misc: add HP WMI laptop extras driver

This driver adds support for reading and configuring certain information
on modern HP laptops with WMI BIOS interfaces.  It supports enabling and
disabling the ambient light sensor, querying attached displays and hard
drive temperature, sending events on docking and querying the state of the
dock and toggling the state of the wifi, bluetooth and wwan hardware via
rfkill.  It also makes the little "(i)" button work on machines that send
that via WMI rather than via the keyboard controller.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/misc/Kconfig

@@ -212,6 +212,18 @@ config TC1100_WMI
 	  This is a driver for the WMI extensions (wireless and bluetooth power
 	  control) of the HP Compaq TC1100 tablet.
 
+config HP_WMI
+       tristate "HP WMI extras"
+       depends on ACPI_WMI
+       depends on INPUT
+       depends on RFKILL
+       help
+         Say Y here if you want to support WMI-based hotkeys on HP laptops and
+	 to read data from WMI such as docking or ambient light sensor state.
+
+         To compile this driver as a module, choose M here: the module will
+         be called hp-wmi.
+
 config MSI_LAPTOP
         tristate "MSI Laptop Extras"
         depends on X86

drivers/misc/Makefile

@@ -13,6 +13,7 @@ obj-$(CONFIG_ACER_WMI)		+= acer-wmi.o
 obj-$(CONFIG_ATMEL_PWM)		+= atmel_pwm.o
 obj-$(CONFIG_ATMEL_SSC)		+= atmel-ssc.o
 obj-$(CONFIG_ATMEL_TCLIB)	+= atmel_tclib.o
+obj-$(CONFIG_HP_WMI)		+= hp-wmi.o
 obj-$(CONFIG_TC1100_WMI)	+= tc1100-wmi.o
 obj-$(CONFIG_LKDTM)		+= lkdtm.o
 obj-$(CONFIG_TIFM_CORE)       	+= tifm_core.o