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-rw-r--r--src/acpi/acpi.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/acpi/acpi.c b/src/acpi/acpi.c
index f8994eb9e9..fb9a758fb0 100644
--- a/src/acpi/acpi.c
+++ b/src/acpi/acpi.c
@@ -1689,6 +1689,10 @@ void acpi_create_fadt(acpi_fadt_t *fadt, acpi_facs_t *facs, void *dsdt)
fadt->p_lvl2_lat = ACPI_FADT_C2_NOT_SUPPORTED;
fadt->p_lvl3_lat = ACPI_FADT_C3_NOT_SUPPORTED;
+ /* Use CPU _PTC instead to provide P_CNT details. */
+ fadt->duty_offset = 0;
+ fadt->duty_width = 0;
+
fadt->preferred_pm_profile = acpi_get_preferred_pm_profile();
if (CONFIG(USE_PC_CMOS_ALTCENTURY))