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- What: /sys/kernel/debug/<cros-ec-device>/console_log
- Date: September 2017
- KernelVersion: 4.13
- Description:
- If the EC supports the CONSOLE_READ command type, this file
- can be used to grab the EC logs. The kernel polls for the log
- and keeps its own buffer but userspace should grab this and
- write it out to some logs.
- What: /sys/kernel/debug/<cros-ec-device>/panicinfo
- Date: September 2017
- KernelVersion: 4.13
- Description:
- This file dumps the EC panic information from the previous
- reboot. This file will only exist if the PANIC_INFO command
- type is supported by the EC.
- What: /sys/kernel/debug/<cros-ec-device>/pdinfo
- Date: June 2018
- KernelVersion: 4.17
- Description:
- This file provides the port role, muxes and power debug
- information for all the USB PD/type-C ports available. If
- the are no ports available, this file will be just an empty
- file.
- What: /sys/kernel/debug/<cros-ec-device>/uptime
- Date: June 2019
- KernelVersion: 5.3
- Description:
- A u32 providing the time since EC booted in ms. This is
- is used for synchronizing the AP host time with the EC
- log. An error is returned if the command is not supported
- by the EC or there is a communication problem.
- What: /sys/kernel/debug/<cros-ec-device>/last_resume_result
- Date: June 2019
- KernelVersion: 5.3
- Description:
- Some ECs have a feature where they will track transitions to
- the (Intel) processor's SLP_S0 line, in order to detect cases
- where a system failed to go into S0ix. When the system resumes,
- an EC with this feature will return a summary of SLP_S0
- transitions that occurred. The last_resume_result file returns
- the most recent response from the AP's resume message to the EC.
- The bottom 31 bits contain a count of the number of SLP_S0
- transitions that occurred since the suspend message was
- received. Bit 31 is set if the EC attempted to wake the
- system due to a timeout when watching for SLP_S0 transitions.
- Callers can use this to detect a wake from the EC due to
- S0ix timeouts. The result will be zero if no suspend
- transitions have been attempted, or the EC does not support
- this feature.
- Output will be in the format: "0x%08x\n".
- What: /sys/kernel/debug/<cros-ec-device>/suspend_timeout_ms
- Date: August 2022
- KernelVersion: 6.1
- Description:
- Some ECs have a feature where they will track transitions of
- a hardware-controlled sleep line, such as Intel's SLP_S0 line,
- in order to detect cases where a system failed to go into deep
- sleep states. The suspend_timeout_ms file controls the amount of
- time in milliseconds the EC will wait before declaring a sleep
- timeout event and attempting to wake the system.
- Supply 0 to use the default value coded into EC firmware. Supply
- 65535 (EC_HOST_SLEEP_TIMEOUT_INFINITE) to disable the EC sleep
- failure detection mechanism. Values in between 0 and 65535
- indicate the number of milliseconds the EC should wait after a
- sleep transition before declaring a timeout. This includes both
- the duration after a sleep command was received but before the
- hardware line changed, as well as the duration between when the
- hardware line changed and the kernel sent an EC resume command.
- Output will be in the format: "%u\n".
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