| 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". |
