| commit | 6c231bd5eb07ce546517019f334652b9ecfc329a | |
| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | |
| Sat, 16 Feb 2008 04:17:58 +0000 (16 02:17 -0200) | ||
| committer | Len Brown <len.brown@intel.com> | |
| Sat, 16 Feb 2008 05:34:06 +0000 (16 00:34 -0500) | ||
| tree | 4fcb81f506a0a6591e2a5870fce855bbc2582291 | treesnapshot (tar.gz zip) |
| parent | d147da73c9a3f617e4685c6a7762961fe19833e7 | commitdiff |
ACPI: thinkpad-acpi: add tablet-mode reporting
A quick study of the 0x5009/0x500A HKEY event on the X61t DSDT revealed the
existence of the EC HTAB register (EC 0x0f, bit 7), and a compare with the
X41t DSDT shows that HKEY.MHKG can be used to verify if the ThinkPad is
tablet-capable (MHKG present), and in tablet mode (bit 3 of MHKG return is
set).
Add an attribute to report this information, "hotkey_tablet_mode". This
attribute has poll()/select() support, and can be used along with EV_SW
SW_TABLET_MODE to hook userspace to tablet events.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
A quick study of the 0x5009/0x500A HKEY event on the X61t DSDT revealed the
existence of the EC HTAB register (EC 0x0f, bit 7), and a compare with the
X41t DSDT shows that HKEY.MHKG can be used to verify if the ThinkPad is
tablet-capable (MHKG present), and in tablet mode (bit 3 of MHKG return is
set).
Add an attribute to report this information, "hotkey_tablet_mode". This
attribute has poll()/select() support, and can be used along with EV_SW
SW_TABLET_MODE to hook userspace to tablet events.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
| Documentation/laptops/thinkpad-acpi.txt | diffblobblamehistory | |
| drivers/misc/thinkpad_acpi.c | diffblobblamehistory |