name : nvmem-consumer.h /* 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, NVMEM_LAYOUT_ADD, NVMEM_LAYOUT_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); size_t nvmem_dev_size(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_u8(struct device *dev, const char *cell_id, u8 *val) { 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 */