0001 What: /sys/kernel/debug/<cros-ec-device>/console_log
0002 Date: September 2017
0003 KernelVersion: 4.13
0004 Description:
0005 If the EC supports the CONSOLE_READ command type, this file
0006 can be used to grab the EC logs. The kernel polls for the log
0007 and keeps its own buffer but userspace should grab this and
0008 write it out to some logs.
0009
0010 What: /sys/kernel/debug/<cros-ec-device>/panicinfo
0011 Date: September 2017
0012 KernelVersion: 4.13
0013 Description:
0014 This file dumps the EC panic information from the previous
0015 reboot. This file will only exist if the PANIC_INFO command
0016 type is supported by the EC.
0017
0018 What: /sys/kernel/debug/<cros-ec-device>/pdinfo
0019 Date: June 2018
0020 KernelVersion: 4.17
0021 Description:
0022 This file provides the port role, muxes and power debug
0023 information for all the USB PD/type-C ports available. If
0024 the are no ports available, this file will be just an empty
0025 file.
0026
0027 What: /sys/kernel/debug/<cros-ec-device>/uptime
0028 Date: June 2019
0029 KernelVersion: 5.3
0030 Description:
0031 A u32 providing the time since EC booted in ms. This is
0032 is used for synchronizing the AP host time with the EC
0033 log. An error is returned if the command is not supported
0034 by the EC or there is a communication problem.
0035
0036 What: /sys/kernel/debug/<cros-ec-device>/last_resume_result
0037 Date: June 2019
0038 KernelVersion: 5.3
0039 Description:
0040 Some ECs have a feature where they will track transitions to
0041 the (Intel) processor's SLP_S0 line, in order to detect cases
0042 where a system failed to go into S0ix. When the system resumes,
0043 an EC with this feature will return a summary of SLP_S0
0044 transitions that occurred. The last_resume_result file returns
0045 the most recent response from the AP's resume message to the EC.
0046
0047 The bottom 31 bits contain a count of the number of SLP_S0
0048 transitions that occurred since the suspend message was
0049 received. Bit 31 is set if the EC attempted to wake the
0050 system due to a timeout when watching for SLP_S0 transitions.
0051 Callers can use this to detect a wake from the EC due to
0052 S0ix timeouts. The result will be zero if no suspend
0053 transitions have been attempted, or the EC does not support
0054 this feature.
0055
0056 Output will be in the format: "0x%08x\n".
