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of_memory.h
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1 /*
2  * OpenFirmware helpers for memory drivers
3  *
4  * Copyright (C) 2012 Texas Instruments, Inc.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  */
11 
12 #ifndef __LINUX_MEMORY_OF_REG_H
13 #define __LINUX_MEMORY_OF_REG_H
14 
15 #if defined(CONFIG_OF) && defined(CONFIG_DDR)
16 extern const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
17  struct device *dev);
18 extern const struct lpddr2_timings
19  *of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
20  u32 device_type, u32 *nr_frequencies);
21 #else
22 static inline const struct lpddr2_min_tck
23  *of_get_min_tck(struct device_node *np, struct device *dev)
24 {
25  return NULL;
26 }
27 
28 static inline const struct lpddr2_timings
29  *of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
30  u32 device_type, u32 *nr_frequencies)
31 {
32  return NULL;
33 }
34 #endif /* CONFIG_OF && CONFIG_DDR */
35 
36 #endif /* __LINUX_MEMORY_OF_REG_ */