1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * OpenFirmware helpers for memory drivers
 4 *
 5 * Copyright (C) 2012 Texas Instruments, Inc.
 6 */
 7
 8#ifndef __LINUX_MEMORY_OF_REG_H
 9#define __LINUX_MEMORY_OF_REG_H
10
11#if defined(CONFIG_OF) && defined(CONFIG_DDR)
12extern const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
13		struct device *dev);
14extern const struct lpddr2_timings
15	*of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
16	u32 device_type, u32 *nr_frequencies);
17#else
18static inline const struct lpddr2_min_tck
19	*of_get_min_tck(struct device_node *np, struct device *dev)
20{
21	return NULL;
22}
23
24static inline const struct lpddr2_timings
25	*of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
26	u32 device_type, u32 *nr_frequencies)
27{
28	return NULL;
29}
30#endif /* CONFIG_OF && CONFIG_DDR */
31
32#endif /* __LINUX_MEMORY_OF_REG_ */