diff --git a/src/mainboard/siemens/mc_ehl/mainboard.c b/src/mainboard/siemens/mc_ehl/mainboard.c
index e64dbda..eff2d21 100644
--- a/src/mainboard/siemens/mc_ehl/mainboard.c
+++ b/src/mainboard/siemens/mc_ehl/mainboard.c
@@ -10,6 +10,7 @@
 #include <hwilib.h>
 #include <i210.h>
 #include <soc/gpio.h>
+#include <soc/ramstage.h>
 #include <string.h>
 #include <timer.h>
 #include <timestamp.h>
@@ -114,6 +115,15 @@
 	printk(BIOS_NOTICE, "done!\n");
 }
 
+void mainboard_silicon_init_params(FSP_S_CONFIG *params)
+{
+	/* Disable CPU power states (C-states) */
+	params->Cx = 0;
+
+	/* Set maximum package C-state to PkgC0C1 */
+	params->PkgCStateLimit = 0;
+}
+
 static void mainboard_init(void *chip_info)
 {
 	const struct pad_config *pads;