| Simon Glass | 6fb9ac1 | 2015-02-13 12:20:47 -0700 | [diff] [blame] | 1 | config CMD_CROS_EC |
| 2 | bool "Enable crosec command" |
| 3 | depends on CROS_EC |
| 4 | help |
| 5 | Enable command-line access to the Chrome OS EC (Embedded |
| 6 | Controller). This provides the 'crosec' command which has |
| 7 | a number of sub-commands for performing EC tasks such as |
| 8 | updating its flash, accessing a small saved context area |
| 9 | and talking to the I2C bus behind the EC (if there is one). |
| 10 | |
| 11 | config CROS_EC |
| 12 | bool "Enable Chrome OS EC" |
| 13 | help |
| 14 | Enable access to the Chrome OS EC. This is a separate |
| 15 | microcontroller typically available on a SPI bus on Chromebooks. It |
| 16 | provides access to the keyboard, some internal storage and may |
| 17 | control access to the battery and main PMIC depending on the |
| 18 | device. You can use the 'crosec' command to access it. |
| 19 | |
| 20 | config CROS_EC_I2C |
| 21 | bool "Enable Chrome OS EC I2C driver" |
| 22 | depends on CROS_EC |
| 23 | help |
| 24 | Enable I2C access to the Chrome OS EC. This is used on older |
| 25 | ARM Chromebooks such as snow and spring before the standard bus |
| 26 | changed to SPI. The EC will accept commands across the I2C using |
| 27 | a special message protocol, and provide responses. |
| 28 | |
| 29 | config CROS_EC_LPC |
| 30 | bool "Enable Chrome OS EC LPC driver" |
| 31 | depends on CROS_EC |
| 32 | help |
| 33 | Enable I2C access to the Chrome OS EC. This is used on x86 |
| 34 | Chromebooks such as link and falco. The keyboard is provided |
| 35 | through a legacy port interface, so on x86 machines the main |
| 36 | function of the EC is power and thermal management. |
| 37 | |
| 38 | config CROS_EC_SPI |
| 39 | bool "Enable Chrome OS EC SPI driver" |
| 40 | depends on CROS_EC |
| 41 | help |
| 42 | Enable SPI access to the Chrome OS EC. This is used on newer |
| 43 | ARM Chromebooks such as pit, pi and nyan-big. The SPI interface |
| 44 | provides a faster and more robust interface than I2C but the bugs |
| 45 | are less interesting. |
| 46 | |
| Simon Glass | f94a1be | 2015-02-05 21:41:35 -0700 | [diff] [blame] | 47 | config DM_CROS_EC |
| 48 | bool "Enable Driver Model for Chrome OS EC" |
| 49 | depends on DM |
| 50 | help |
| 51 | Enable driver model for the Chrome OS EC interface. This |
| 52 | allows the cros_ec SPI driver to operate with CONFIG_DM_SPI |
| 53 | but otherwise makes few changes. Since cros_ec also supports |
| Simon Glass | 6fb9ac1 | 2015-02-13 12:20:47 -0700 | [diff] [blame] | 54 | LPC (which doesn't support driver model yet), a full |
| Simon Glass | f94a1be | 2015-02-05 21:41:35 -0700 | [diff] [blame] | 55 | conversion is not yet possible. |