x86, olpc: Rework BIOS signature check

The XO-1.5 laptop is not currently detected as an OLPC machine because
it fails this XO-1-centric check.

Now that we have OLPC OFW support in the kernel, a more sensible
check is to see if we found OFW during boot and check the architecture
property.

Also remove a now-meaningless codepath, as we're always going to have
OFW support with OLPC.

Signed-off-by: Daniel Drake <dsd@laptop.org>
LKML-Reference: <20100923162846.D8D409D401B@zog.reactivated.net>
Cc: Andres Salomon <dilinger@queued.net>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0ed4c9bfcd13..c25525571347 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2061,6 +2061,7 @@ config SCx200HR_TIMER
 config OLPC
         bool "One Laptop Per Child support"
         select GPIOLIB
+        select OLPC_OPENFIRMWARE
         ---help---
           Add support for detecting the unique features of the OLPC
           XO hardware.
@@ -2068,7 +2069,7 @@ config OLPC
 config OLPC_OPENFIRMWARE
         bool "Support for OLPC's Open Firmware"
         depends on !X86_64 && !X86_PAE
-        default y if OLPC
+        default n
         help
           This option adds support for the implementation of Open Firmware
           that is used on the OLPC XO-1 Children's Machine.