drivers/intel/gma/acpi: Add Kconfigs for backlight registers
Instead of adding more versions of the `*pch.asl`, unify the existing
ones and allow to override the register locations via Kconfig. The
current defaults should work for Skylake and some newer platforms.
TEST=Booted ThinkPad X201s, backlight control still works.
Change-Id: I0b21d9a0288f0f8d6cb0a4776909bffdae7576f5
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31503
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Wim Vervoorn <wvervoorn@eltan.com>
Reviewed-by: Benjamin Doron <benjamin.doron00@gmail.com>
diff --git a/src/northbridge/intel/sandybridge/Kconfig b/src/northbridge/intel/sandybridge/Kconfig
index a9bbf58..29a6db7 100644
--- a/src/northbridge/intel/sandybridge/Kconfig
+++ b/src/northbridge/intel/sandybridge/Kconfig
@@ -121,4 +121,7 @@
endif # !USE_NATIVE_RAMINIT
+config INTEL_GMA_BCLV_OFFSET
+ default 0x48254
+
endif