drivers/acpi/arm64/thermal_cpufreq.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 #include <linux/acpi.h>
   3 #include <linux/export.h>
   4
   5 #include "../internal.h"
   6
   7 #define SMCCC_SOC_ID_T241      0x036b0241
   8
   9 int acpi_arch_thermal_cpufreq_pctg(void)
  10 {
  11         s32 soc_id = arm_smccc_get_soc_id_version();
  12
  13         /*
  14          * Check JEP106 code for NVIDIA Tegra241 chip (036b:0241) and
  15          * reduce the CPUFREQ Thermal reduction percentage to 5%.
  16          */
  17         if (soc_id == SMCCC_SOC_ID_T241)
  18                 return 5;
  19
  20         return 0;
  21 }
  22 EXPORT_SYMBOL_GPL(acpi_arch_thermal_cpufreq_pctg);