New patch to review for coreboot: 7fcec93 Lenovo X60: dsdt.asl: Add _OSC method

[Denis Carikli]

Denis Carikli ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2938

-gerrit

commit 7fcec935efe0c93c60bcb92693dfdc7918a07b5d
Author: Denis 'GNUtoo' Carikli 
Date:   Thu Mar 28 14:24:39 2013 +0100

Lenovo X60: dsdt.asl: Add _OSC method

This commit was modelled after the following commit:
      00a0e76bc5ffaba01c98f1c1384b0499516fdaef
      (AMD Fam14 DSDT: Add OSC method)

Tested under the parabola GNU/Linux distribution:
    $ dmesg | grep _OSC
    [    0.107867] pci_root PNP0A08:00: Requesting ACPI _OSC control (0x1d)
    [    0.107894] pci_root PNP0A08:00: ACPI _OSC control (0x1d) granted

Change-Id: I1caffa44eea447d553c01caaf431f2db241ea5ea
    Signed-off-by: Denis 'GNUtoo' Carikli 
---
 src/mainboard/lenovo/x60/dsdt.asl | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/mainboard/lenovo/x60/dsdt.asl b/src/mainboard/lenovo/x60/dsdt.asl
index f32a220..ac7fbf9 100644
--- a/src/mainboard/lenovo/x60/dsdt.asl
+++ b/src/mainboard/lenovo/x60/dsdt.asl
@@ -45,6 +45,16 @@ DefinitionBlock(
    	{
    		#include <northbridge/intel/i945/acpi/i945.asl>
    		#include <southbridge/intel/i82801gx/acpi/ich7.asl>
+
+			/* Operating System Capabilities Method */
+			Method(_OSC,4)
+			{	/* Check for proper PCI/PCIe UUID */
+				If(LEqual(Arg0,ToUUID("33DB4D5B-1FF7-401C-9657-7441C03DD766")))
+				{
+					/* Let OS control everything */
+					Return (Arg3)
+				}
+			}
    	}
    }