1*6fb9ac15SSimon Glassconfig CMD_CROS_EC 2*6fb9ac15SSimon Glass bool "Enable crosec command" 3*6fb9ac15SSimon Glass depends on CROS_EC 4*6fb9ac15SSimon Glass help 5*6fb9ac15SSimon Glass Enable command-line access to the Chrome OS EC (Embedded 6*6fb9ac15SSimon Glass Controller). This provides the 'crosec' command which has 7*6fb9ac15SSimon Glass a number of sub-commands for performing EC tasks such as 8*6fb9ac15SSimon Glass updating its flash, accessing a small saved context area 9*6fb9ac15SSimon Glass and talking to the I2C bus behind the EC (if there is one). 10*6fb9ac15SSimon Glass 11*6fb9ac15SSimon Glassconfig CROS_EC 12*6fb9ac15SSimon Glass bool "Enable Chrome OS EC" 13*6fb9ac15SSimon Glass help 14*6fb9ac15SSimon Glass Enable access to the Chrome OS EC. This is a separate 15*6fb9ac15SSimon Glass microcontroller typically available on a SPI bus on Chromebooks. It 16*6fb9ac15SSimon Glass provides access to the keyboard, some internal storage and may 17*6fb9ac15SSimon Glass control access to the battery and main PMIC depending on the 18*6fb9ac15SSimon Glass device. You can use the 'crosec' command to access it. 19*6fb9ac15SSimon Glass 20*6fb9ac15SSimon Glassconfig CROS_EC_I2C 21*6fb9ac15SSimon Glass bool "Enable Chrome OS EC I2C driver" 22*6fb9ac15SSimon Glass depends on CROS_EC 23*6fb9ac15SSimon Glass help 24*6fb9ac15SSimon Glass Enable I2C access to the Chrome OS EC. This is used on older 25*6fb9ac15SSimon Glass ARM Chromebooks such as snow and spring before the standard bus 26*6fb9ac15SSimon Glass changed to SPI. The EC will accept commands across the I2C using 27*6fb9ac15SSimon Glass a special message protocol, and provide responses. 28*6fb9ac15SSimon Glass 29*6fb9ac15SSimon Glassconfig CROS_EC_LPC 30*6fb9ac15SSimon Glass bool "Enable Chrome OS EC LPC driver" 31*6fb9ac15SSimon Glass depends on CROS_EC 32*6fb9ac15SSimon Glass help 33*6fb9ac15SSimon Glass Enable I2C access to the Chrome OS EC. This is used on x86 34*6fb9ac15SSimon Glass Chromebooks such as link and falco. The keyboard is provided 35*6fb9ac15SSimon Glass through a legacy port interface, so on x86 machines the main 36*6fb9ac15SSimon Glass function of the EC is power and thermal management. 37*6fb9ac15SSimon Glass 38*6fb9ac15SSimon Glassconfig CROS_EC_SPI 39*6fb9ac15SSimon Glass bool "Enable Chrome OS EC SPI driver" 40*6fb9ac15SSimon Glass depends on CROS_EC 41*6fb9ac15SSimon Glass help 42*6fb9ac15SSimon Glass Enable SPI access to the Chrome OS EC. This is used on newer 43*6fb9ac15SSimon Glass ARM Chromebooks such as pit, pi and nyan-big. The SPI interface 44*6fb9ac15SSimon Glass provides a faster and more robust interface than I2C but the bugs 45*6fb9ac15SSimon Glass are less interesting. 46*6fb9ac15SSimon Glass 47f94a1bedSSimon Glassconfig DM_CROS_EC 48f94a1bedSSimon Glass bool "Enable Driver Model for Chrome OS EC" 49f94a1bedSSimon Glass depends on DM 50f94a1bedSSimon Glass help 51f94a1bedSSimon Glass Enable driver model for the Chrome OS EC interface. This 52f94a1bedSSimon Glass allows the cros_ec SPI driver to operate with CONFIG_DM_SPI 53f94a1bedSSimon Glass but otherwise makes few changes. Since cros_ec also supports 54*6fb9ac15SSimon Glass LPC (which doesn't support driver model yet), a full 55f94a1bedSSimon Glass conversion is not yet possible. 56