diff --git a/src/soc/intel/alderlake/fsp_params.c b/src/soc/intel/alderlake/fsp_params.c
index 8003471..4ae2537 100644
--- a/src/soc/intel/alderlake/fsp_params.c
+++ b/src/soc/intel/alderlake/fsp_params.c
@@ -652,6 +652,13 @@
 						   s_cfg->PchPmSlpS3MinAssert,
 						   s_cfg->PchPmSlpAMinAssert,
 						   power_cycle_duration);
+
+	/* Set PsysPmax if it is available from DT */
+	if (config->PsysPmax) {
+		printk(BIOS_DEBUG, "PsysPmax = %dW\n", config->PsysPmax);
+		/* PsysPmax is in unit of 1/8 Watt */
+		s_cfg->PsysPmax = config->PsysPmax * 8;
+	}
 }
 
 static void fill_fsps_irq_params(FSP_S_CONFIG *s_cfg,