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  */
   7
   8 #ifndef __LINUX_MEMORY_OF_REG_H
   9 #define __LINUX_MEMORY_OF_REG_H
  10
  11 #if defined(CONFIG_OF) && defined(CONFIG_DDR)
  12 extern const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
  13                 struct device *dev);
  14 extern const struct lpddr2_timings
  15         *of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
  16         u32 device_type, u32 *nr_frequencies);
  17 extern const struct lpddr3_min_tck
  18         *of_lpddr3_get_min_tck(struct device_node *np, struct device *dev);
  19 extern const struct lpddr3_timings
  20         *of_lpddr3_get_ddr_timings(struct device_node *np_ddr,
  21         struct device *dev, u32 device_type, u32 *nr_frequencies);
  22 #else
  23 static inline const struct lpddr2_min_tck
  24         *of_get_min_tck(struct device_node *np, struct device *dev)
  25 {
  26         return NULL;
  27 }
  28
  29 static inline const struct lpddr2_timings
  30         *of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
  31         u32 device_type, u32 *nr_frequencies)
  32 {
  33         return NULL;
  34 }
  35
  36 static inline const struct lpddr3_min_tck
  37         *of_lpddr3_get_min_tck(struct device_node *np, struct device *dev)
  38 {
  39         return NULL;
  40 }
  41
  42 static inline const struct lpddr3_timings
  43         *of_lpddr3_get_ddr_timings(struct device_node *np_ddr,
  44         struct device *dev, u32 device_type, u32 *nr_frequencies)
  45 {
  46         return NULL;
  47 }
  48 #endif /* CONFIG_OF && CONFIG_DDR */
  49
  50 #endif /* __LINUX_MEMORY_OF_REG_ */