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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@gmail.com>
Reviewed-on: http://review.coreboot.org/3404
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Vladimir Serbinenko 2013-06-07 01:34:06 +02:00 committed by Ronald G. Minnich
parent fe50d0bcfe
commit 26419285bf
1 changed files with 11 additions and 0 deletions
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11
src/ec/lenovo/h8/acpi/thermal.asl
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@ -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))
}
Store (1, MEBT)
#endif
Return (C2K(\_SB.PCI0.LPCB.EC.TMP0))
}
}