Toshiba laptops enable special functionality via an ACPI device. This

driver handles that, and will be maintained by John Belmonte.

MAINTAINERS

@@ -1590,6 +1590,12 @@ L:	linux-tr@linuxtr.net
 W:	http://www.linuxtr.net
 S:	Maintained
 
+TOSHIBA ACPI EXTRAS DRIVER
+P:	John Belmonte
+M:	toshiba_acpi@memebeam.org
+W:	http://memebeam.org/toys/ToshibaAcpiDriver
+S:	Maintained
+
 TOSHIBA SMM DRIVER
 P:	Jonathan Buzzard
 M:	jonathan@buzzard.org.uk

drivers/acpi/Config.help

@@ -91,3 +91,25 @@ CONFIG_ACPI_DEBUG
   of verbosity. Saying Y enables these statements. This will increase
   your kernel size by around 50K.
 
+CONFIG_ACPI_TOSHIBA
+  This driver adds support for access to certain system settings
+  on "legacy free" Toshiba laptops.  These laptops can be recognized by
+  their lack of a BIOS setup menu and APM support.
+
+  On these machines, all system configuration is handled through the
+  ACPI.  This driver is required for access to controls not covered
+  by the general ACPI drivers, such as LCD brightness, video output,
+  etc.
+
+  This driver differs from the non-ACPI Toshiba laptop driver (located
+  under "Processor type and features") in several aspects.
+  Configuration is accessed by reading and writing text files in the
+  /proc tree instead of by program interface to /dev.  Furthermore, no
+  power management functions are exposed, as those are handled by the
+  general ACPI drivers.
+
+  More information about this driver is available at
+  <http://memebeam.org/toys/ToshibaAcpiDriver>.
+
+  If you have a legacy free Toshiba laptop (such as the Libretto L1
+  series), say Y.

drivers/acpi/Config.in

@@ -31,6 +31,7 @@ if [ "$CONFIG_X86" = "y" ]; then
       tristate     '  Fan'		CONFIG_ACPI_FAN
       tristate     '  Processor'	CONFIG_ACPI_PROCESSOR
       dep_tristate '  Thermal Zone' 	CONFIG_ACPI_THERMAL $CONFIG_ACPI_PROCESSOR
+      tristate     '  Toshiba Laptop Extras'	CONFIG_ACPI_TOSHIBA
       bool         '  Debug Statements'	CONFIG_ACPI_DEBUG
     fi
   fi

drivers/acpi/Makefile

@@ -43,5 +43,6 @@ obj-$(CONFIG_ACPI_POWER)	+= power.o
 obj-$(CONFIG_ACPI_PROCESSOR)	+= processor.o
 obj-$(CONFIG_ACPI_THERMAL)	+= thermal.o
 obj-$(CONFIG_ACPI_SYSTEM)	+= system.o
+obj-$(CONFIG_ACPI_TOSHIBA)	+= toshiba_acpi.o
 
 include $(TOPDIR)/Rules.make