diff options
Diffstat (limited to 'drivers/acpi/arm64')
| -rw-r--r-- | drivers/acpi/arm64/Makefile | 1 | ||||
| -rw-r--r-- | drivers/acpi/arm64/thermal_cpufreq.c | 22 |
2 files changed, 23 insertions, 0 deletions
diff --git a/drivers/acpi/arm64/Makefile b/drivers/acpi/arm64/Makefile index 143debc1ba4a..726944648c9b 100644 --- a/drivers/acpi/arm64/Makefile +++ b/drivers/acpi/arm64/Makefile @@ -5,3 +5,4 @@ obj-$(CONFIG_ACPI_GTDT) += gtdt.o obj-$(CONFIG_ACPI_APMT) += apmt.o obj-$(CONFIG_ARM_AMBA) += amba.o obj-y += dma.o init.o +obj-y += thermal_cpufreq.o diff --git a/drivers/acpi/arm64/thermal_cpufreq.c b/drivers/acpi/arm64/thermal_cpufreq.c new file mode 100644 index 000000000000..582854914c5c --- /dev/null +++ b/drivers/acpi/arm64/thermal_cpufreq.c @@ -0,0 +1,22 @@ +// SPDX-License-Identifier: GPL-2.0-only +#include <linux/acpi.h> +#include <linux/export.h> + +#include "../internal.h" + +#define SMCCC_SOC_ID_T241 0x036b0241 + +int acpi_arch_thermal_cpufreq_pctg(void) +{ + s32 soc_id = arm_smccc_get_soc_id_version(); + + /* + * Check JEP106 code for NVIDIA Tegra241 chip (036b:0241) and + * reduce the CPUFREQ Thermal reduction percentage to 5%. + */ + if (soc_id == SMCCC_SOC_ID_T241) + return 5; + + return 0; +} +EXPORT_SYMBOL_GPL(acpi_arch_thermal_cpufreq_pctg); |