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-rw-r--r--src/mainboard/lenovo/t420s/cmos.default1
-rw-r--r--src/mainboard/lenovo/t420s/cmos.layout5
-rw-r--r--src/mainboard/lenovo/t420s/smihandler.c2
3 files changed, 7 insertions, 1 deletions
diff --git a/src/mainboard/lenovo/t420s/cmos.default b/src/mainboard/lenovo/t420s/cmos.default
index 0fc3e553f6..d1fbcf6b27 100644
--- a/src/mainboard/lenovo/t420s/cmos.default
+++ b/src/mainboard/lenovo/t420s/cmos.default
@@ -14,3 +14,4 @@ fn_ctrl_swap=Disable
sticky_fn=Disable
trackpoint=Enable
hybrid_graphics_mode=Integrated Only
+usb_always_on=Disable \ No newline at end of file
diff --git a/src/mainboard/lenovo/t420s/cmos.layout b/src/mainboard/lenovo/t420s/cmos.layout
index e9e582db71..73a0b4bcba 100644
--- a/src/mainboard/lenovo/t420s/cmos.layout
+++ b/src/mainboard/lenovo/t420s/cmos.layout
@@ -69,7 +69,7 @@ entries
418 1 e 1 sticky_fn
419 1 e 1 power_management_beeps
421 1 e 9 sata_mode
-#422 2 r 1 unused
+422 2 e 13 usb_always_on
# coreboot config options: cpu
#424 8 r 0 unused
@@ -137,6 +137,9 @@ enumerations
11 6 224M
12 0 Integrated Only
12 1 Discrete Only
+13 0 Disable
+13 1 AC and battery
+13 2 AC only
# -----------------------------------------------------------------
checksums
diff --git a/src/mainboard/lenovo/t420s/smihandler.c b/src/mainboard/lenovo/t420s/smihandler.c
index 2b6e6cd3cb..471095e2b6 100644
--- a/src/mainboard/lenovo/t420s/smihandler.c
+++ b/src/mainboard/lenovo/t420s/smihandler.c
@@ -107,6 +107,8 @@ int mainboard_smi_apmc(u8 data)
void mainboard_smi_sleep(u8 slp_typ)
{
+ h8_usb_always_on();
+
if (slp_typ == 3) {
u8 ec_wake = ec_read(0x32);
/* If EC wake events are enabled, enable wake on EC WAKE GPE. */