diff --git a/src/mainboard/samsung/lumpy/devicetree.cb b/src/mainboard/samsung/lumpy/devicetree.cb
index 0362b2c..b34d024 100644
--- a/src/mainboard/samsung/lumpy/devicetree.cb
+++ b/src/mainboard/samsung/lumpy/devicetree.cb
@@ -14,6 +14,10 @@
 	register "gpu_panel_power_backlight_on_delay" = "2100"	# T5: 210ms
 	register "gpu_panel_power_backlight_off_delay" = "2100"	# TD: 210ms
 
+	# Set backlight PWM values
+	register "gpu_cpu_backlight" = "0x000001e8"
+	register "gpu_pch_backlight" = "0x03d00000"
+
 	register "max_mem_clock_mhz" = "666"
 
 	device cpu_cluster 0 on