Merge tag 'drm-next-2021-09-10' of git://anongit.freedesktop.org/drm/drm
[platform/kernel/linux-rpi.git] / drivers / memory / of_memory.h
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 #else
24 static inline const struct lpddr2_min_tck
25         *of_get_min_tck(struct device_node *np, struct device *dev)
26 {
27         return NULL;
28 }
29
30 static inline const struct lpddr2_timings
31         *of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
32         u32 device_type, u32 *nr_frequencies)
33 {
34         return NULL;
35 }
36
37 static inline const struct lpddr3_min_tck
38         *of_lpddr3_get_min_tck(struct device_node *np, struct device *dev)
39 {
40         return NULL;
41 }
42
43 static inline const struct lpddr3_timings
44         *of_lpddr3_get_ddr_timings(struct device_node *np_ddr,
45         struct device *dev, u32 device_type, u32 *nr_frequencies)
46 {
47         return NULL;
48 }
49 #endif /* CONFIG_OF && CONFIG_DDR */
50
51 #endif /* __LINUX_MEMORY_OF_REG_ */