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_ */ 51