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Diffstat (limited to 'kernel/Documentation/ABI/testing/debugfs-ec')
| -rw-r--r-- | kernel/Documentation/ABI/testing/debugfs-ec | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/Documentation/ABI/testing/debugfs-ec b/kernel/Documentation/ABI/testing/debugfs-ec new file mode 100644 index 000000000..6546115a9 --- /dev/null +++ b/kernel/Documentation/ABI/testing/debugfs-ec @@ -0,0 +1,20 @@ +What: /sys/kernel/debug/ec/*/{gpe,use_global_lock,io} +Date: July 2010 +Contact: Thomas Renninger <trenn@suse.de> +Description: + +General information like which GPE is assigned to the EC and whether +the global lock should get used. +Knowing the EC GPE one can watch the amount of HW events related to +the EC here (XY -> GPE number from /sys/kernel/debug/ec/*/gpe): +/sys/firmware/acpi/interrupts/gpeXY + +The io file is binary and a userspace tool located here: +ftp://ftp.suse.com/pub/people/trenn/sources/ec/ +should get used to read out the 256 Embedded Controller registers +or writing to them. + +CAUTION: Do not write to the Embedded Controller if you don't know +what you are doing! Rebooting afterwards also is a good idea. +This can influence the way your machine is cooled and fans may +not get switched on again after you did a wrong write. |