[coreboot-gerrit] New patch to review for coreboot: e70fc6a Avoid tripping overheat alarm on X201 before ME boots

[Vladimir Serbinenko (phcoder@gmail.com)]

Vladimir Serbinenko (phcoder at gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3404

-gerrit

commit e70fc6a62fc54b89714b78bc6685cc370857ee3f
Author: Vladimir Serbinenko <phcoder at gmail.com>
Date:   Fri Jun 7 01:34:06 2013 +0200

    Avoid tripping overheat alarm on X201 before ME boots
    
    Until ME boots (which takes seconds on X201) the reported temperature
    is 128 °C which triggers Linux overheat alarm which shuts down.
    Pretend temperature is 40°C until ME boots.
    
    Change-Id: Ia49fa03c6eb27f539a23711f2c8ebfde72b1dc18
    Signed-off-by: Vladimir Serbinenko <phcoder at gmail.com>
---
 src/ec/lenovo/h8/acpi/thermal.asl | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/ec/lenovo/h8/acpi/thermal.asl b/src/ec/lenovo/h8/acpi/thermal.asl
index 35b6f14..d9cf459 100644
--- a/src/ec/lenovo/h8/acpi/thermal.asl
+++ b/src/ec/lenovo/h8/acpi/thermal.asl
@@ -1,5 +1,9 @@
 Scope(\_TZ)
 {
+#if defined (CONFIG_BOARD_LENOVO_X201) && CONFIG_BOARD_LENOVO_X201
+	Name (MEBT, 0)
+#endif
+
 	Method(C2K, 1, NotSerialized)
 	{
 		Multiply(Arg0, 10, Local0)
@@ -20,6 +24,13 @@ Scope(\_TZ)
 			Return (C2K(127))
 		}
 		Method(_TMP) {
+#if defined (CONFIG_BOARD_LENOVO_X201) && CONFIG_BOARD_LENOVO_X201
+		        /* Avoid tripping alarm if ME isn't booted at all yet */
+		        If (LAnd (LNot (MEBT), LEqual (\_SB.PCI0.LPCB.EC.TMP0, 128))) {
+                            Return (C2K(40))
+                        }
+#endif
+			Store (1, MEBT)
 			Return (C2K(\_SB.PCI0.LPCB.EC.TMP0))
 		}
 	}