ACPI: thinkpad-acpi: add X61t HKEY events

Tomas Carnecky reports that events 0x5009 and 0x500a are swivel events, and
that 0x500b/0x500c are tablet pen storage bay events.

Document these events, and avoid nasty messages when they happen.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 9b0235dc5308..049ec42c77be 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -2127,10 +2127,13 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
                         }
                         break;
                 case 5:
-                        /* 0x5000-0x5FFF: On screen display helpers */
+                        /* 0x5000-0x5FFF: human interface helpers */
                         switch (hkey) {
-                        case 0x5010:
-                                /* Lenovo Vista BIOS: brightness changed */
+                        case 0x5010: /* Lenovo new BIOS: brightness changed */
+                        case 0x5009: /* X61t: swivel up (tablet mode) */
+                        case 0x500a: /* X61t: swivel down (normal mode) */
+                        case 0x500b: /* X61t: tablet pen inserted into bay */
+                        case 0x500c: /* X61t: tablet pen removed from bay */
                                 break;
                         case 0x5001:
                         case 0x5002: