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/* 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 { const char name; unsigned int offset; unsigned int bytes; unsigned int bit_offset; unsigned int nbits; }; /** * 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_u16(struct device dev, const char cell_id, u16 val); int nvmem_cell_read_u32(struct device dev, const char cell_id, u32 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); #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 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; } #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 */

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