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_ */ 37