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platform/x86: thinkpad_acpi: Add support for X1 Yoga (2016) Tablet Mode

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For whatever reason, the X1 Yoga doesn't support the normal method of
querying for tablet mode. Instead of providing the MHKG method under the
hotkey handle, we're instead given the CMMD method under the EC handle.
Values on this handle are either 0x1, laptop mode, or 0x6, tablet mode.

Tested-by: Daniel Martin <[email protected]>
Signed-off-by: Lyude <[email protected]>
Signed-off-by: Darren Hart <[email protected]>
This commit is contained in:
Lyude 2016-11-11 15:15:03 -05:00 • committed by Darren Hart
commit b03f4d4946
2 changed files with 36 additions and 4 deletions
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1
Documentation/laptops/thinkpad-acpi.txt
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@ -540,6 +540,7 @@ Events that are propagated by the driver to userspace:
0x6022 ALARM: a sensor is extremely hot
0x6030 System thermal table changed
0x6040 Nvidia Optimus/AC adapter related (TO BE VERIFIED)
0x60C0 X1 Yoga 2016, Tablet mode status changed
Battery nearly empty alarms are a last resort attempt to get the
operating system to hibernate or shutdown cleanly (0x2313), or shutdown