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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2007-07-18 23:45:29 -0300
committerLen Brown <len.brown@intel.com>2007-07-21 23:37:50 -0400
commitae92bd17ff703b3703562148c73b4d6833e6a326 (patch)
tree8e987e553f7c4d4a54be326e2b5310c32a6c1faf /Documentation/cpu-load.txt
parentb8b26402cb711de5d3bbd4515b91b6d863fea259 (diff)
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ACPI: thinkpad-acpi: enable more hotkeys
Revise ACPI HKEY functionality to better interface with the firmware, and enable up to 32 regular hotkeys, instead of just 16 of them. Ouch. This takes care of most keys one used to have to do CMOS NVRAM polling on, and should drop the need for tpb, thinkpad-keys, and other such 5Hz NVRAM polling power vampires on most modern ThinkPads ;-) And, just to add insult to injury, this was sort of working since forever through the procfs interface, but nobody noticed or tried an echo 0xffffffff > /proc/acpi/ibm/hotkey and told me it would generate weird events. ARGH! Thanks to Richard Hughes for kicking off the work that ended up with this discovery, and to Matthew Garret for calling my attention to the fact that newer ThinkPads were indeed generating ACPI GPEs when such hot keys were pressed. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: Richard Hughes <hughsient@gmail.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Signed-off-by: Len Brown <len.brown@intel.com>
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