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-rw-r--r--src/mainboard/lenovo/t420s/devicetree.cb4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/t420s/devicetree.cb b/src/mainboard/lenovo/t420s/devicetree.cb
index d1a9bfb3c3..a090308c8c 100644
--- a/src/mainboard/lenovo/t420s/devicetree.cb
+++ b/src/mainboard/lenovo/t420s/devicetree.cb
@@ -150,6 +150,10 @@ chip northbridge/intel/sandybridge
register "eventc_enable" = "0xff"
register "eventd_enable" = "0xff"
register "evente_enable" = "0x0d"
+
+ register "has_bdc_detection" = "1"
+ register "bdc_gpio_num" = "54"
+ register "bdc_gpio_lvl" = "0"
end
chip drivers/lenovo/hybrid_graphics
device pnp ff.f on end # dummy