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Diffstat (limited to 'drivers/acpi/arm64/thermal_cpufreq.c')
-rw-r--r--drivers/acpi/arm64/thermal_cpufreq.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/acpi/arm64/thermal_cpufreq.c b/drivers/acpi/arm64/thermal_cpufreq.c
new file mode 100644
index 0000000000..582854914c
--- /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);