diff --git a/include/fdtdec.h b/include/fdtdec.h
index 760b392bdf..bc79389260 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -926,6 +926,23 @@ int fdtdec_decode_display_timing(const void *blob, int node, int index,
  */
 int fdtdec_setup_mem_size_base(void);
 
+/**
+ * fdtdec_setup_mem_size_base_lowest() - decode and setup gd->ram_size and
+ * gd->ram_start by lowest available memory base
+ *
+ * Decode the /memory 'reg' property to determine the lowest start of the memory
+ * bank bank and populate the global data with it.
+ *
+ * This function should be called from a boards dram_init(). This helper
+ * function allows for boards to query the device tree for DRAM size and start
+ * address instead of hard coding the value in the case where the memory size
+ * and start address cannot be detected automatically.
+ *
+ * @return 0 if OK, -EINVAL if the /memory node or reg property is missing or
+ * invalid
+ */
+int fdtdec_setup_mem_size_base_lowest(void);
+
 /**
  * fdtdec_setup_memory_banksize() - decode and populate gd->bd->bi_dram
  *
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 78576b530f..da94bc5e15 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1106,6 +1106,51 @@ int fdtdec_setup_memory_banksize(void)
 
 	return 0;
 }
+
+int fdtdec_setup_mem_size_base_lowest(void)
+{
+	int bank, ret, mem, reg = 0;
+	struct fdt_resource res;
+	unsigned long base;
+	phys_size_t size;
+	const void *blob = gd->fdt_blob;
+
+	gd->ram_base = (unsigned long)~0;
+
+	mem = get_next_memory_node(blob, -1);
+	if (mem < 0) {
+		debug("%s: Missing /memory node\n", __func__);
+		return -EINVAL;
+	}
+
+	for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
+		ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
+		if (ret == -FDT_ERR_NOTFOUND) {
+			reg = 0;
+			mem = get_next_memory_node(blob, mem);
+			if (mem == -FDT_ERR_NOTFOUND)
+				break;
+
+			ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
+			if (ret == -FDT_ERR_NOTFOUND)
+				break;
+		}
+		if (ret != 0)
+			return -EINVAL;
+
+		base = (unsigned long)res.start;
+		size = (phys_size_t)(res.end - res.start + 1);
+
+		if (gd->ram_base > base && size) {
+			gd->ram_base = base;
+			gd->ram_size = size;
+			debug("%s: Initial DRAM base %lx size %lx\n",
+			      __func__, base, (unsigned long)size);
+		}
+	}
+
+	return 0;
+}
 #endif
 
 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)