LXR linux/drivers/memory/of

   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)
  13const struct lpddr2_min_tck *of_get_min_tck(struct device_node *np,
  14                                            struct device *dev);
  15const struct lpddr2_timings *of_get_ddr_timings(struct device_node *np_ddr,
  16                                                struct device *dev,
  17                                                u32 device_type, u32 *nr_frequencies);
  18const struct lpddr3_min_tck *of_lpddr3_get_min_tck(struct device_node *np,
  19                                                   struct device *dev);
  20const struct lpddr3_timings *
  21of_lpddr3_get_ddr_timings(struct device_node *np_ddr,
  22                          struct device *dev, u32 device_type, u32 *nr_frequencies);
  23#else
  24static inline const struct lpddr2_min_tck
  25        *of_get_min_tck(struct device_node *np, struct device *dev)
  26{
  27        return NULL;
  28}
  29
  30static inline const struct lpddr2_timings
  31        *of_get_ddr_timings(struct device_node *np_ddr, struct device *dev,
  32        u32 device_type, u32 *nr_frequencies)
  33{
  34        return NULL;
  35}
  36
  37static inline const struct lpddr3_min_tck
  38        *of_lpddr3_get_min_tck(struct device_node *np, struct device *dev)
  39{
  40        return NULL;
  41}
  42
  43static inline const struct lpddr3_timings
  44        *of_lpddr3_get_ddr_timings(struct device_node *np_ddr,
  45        struct device *dev, u32 device_type, u32 *nr_frequencies)
  46{
  47        return NULL;
  48}
  49#endif /* CONFIG_OF && CONFIG_DDR */
  50
  51#endif /* __LINUX_MEMORY_OF_REG_ */
  52