1 What: /sys/kernel/debug/ec/*/{gpe,use_global_lock,io}
2 Date: July 2010
3 Contact: Thomas Renninger <trenn@suse.de>
4 Description:
5
6 General information like which GPE is assigned to the EC and whether
7 the global lock should get used.
8 Knowing the EC GPE one can watch the amount of HW events related to
9 the EC here (XY -> GPE number from `/sys/kernel/debug/ec/*/gpe`):
10 /sys/firmware/acpi/interrupts/gpeXY
11
12 The io file is binary and a userspace tool located here:
13 ftp://ftp.suse.com/pub/people/trenn/sources/ec/
14 should get used to read out the 256 Embedded Controller registers
15 or writing to them.
16
17 CAUTION:
18 Do not write to the Embedded Controller if you don't know
19 what you are doing! Rebooting afterwards also is a good idea.
20 This can influence the way your machine is cooled and fans may
21 not get switched on again after you did a wrong write.
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