src/mainboard/hp/pro_3500_series/mainboard.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <cpu/intel/model_206ax/model_206ax.h>
   4 #include <cpu/x86/msr.h>
   5 #include <device/device.h>
   6 #include <static_devices.h>
   7 #include <superio/ite/it8772f/chip.h>
   8
   9 static u8 cpu_get_temp_offset(void)
  10 {
  11         msr_t msr = rdmsr(MSR_TEMPERATURE_TARGET);
  12         u8 tj_max = (msr.lo >> 16) & 0xFF;
  13         u8 tcc_offset = (msr.lo >> 24) & 0xf;
  14
  15         msr = rdmsr(MSR_PLATFORM_INFO);
  16         if (msr.lo & (1 << 30)) {
  17                 return tj_max - tcc_offset;
  18         } else {
  19                 return tj_max;
  20         }
  21 }
  22
  23 static void mainboard_enable(struct device *dev)
  24 {
  25         /* Set PECI TMPIN 3 offset to TJ_MAX temperature */
  26         struct superio_ite_it8772f_config *const config = __pnp_002e_04->chip_info;
  27         if (config)
  28                 config->ec.tmpin[2].offset = cpu_get_temp_offset();
  29 }
  30
  31 struct chip_operations mainboard_ops = {
  32         .enable_dev = mainboard_enable,
  33 };