drivers/memory/of_memory.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * OpenFirmware helpers for memory drivers
0004  *
0005  * Copyright (C) 2012 Texas Instruments, Inc.
0006  * Copyright (C) 2020 Krzysztof Kozlowski <krzk@kernel.org>
0007  */
0008
0009 #ifndef __LINUX_MEMORY_OF_REG_H
0010 #define __LINUX_MEMORY_OF_REG_H
0011
0012 #if defined(CONFIG_OF) && defined(CONFIG_DDR)
0013 const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
0014                         struct device *dev);
0015 const struct lpddr2_timings *of_get_ddr_timings(struct device_node *np_ddr,
0016                         struct device *dev,
0017                         u32 device_type, u32 *nr_frequencies);
0018 const struct lpddr3_min_tck *of_lpddr3_get_min_tck(struct device_node *np,
0019                            struct device *dev);
0020 const struct lpddr3_timings *
0021 of_lpddr3_get_ddr_timings(struct device_node *np_ddr,
0022               struct device *dev, u32 device_type, u32 *nr_frequencies);
0023
0024 const struct lpddr2_info *of_lpddr2_get_info(struct device_node *np,
0025                          struct device *dev);
0026 #else
0027 static inline const struct lpddr2_min_tck
0028     *of_get_min_tck(struct device_node *np, struct device *dev)
0029 {
0030     return NULL;
0031 }
0032
0033 static inline const struct lpddr2_timings
0034     *of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
0035     u32 device_type, u32 *nr_frequencies)
0036 {
0037     return NULL;
0038 }
0039
0040 static inline const struct lpddr3_min_tck
0041     *of_lpddr3_get_min_tck(struct device_node *np, struct device *dev)
0042 {
0043     return NULL;
0044 }
0045
0046 static inline const struct lpddr3_timings
0047     *of_lpddr3_get_ddr_timings(struct device_node *np_ddr,
0048     struct device *dev, u32 device_type, u32 *nr_frequencies)
0049 {
0050     return NULL;
0051 }
0052
0053 static inline const struct lpddr2_info
0054     *of_lpddr2_get_info(struct device_node *np, struct device *dev)
0055 {
0056     return NULL;
0057 }
0058 #endif /* CONFIG_OF && CONFIG_DDR */
0059
0060 #endif /* __LINUX_MEMORY_OF_REG_ */