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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 | /* SPDX-License-Identifier: GPL-2.0 */ /* * nvmem framework consumer. * * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org> * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com> */ #ifndef _LINUX_NVMEM_CONSUMER_H #define _LINUX_NVMEM_CONSUMER_H #include <linux/err.h> #include <linux/errno.h> #include <linux/notifier.h> struct device; struct device_node; /* consumer cookie */ struct nvmem_cell; struct nvmem_device; struct nvmem_cell_info; /** * struct nvmem_cell_lookup - cell lookup entry * * @nvmem_name: Name of the provider. * @cell_name: Name of the nvmem cell as defined in the name field of * struct nvmem_cell_info. * @dev_id: Name of the consumer device that will be associated with * this cell. * @con_id: Connector id for this cell lookup. */ struct nvmem_cell_lookup { const char *nvmem_name; const char *cell_name; const char *dev_id; const char *con_id; struct list_head node; }; enum { NVMEM_ADD = 1, NVMEM_REMOVE, NVMEM_CELL_ADD, NVMEM_CELL_REMOVE, }; #if IS_ENABLED(CONFIG_NVMEM) /* Cell based interface */ struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *id); struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *id); void nvmem_cell_put(struct nvmem_cell *cell); void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell); void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len); int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len); int nvmem_cell_read_u8(struct device *dev, const char *cell_id, u8 *val); int nvmem_cell_read_u16(struct device *dev, const char *cell_id, u16 *val); int nvmem_cell_read_u32(struct device *dev, const char *cell_id, u32 *val); int nvmem_cell_read_u64(struct device *dev, const char *cell_id, u64 *val); int nvmem_cell_read_variable_le_u32(struct device *dev, const char *cell_id, u32 *val); int nvmem_cell_read_variable_le_u64(struct device *dev, const char *cell_id, u64 *val); /* direct nvmem device read/write interface */ struct nvmem_device *nvmem_device_get(struct device *dev, const char *name); struct nvmem_device *devm_nvmem_device_get(struct device *dev, const char *name); void nvmem_device_put(struct nvmem_device *nvmem); void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem); int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset, size_t bytes, void *buf); int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset, size_t bytes, void *buf); ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem, struct nvmem_cell_info *info, void *buf); int nvmem_device_cell_write(struct nvmem_device *nvmem, struct nvmem_cell_info *info, void *buf); const char *nvmem_dev_name(struct nvmem_device *nvmem); void nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries); void nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries); int nvmem_register_notifier(struct notifier_block *nb); int nvmem_unregister_notifier(struct notifier_block *nb); struct nvmem_device *nvmem_device_find(void *data, int (*match)(struct device *dev, const void *data)); #else static inline struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *id) { return ERR_PTR(-EOPNOTSUPP); } static inline struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *id) { return ERR_PTR(-EOPNOTSUPP); } static inline void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell) { } static inline void nvmem_cell_put(struct nvmem_cell *cell) { } static inline void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len) { return ERR_PTR(-EOPNOTSUPP); } static inline int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len) { return -EOPNOTSUPP; } static inline int nvmem_cell_read_u16(struct device *dev, const char *cell_id, u16 *val) { return -EOPNOTSUPP; } static inline int nvmem_cell_read_u32(struct device *dev, const char *cell_id, u32 *val) { return -EOPNOTSUPP; } static inline int nvmem_cell_read_u64(struct device *dev, const char *cell_id, u64 *val) { return -EOPNOTSUPP; } static inline int nvmem_cell_read_variable_le_u32(struct device *dev, const char *cell_id, u32 *val) { return -EOPNOTSUPP; } static inline int nvmem_cell_read_variable_le_u64(struct device *dev, const char *cell_id, u64 *val) { return -EOPNOTSUPP; } static inline struct nvmem_device *nvmem_device_get(struct device *dev, const char *name) { return ERR_PTR(-EOPNOTSUPP); } static inline struct nvmem_device *devm_nvmem_device_get(struct device *dev, const char *name) { return ERR_PTR(-EOPNOTSUPP); } static inline void nvmem_device_put(struct nvmem_device *nvmem) { } static inline void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem) { } static inline ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem, struct nvmem_cell_info *info, void *buf) { return -EOPNOTSUPP; } static inline int nvmem_device_cell_write(struct nvmem_device *nvmem, struct nvmem_cell_info *info, void *buf) { return -EOPNOTSUPP; } static inline int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset, size_t bytes, void *buf) { return -EOPNOTSUPP; } static inline int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset, size_t bytes, void *buf) { return -EOPNOTSUPP; } static inline const char *nvmem_dev_name(struct nvmem_device *nvmem) { return NULL; } static inline void nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries) {} static inline void nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries) {} static inline int nvmem_register_notifier(struct notifier_block *nb) { return -EOPNOTSUPP; } static inline int nvmem_unregister_notifier(struct notifier_block *nb) { return -EOPNOTSUPP; } static inline struct nvmem_device *nvmem_device_find(void *data, int (*match)(struct device *dev, const void *data)) { return NULL; } #endif /* CONFIG_NVMEM */ #if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF) struct nvmem_cell *of_nvmem_cell_get(struct device_node *np, const char *id); struct nvmem_device *of_nvmem_device_get(struct device_node *np, const char *name); #else static inline struct nvmem_cell *of_nvmem_cell_get(struct device_node *np, const char *id) { return ERR_PTR(-EOPNOTSUPP); } static inline struct nvmem_device *of_nvmem_device_get(struct device_node *np, const char *name) { return ERR_PTR(-EOPNOTSUPP); } #endif /* CONFIG_NVMEM && CONFIG_OF */ #endif /* ifndef _LINUX_NVMEM_CONSUMER_H */ |