1# 2# I2C subsystem configuration 3# 4 5menuconfig I2C 6 tristate "I2C support" 7 depends on HAS_IOMEM 8 ---help--- 9 I2C (pronounce: I-square-C) is a slow serial bus protocol used in 10 many micro controller applications and developed by Philips. SMBus, 11 or System Management Bus is a subset of the I2C protocol. More 12 information is contained in the directory <file:Documentation/i2c/>, 13 especially in the file called "summary" there. 14 15 Both I2C and SMBus are supported here. You will need this for 16 hardware sensors support, and also for Video For Linux support. 17 18 If you want I2C support, you should say Y here and also to the 19 specific driver for your bus adapter(s) below. 20 21 This I2C support can also be built as a module. If so, the module 22 will be called i2c-core. 23 24if I2C 25 26config I2C_BOARDINFO 27 boolean 28 default y 29 30config I2C_CHARDEV 31 tristate "I2C device interface" 32 help 33 Say Y here to use i2c-* device files, usually found in the /dev 34 directory on your system. They make it possible to have user-space 35 programs use the I2C bus. Information on how to do this is 36 contained in the file <file:Documentation/i2c/dev-interface>. 37 38 This support is also available as a module. If so, the module 39 will be called i2c-dev. 40 41source drivers/i2c/algos/Kconfig 42source drivers/i2c/busses/Kconfig 43source drivers/i2c/chips/Kconfig 44 45config I2C_DEBUG_CORE 46 bool "I2C Core debugging messages" 47 help 48 Say Y here if you want the I2C core to produce a bunch of debug 49 messages to the system log. Select this if you are having a 50 problem with I2C support and want to see more of what is going on. 51 52config I2C_DEBUG_ALGO 53 bool "I2C Algorithm debugging messages" 54 help 55 Say Y here if you want the I2C algorithm drivers to produce a bunch 56 of debug messages to the system log. Select this if you are having 57 a problem with I2C support and want to see more of what is going 58 on. 59 60config I2C_DEBUG_BUS 61 bool "I2C Bus debugging messages" 62 help 63 Say Y here if you want the I2C bus drivers to produce a bunch of 64 debug messages to the system log. Select this if you are having 65 a problem with I2C support and want to see more of what is going 66 on. 67 68config I2C_DEBUG_CHIP 69 bool "I2C Chip debugging messages" 70 help 71 Say Y here if you want the I2C chip drivers to produce a bunch of 72 debug messages to the system log. Select this if you are having 73 a problem with I2C support and want to see more of what is going 74 on. 75 76endif # I2C 77