Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/Documentation/ABI/testing/debugfs-cros-ec b/Documentation/ABI/testing/debugfs-cros-ec
new file mode 100644
index 0000000..1fe0add
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+++ b/Documentation/ABI/testing/debugfs-cros-ec
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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".