1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/memory/of_memory.h b/drivers/memory/of_memory.h
new file mode 100644
index 000000000..1c4e47fed
--- /dev/null
+++ b/drivers/memory/of_memory.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * OpenFirmware helpers for memory drivers
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ * Copyright (C) 2020 Krzysztof Kozlowski <krzk@kernel.org>
+ */
+
+#ifndef __LINUX_MEMORY_OF_REG_H
+#define __LINUX_MEMORY_OF_REG_H
+
+#if defined(CONFIG_OF) && defined(CONFIG_DDR)
+const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
+					    struct device *dev);
+const struct lpddr2_timings *of_get_ddr_timings(struct device_node *np_ddr,
+						struct device *dev,
+						u32 device_type, u32 *nr_frequencies);
+const struct lpddr3_min_tck *of_lpddr3_get_min_tck(struct device_node *np,
+						   struct device *dev);
+const struct lpddr3_timings *
+of_lpddr3_get_ddr_timings(struct device_node *np_ddr,
+			  struct device *dev, u32 device_type, u32 *nr_frequencies);
+
+const struct lpddr2_info *of_lpddr2_get_info(struct device_node *np,
+					     struct device *dev);
+#else
+static inline const struct lpddr2_min_tck
+	*of_get_min_tck(struct device_node *np, struct device *dev)
+{
+	return NULL;
+}
+
+static inline const struct lpddr2_timings
+	*of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
+	u32 device_type, u32 *nr_frequencies)
+{
+	return NULL;
+}
+
+static inline const struct lpddr3_min_tck
+	*of_lpddr3_get_min_tck(struct device_node *np, struct device *dev)
+{
+	return NULL;
+}
+
+static inline const struct lpddr3_timings
+	*of_lpddr3_get_ddr_timings(struct device_node *np_ddr,
+	struct device *dev, u32 device_type, u32 *nr_frequencies)
+{
+	return NULL;
+}
+
+static inline const struct lpddr2_info
+	*of_lpddr2_get_info(struct device_node *np, struct device *dev)
+{
+	return NULL;
+}
+#endif /* CONFIG_OF && CONFIG_DDR */
+
+#endif /* __LINUX_MEMORY_OF_REG_ */