| Simon Glass | 3d1957f | 2015-08-03 08:19:21 -0600 | [diff] [blame] | 1 | config I2C_MUX |
| Michal Simek | 61d815a | 2015-12-08 11:18:53 +0100 | [diff] [blame] | 2 | bool "Support I2C multiplexers" |
| Simon Glass | 3d1957f | 2015-08-03 08:19:21 -0600 | [diff] [blame] | 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. |
| Simon Glass | b725dc4 | 2015-08-03 08:19:22 -0600 | [diff] [blame] | 9 | |
| Simon Glass | 4082fce | 2016-01-21 19:43:53 -0700 | [diff] [blame^] | 10 | config 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 | |
| Simon Glass | b725dc4 | 2015-08-03 08:19:22 -0600 | [diff] [blame] | 19 | config I2C_ARB_GPIO_CHALLENGE |
| Michal Simek | 0305be1 | 2015-12-08 11:18:54 +0100 | [diff] [blame] | 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. |