1 What: /sys/kernel/debug/<cros-ec-device>/console_log 2 Date: September 2017 3 KernelVersion: 4.13 4 Description: 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 10 What: /sys/kernel/debug/<cros-ec-device>/panicinfo 11 Date: September 2017 12 KernelVersion: 4.13 13 Description: 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 18 What: /sys/kernel/debug/<cros-ec-device>/pdinfo 19 Date: June 2018 20 KernelVersion: 4.17 21 Description: 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 27 What: /sys/kernel/debug/<cros-ec-device>/uptime 28 Date: June 2019 29 KernelVersion: 5.3 30 Description: 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 36 What: /sys/kernel/debug/<cros-ec-device>/last_resume_result 37 Date: June 2019 38 KernelVersion: 5.3 39 Description: 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". 57 58 What: /sys/kernel/debug/<cros-ec-device>/suspend_timeout_ms 59 Date: August 2022 60 KernelVersion: 6.1 61 Description: 62 Some ECs have a feature where they will track transitions of 63 a hardware-controlled sleep line, such as Intel's SLP_S0 line, 64 in order to detect cases where a system failed to go into deep 65 sleep states. The suspend_timeout_ms file controls the amount of 66 time in milliseconds the EC will wait before declaring a sleep 67 timeout event and attempting to wake the system. 68 69 Supply 0 to use the default value coded into EC firmware. Supply 70 65535 (EC_HOST_SLEEP_TIMEOUT_INFINITE) to disable the EC sleep 71 failure detection mechanism. Values in between 0 and 65535 72 indicate the number of milliseconds the EC should wait after a 73 sleep transition before declaring a timeout. This includes both 74 the duration after a sleep command was received but before the 75 hardware line changed, as well as the duration between when the 76 hardware line changed and the kernel sent an EC resume command. 77 78 Output will be in the format: "%u\n".
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