xref: /openbmc/linux/drivers/memory/of_memory.h (revision 38322cf4)
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  * Copyright (C) 2020 Krzysztof Kozlowski <krzk@kernel.org>
7  */
8 
9 #ifndef __LINUX_MEMORY_OF_REG_H
10 #define __LINUX_MEMORY_OF_REG_H
11 
12 #if defined(CONFIG_OF) && defined(CONFIG_DDR)
13 const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
14 					    struct device *dev);
15 const struct lpddr2_timings *of_get_ddr_timings(struct device_node *np_ddr,
16 						struct device *dev,
17 						u32 device_type, u32 *nr_frequencies);
18 const struct lpddr3_min_tck *of_lpddr3_get_min_tck(struct device_node *np,
19 						   struct device *dev);
20 const struct lpddr3_timings *
21 of_lpddr3_get_ddr_timings(struct device_node *np_ddr,
22 			  struct device *dev, u32 device_type, u32 *nr_frequencies);
23 
24 const struct lpddr2_info *of_lpddr2_get_info(struct device_node *np,
25 					     struct device *dev);
26 #else
27 static inline const struct lpddr2_min_tck
of_get_min_tck(struct device_node * np,struct device * dev)28 	*of_get_min_tck(struct device_node *np, struct device *dev)
29 {
30 	return NULL;
31 }
32 
33 static inline const struct lpddr2_timings
of_get_ddr_timings(struct device_node * np_ddr,struct device * dev,u32 device_type,u32 * nr_frequencies)34 	*of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
35 	u32 device_type, u32 *nr_frequencies)
36 {
37 	return NULL;
38 }
39 
40 static inline const struct lpddr3_min_tck
of_lpddr3_get_min_tck(struct device_node * np,struct device * dev)41 	*of_lpddr3_get_min_tck(struct device_node *np, struct device *dev)
42 {
43 	return NULL;
44 }
45 
46 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)47 	*of_lpddr3_get_ddr_timings(struct device_node *np_ddr,
48 	struct device *dev, u32 device_type, u32 *nr_frequencies)
49 {
50 	return NULL;
51 }
52 
53 static inline const struct lpddr2_info
of_lpddr2_get_info(struct device_node * np,struct device * dev)54 	*of_lpddr2_get_info(struct device_node *np, struct device *dev)
55 {
56 	return NULL;
57 }
58 #endif /* CONFIG_OF && CONFIG_DDR */
59 
60 #endif /* __LINUX_MEMORY_OF_REG_ */
61