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 #else
  18 static inline const struct lpddr2_min_tck
  19         *of_get_min_tck(struct device_node *np, struct device *dev)
  20 {
  21         return NULL;
  22 }
  23
  24 static inline const struct lpddr2_timings
  25         *of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
  26         u32 device_type, u32 *nr_frequencies)
  27 {
  28         return NULL;
  29 }
  30 #endif /* CONFIG_OF && CONFIG_DDR */
  31
  32 #endif /* __LINUX_MEMORY_OF_REG_ */