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-rw-r--r--src/mainboard/lenovo/t400/cstates.c5
-rw-r--r--src/mainboard/lenovo/t400/devicetree.cb2
2 files changed, 6 insertions, 1 deletions
diff --git a/src/mainboard/lenovo/t400/cstates.c b/src/mainboard/lenovo/t400/cstates.c
index 3ce2ed1a81..175153ebd4 100644
--- a/src/mainboard/lenovo/t400/cstates.c
+++ b/src/mainboard/lenovo/t400/cstates.c
@@ -28,6 +28,11 @@ static acpi_cstate_t cst_entries[] = {
2, 0x01, 500,
{ ACPI_ADDRESS_SPACE_FIXED, 1, 2, { 1 }, 0x10, 0 }
},
+ {
+ /* acpi C3 / cpu C3 */
+ 3, 0x37, 250,
+ { ACPI_ADDRESS_SPACE_FIXED, 1, 2, { 1 }, 0x20, 0 }
+ },
};
int get_cst_entries(acpi_cstate_t **entries)
diff --git a/src/mainboard/lenovo/t400/devicetree.cb b/src/mainboard/lenovo/t400/devicetree.cb
index 43a610ab5f..6bf25fab38 100644
--- a/src/mainboard/lenovo/t400/devicetree.cb
+++ b/src/mainboard/lenovo/t400/devicetree.cb
@@ -63,7 +63,7 @@ chip northbridge/intel/gm45
register "sata_traffic_monitor" = "0"
# Set c-state support
- register "c4onc3_enable" = "0"
+ register "c4onc3_enable" = "1"
register "c5_enable" = "1"
register "c6_enable" = "1"