drivers/memory/of_memory.h

   1 /*
   2  * OpenFirmware helpers for memory drivers
   3  *
   4  * Copyright (C) 2012 Texas Instruments, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #ifndef __LINUX_MEMORY_OF_REG_H
  13 #define __LINUX_MEMORY_OF_REG_H
  14
  15 #if defined(CONFIG_OF) && defined(CONFIG_DDR)
  16 extern const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
  17                 struct device *dev);
  18 extern const struct lpddr2_timings
  19         *of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
  20         u32 device_type, u32 *nr_frequencies);
  21 #else
  22 static inline const struct lpddr2_min_tck
  23         *of_get_min_tck(struct device_node *np, struct device *dev)
  24 {
  25         return NULL;
  26 }
  27
  28 static inline const struct lpddr2_timings
  29         *of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
  30         u32 device_type, u32 *nr_frequencies)
  31 {
  32         return NULL;
  33 }
  34 #endif /* CONFIG_OF && CONFIG_DDR */
  35
  36 #endif /* __LINUX_MEMORY_OF_REG_ */