debugfs-cros-ec (2172B)
1What: /sys/kernel/debug/<cros-ec-device>/console_log 2Date: September 2017 3KernelVersion: 4.13 4Description: 5 If the EC supports the CONSOLE_READ command type, this file 6 can be used to grab the EC logs. The kernel polls for the log 7 and keeps its own buffer but userspace should grab this and 8 write it out to some logs. 9 10What: /sys/kernel/debug/<cros-ec-device>/panicinfo 11Date: September 2017 12KernelVersion: 4.13 13Description: 14 This file dumps the EC panic information from the previous 15 reboot. This file will only exist if the PANIC_INFO command 16 type is supported by the EC. 17 18What: /sys/kernel/debug/<cros-ec-device>/pdinfo 19Date: June 2018 20KernelVersion: 4.17 21Description: 22 This file provides the port role, muxes and power debug 23 information for all the USB PD/type-C ports available. If 24 the are no ports available, this file will be just an empty 25 file. 26 27What: /sys/kernel/debug/<cros-ec-device>/uptime 28Date: June 2019 29KernelVersion: 5.3 30Description: 31 A u32 providing the time since EC booted in ms. This is 32 is used for synchronizing the AP host time with the EC 33 log. An error is returned if the command is not supported 34 by the EC or there is a communication problem. 35 36What: /sys/kernel/debug/<cros-ec-device>/last_resume_result 37Date: June 2019 38KernelVersion: 5.3 39Description: 40 Some ECs have a feature where they will track transitions to 41 the (Intel) processor's SLP_S0 line, in order to detect cases 42 where a system failed to go into S0ix. When the system resumes, 43 an EC with this feature will return a summary of SLP_S0 44 transitions that occurred. The last_resume_result file returns 45 the most recent response from the AP's resume message to the EC. 46 47 The bottom 31 bits contain a count of the number of SLP_S0 48 transitions that occurred since the suspend message was 49 received. Bit 31 is set if the EC attempted to wake the 50 system due to a timeout when watching for SLP_S0 transitions. 51 Callers can use this to detect a wake from the EC due to 52 S0ix timeouts. The result will be zero if no suspend 53 transitions have been attempted, or the EC does not support 54 this feature. 55 56 Output will be in the format: "0x%08x\n".