ACPI: thinkpad-acpi: add bluetooth and WWAN rfkill support

Add a read/write rfkill interface to the bluetooth radio switch on the
bluetooth submodule, and one for the wireless wan radio switch to the wan
submodule.

Since rfkill does care for when a switch changes state, use WLSW
notifications to also check if the WWAN or Bluetooth switches did not
change state (due to them being slaves of WLSW in firmware/hardware, but
that reality not being always properly exported by the thinkpad firmware).

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Ivo van Doorn <IvDoorn@gmail.com>
Cc: John W. Linville <linville@tuxdriver.com>

1 files changed, 16 insertions, 6 deletions

diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index 64b3f146e4b..1c1c0217ebd 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -621,7 +621,8 @@ Bluetooth
 ---------
 
 procfs: /proc/acpi/ibm/bluetooth
-sysfs device attribute: bluetooth_enable
+sysfs device attribute: bluetooth_enable (deprecated)
+sysfs rfkill class: switch "tpacpi_bluetooth_sw"
 
 This feature shows the presence and current state of a ThinkPad
 Bluetooth device in the internal ThinkPad CDC slot.
@@ -643,8 +644,12 @@ Sysfs notes:
                 0: disables Bluetooth / Bluetooth is disabled
                 1: enables Bluetooth / Bluetooth is enabled.
 
-        Note: this interface will be probably be superseded by the
-        generic rfkill class, so it is NOT to be considered stable yet.
+        Note: this interface has been superseded by the generic rfkill
+        class.  It has been deprecated, and it will be removed in year
+        2010.
+
+        rfkill controller switch "tpacpi_bluetooth_sw": refer to
+        Documentation/rfkill.txt for details.
 
 Video output control -- /proc/acpi/ibm/video
 --------------------------------------------
@@ -1374,7 +1379,8 @@ EXPERIMENTAL: WAN
 -----------------
 
 procfs: /proc/acpi/ibm/wan
-sysfs device attribute: wwan_enable
+sysfs device attribute: wwan_enable (deprecated)
+sysfs rfkill class: switch "tpacpi_wwan_sw"
 
 This feature is marked EXPERIMENTAL because the implementation
 directly accesses hardware registers and may not work as expected. USE
@@ -1404,8 +1410,12 @@ Sysfs notes:
                 0: disables WWAN card / WWAN card is disabled
                 1: enables WWAN card / WWAN card is enabled.
 
-        Note: this interface will be probably be superseded by the
-        generic rfkill class, so it is NOT to be considered stable yet.
+        Note: this interface has been superseded by the generic rfkill
+        class.  It has been deprecated, and it will be removed in year
+        2010.
+
+        rfkill controller switch "tpacpi_wwan_sw": refer to
+        Documentation/rfkill.txt for details.
 
 Multiple Commands, Module Parameters
 ------------------------------------