Merge "of: Add snapshot of of_common.h file"

include/soc/qcom/of_common.h

@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2021, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef __QCOM_OF_H
+#define __QCOM_OF_H
+
+#include <linux/of.h>
+
+/**
+ * of_fdt_get_ddrtype - Return the type of ddr (4/5) on the current device
+ *
+ * On match, returns a non-zero positive value which matches the ddr type.
+ * Otherwise returns -ENOENT.
+ */
+static inline int of_fdt_get_ddrtype(void)
+{
+	int ret;
+	u32 ddr_type;
+	struct device_node *mem_node;
+
+	mem_node = of_find_node_by_path("/memory");
+	if (!mem_node)
+		return -ENOENT;
+
+	ret = of_property_read_u32(mem_node, "ddr_device_type", &ddr_type);
+	of_node_put(mem_node);
+	if (ret < 0)
+		return -ENOENT;
+
+	return ddr_type;
+}
+
+#endif