support and want to see more of what is going on. 50 51config I2C_DEBUG_ALGO 52 bool "I2C Algorithm debugging messages" 53 help 54 Say Y here if you want the I2C algorithm drivers to produce a bunch 55 of debug messages to the system log. Select this if you are having 56 a problem with I2C support and want to see more of what is going 57 on. 58 59config I2C_DEBUG_BUS 60 bool "I2C Bus debugging messages" 61 help 62 Say Y here if you want the I2C bus drivers to produce a bunch of 63 debug messages to the system log. Select this if you are having 64 a problem with I2C support and want to see more of what is going 65 on. 66 67config I2C_DEBUG_CHIP 68 bool "I2C Chip debugging messages" 69 help 70 Say Y here if you want the I2C chip drivers to produce a bunch of 71 debug messages to the system log. Select this if you are having 72 a problem with I2C support and want to see more of what is going 73 on. 74 75endif # I2C 76