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authorGraeme Gregory <graeme.gregory@linaro.org>2014-07-18 14:02:52 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-07-21 15:50:58 +0400
commit8a1664be0b922dd6afd60eca96a992ef5ec22c40 (patch)
tree3183bc4dad47bb9407236697dee8526455878e0b /drivers/acpi
parent9a3c4145af32125c5ee39c0272662b47307a8323 (diff)
downloadlinux-8a1664be0b922dd6afd60eca96a992ef5ec22c40.tar.xz
ACPI: add config for BIOS table scan
With the addition of ARM64 that does not have a traditional BIOS to scan, add a config option which is selected on x86 (ia64 doesn't need it either, it is EFI/UEFI based system) to do the traditional BIOS scanning for tables. Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/Kconfig3
-rw-r--r--drivers/acpi/osl.c4
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index a34a22841002..970524c54bfa 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -42,6 +42,9 @@ menuconfig ACPI
if ACPI
+config ACPI_LEGACY_TABLES_LOOKUP
+ bool
+
config ACPI_SLEEP
bool
depends on SUSPEND || HIBERNATION
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index bad25b070fe0..3abe9b223ba7 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -259,12 +259,14 @@ acpi_physical_address __init acpi_os_get_root_pointer(void)
"System description tables not found\n");
return 0;
}
- } else {
+ } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
acpi_physical_address pa = 0;
acpi_find_root_pointer(&pa);
return pa;
}
+
+ return 0;
}
/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */