platform/x86: add MXM WMI driver.

MXM is a laptop graphics card form-factor + interface specification,
this adds an initial stub driver to talk to the MXM WMI interface.

The only method used is the MUX switching method needed to do switchable
graphics on the nvidia chipsets.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Acked-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 0485e394712a..94914572dd7f 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -753,4 +753,11 @@ config SAMSUNG_LAPTOP
           To compile this driver as a module, choose M here: the module
           will be called samsung-laptop.
 
+config MXM_WMI
+       tristate "WMI support for MXM Laptop Graphics"
+       depends on WMI
+       ---help---
+          MXM is a standard for laptop graphics cards, the WMI interface
+          is required for switchable nvidia graphics machines
+
 endif # X86_PLATFORM_DEVICES