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
  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
  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
  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
  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
  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
  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_ */