src/mainboard/roda/rk9/acpi/thermal.asl

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 // Thermal Zone
   4
   5 Scope (\_TZ)
   6 {
   7         /* degree Celsius to deci-Kelvin (ACPI temperature unit) */
   8         Method(C2dK, 1) {
   9                 Local0 = 2732 + Arg0 * 10
  10                 Return (Local0)
  11         }
  12
  13         ThermalZone (THRM)
  14         {
  15
  16                 // FIXME these could/should be read from the
  17                 // GNVS area, so they can be controlled by
  18                 // coreboot
  19                 Name(TC1V, 0x04)
  20                 Name(TC2V, 0x03)
  21                 Name(TSPV, 0x96)
  22
  23                 // At which temperature should the OS start
  24                 // active cooling?
  25                 Method (_AC0, 0, Serialized)
  26                 {
  27                         Return (C2dK(120)) // Value for Rocky
  28                 }
  29
  30                 // Critical shutdown temperature
  31                 Method (_CRT, 0, Serialized)
  32                 {
  33                         Return (C2dK(155)) // Value for Rocky
  34                 }
  35
  36                 // CPU throttling start temperature
  37                 Method (_PSV, 0, Serialized)
  38                 {
  39                         Return (C2dK(105)) // Value for Rocky
  40                 }
  41
  42                 // Get DTS Temperature
  43                 Method (_TMP, 0, Serialized)
  44                 {
  45                         If (\_SB.PCI0.LPCB.EC0.ALRC) {
  46                                 \_SB.PCI0.LPCB.EC0.ALRC = 0
  47                                 Return(_AC0())
  48                         }
  49
  50                         If (\_SB.PCI0.LPCB.EC0.ALRL) {
  51                                 THRO = 0
  52                                 \_SB.PCI0.LPCB.EC0.ALRL = 0
  53                         }
  54
  55                         If (\_SB.PCI0.LPCB.EC0.ALRH) {
  56                                 THRO = 1
  57                                 \_SB.PCI0.LPCB.EC0.ALRH = 0
  58                         }
  59
  60                         /* vendor BIOS reports 0K if TCPU >= 128 deg C ?!? */
  61                         Return (C2dK(\_SB.PCI0.LPCB.EC0.TCPU))
  62                 }
  63
  64
  65                 // Processors used for active cooling
  66                 Method (_PSL, 0, Serialized)
  67                 {
  68                         If (MPEN) {
  69                                 Return (Package() {\_SB.CP00, \_SB.CP01})
  70                         }
  71                         Return (Package() {\_SB.CP00})
  72                 }
  73
  74                 // TC1 value for passive cooling
  75                 Method (_TC1, 0, Serialized)
  76                 {
  77                         Return (TC1V)
  78                 }
  79
  80                 // TC2 value for passive cooling
  81                 Method (_TC2, 0, Serialized)
  82                 {
  83                         Return (TC2V)
  84                 }
  85
  86                 // Sampling period for passive cooling
  87                 Method (_TSP, 0, Serialized)
  88                 {
  89                         Return (TSPV)
  90                 }
  91
  92
  93         }
  94 }