From 6c231bd5eb07ce546517019f334652b9ecfc329a Mon Sep 17 00:00:00 2001 From: Henrique de Moraes Holschuh Date: Sat, 16 Feb 2008 02:17:58 -0200 Subject: 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 Signed-off-by: Len Brown --- Documentation/laptops/thinkpad-acpi.txt | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'Documentation/laptops') diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt index 606af1628382..76cb428435da 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), -- cgit v1.2.2