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| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2008-02-16 04:17:58 (GMT) |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-16 05:34:06 (GMT) |
| commit | 6c231bd5eb07ce546517019f334652b9ecfc329a (patch) | |
| tree | 4fcb81f506a0a6591e2a5870fce855bbc2582291 /Documentation/laptops | |
| parent | d147da73c9a3f617e4685c6a7762961fe19833e7 (diff) | |
| download | linux-6c231bd5eb07ce546517019f334652b9ecfc329a.tar.xz | |
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>
Diffstat (limited to 'Documentation/laptops')
| -rw-r--r-- | Documentation/laptops/thinkpad-acpi.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt index 606af16..76cb428 100644 --- a/Documentation/laptops/thinkpad-acpi.txt +++ b/Documentation/laptops/thinkpad-acpi.txt @@ -313,6 +313,13 @@ sysfs notes: This attribute has poll()/select() support. + hotkey_tablet_mode: + If the ThinkPad has tablet capabilities, this attribute + will read 0 if the ThinkPad is in normal mode, and + 1 if the ThinkPad is in tablet mode. + + This attribute has poll()/select() support. + hotkey_report_mode: Returns the state of the procfs ACPI event report mode filter for hot keys. If it is set to 1 (the default), |