1config I2C_MUX 2 bool "Support I2C multiplexers" 3 depends on DM_I2C 4 help 5 This enables I2C buses to be multiplexed, so that you can select 6 one of several buses using some sort of control mechanism. The 7 bus select is handled automatically when that bus is accessed, 8 using a suitable I2C MUX driver. 9 10config SPL_I2C_MUX 11 bool "Support I2C multiplexers on SPL" 12 depends on I2C_MUX 13 help 14 This enables I2C buses to be multiplexed, so that you can select 15 one of several buses using some sort of control mechanism. The 16 bus select is handled automatically when that bus is accessed, 17 using a suitable I2C MUX driver. 18 19config I2C_ARB_GPIO_CHALLENGE 20 bool "GPIO-based I2C arbitration" 21 depends on I2C_MUX 22 help 23 If you say yes to this option, support will be included for an 24 I2C multimaster arbitration scheme using GPIOs and a challenge & 25 response mechanism where masters have to claim the bus by asserting 26 a GPIO. 27