src/mainboard/google/stout/acpi/thermal.asl

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 // Thermal Zone
   4
   5 External (\PPKG, MethodObj)
   6
   7 #define HAVE_THERMALZONE
   8 Scope (\_TZ)
   9 {
  10         ThermalZone (THRM)
  11         {
  12                 Name (_TC1, 0x02)
  13                 Name (_TC2, 0x03)
  14
  15                 // Thermal zone polling frequency: 10 seconds
  16                 Name (_TZP, 100)
  17
  18                 // Thermal sampling period for passive cooling: 10 seconds
  19                 Name (_TSP, 100)
  20
  21                 // Convert from Degrees C to 1/10 Kelvin for ACPI
  22                 Method (CTOK, 1)
  23                 {
  24                         // 10th of Degrees C
  25                         Local0 = Arg0 * 10
  26
  27                         // Convert to Kelvin
  28                         Local0 += 2732
  29
  30                         Return (Local0)
  31                 }
  32
  33                 // Threshold for OS to shutdown
  34                 Method (_CRT, 0, Serialized)
  35                 {
  36                         Return (CTOK (\TCRT))
  37                 }
  38
  39                 // Threshold for passive cooling
  40                 Method (_PSV, 0, Serialized)
  41                 {
  42                         Return (CTOK (\TPSV))
  43                 }
  44
  45                 // Processors used for passive cooling
  46                 Method (_PSL, 0, Serialized)
  47                 {
  48                         Return (\PPKG ())
  49                 }
  50
  51                 Method (_TMP, 0, Serialized)
  52                 {
  53                         // Returns Higher of the two readings for CPU & VGA Temperature
  54                         If (\_SB.PCI0.LPCB.EC0.TMP2 > \_SB.PCI0.LPCB.EC0.TMP1)
  55                         {
  56                                 // CPU high temperature
  57                                 Local0 = \_SB.PCI0.LPCB.EC0.TMP2
  58                         }
  59                         Else
  60                         {
  61                                 // VGA high temperature
  62                                 Local0 = \_SB.PCI0.LPCB.EC0.TMP1
  63                         }
  64
  65                         // If temp less 35 or great then 115, set default 35
  66                         If ((Local0 < 35) | (Local0 > 115))
  67                         {
  68                                 Local0 = 35
  69                         }
  70
  71                         Return (CTOK (Local0))
  72                 }
  73         }
  74 }