diff --git a/soc/arm/atmel_sam0/same51/soc.h b/soc/arm/atmel_sam0/same51/soc.h
index 64550333855..746a001be69 100644
--- a/soc/arm/atmel_sam0/same51/soc.h
+++ b/soc/arm/atmel_sam0/same51/soc.h
@@ -37,6 +37,7 @@
 #include "../common/atmel_sam0_dt.h"
 
 #define SOC_ATMEL_SAM0_OSC32K_FREQ_HZ 32768
+#define SOC_ATMEL_SAM0_DFLL48_FREQ_HZ 48000000
 
 /** Processor Clock (HCLK) Frequency */
 #define SOC_ATMEL_SAM0_HCLK_FREQ_HZ CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC
diff --git a/soc/arm/atmel_sam0/same54/soc.h b/soc/arm/atmel_sam0/same54/soc.h
index 4f49e68c31f..b62eead707e 100644
--- a/soc/arm/atmel_sam0/same54/soc.h
+++ b/soc/arm/atmel_sam0/same54/soc.h
@@ -36,6 +36,7 @@
 #include "../common/atmel_sam0_dt.h"
 
 #define SOC_ATMEL_SAM0_OSC32K_FREQ_HZ 32768
+#define SOC_ATMEL_SAM0_DFLL48_FREQ_HZ 48000000
 
 /** Processor Clock (HCLK) Frequency */
 #define SOC_ATMEL_SAM0_HCLK_FREQ_HZ CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC