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245 lines
6.3 KiB
245 lines
6.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* nvmem framework consumer. |
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* |
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* Copyright (C) 2015 Srinivas Kandagatla <[email protected]> |
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* Copyright (C) 2013 Maxime Ripard <[email protected]> |
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*/ |
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#ifndef _LINUX_NVMEM_CONSUMER_H |
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#define _LINUX_NVMEM_CONSUMER_H |
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#include <linux/err.h> |
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#include <linux/errno.h> |
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#include <linux/notifier.h> |
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struct device; |
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struct device_node; |
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/* consumer cookie */ |
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struct nvmem_cell; |
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struct nvmem_device; |
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struct nvmem_cell_info { |
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const char *name; |
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unsigned int offset; |
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unsigned int bytes; |
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unsigned int bit_offset; |
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unsigned int nbits; |
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}; |
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/** |
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* struct nvmem_cell_lookup - cell lookup entry |
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* |
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* @nvmem_name: Name of the provider. |
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* @cell_name: Name of the nvmem cell as defined in the name field of |
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* struct nvmem_cell_info. |
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* @dev_id: Name of the consumer device that will be associated with |
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* this cell. |
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* @con_id: Connector id for this cell lookup. |
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*/ |
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struct nvmem_cell_lookup { |
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const char *nvmem_name; |
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const char *cell_name; |
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const char *dev_id; |
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const char *con_id; |
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struct list_head node; |
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}; |
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enum { |
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NVMEM_ADD = 1, |
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NVMEM_REMOVE, |
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NVMEM_CELL_ADD, |
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NVMEM_CELL_REMOVE, |
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}; |
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#if IS_ENABLED(CONFIG_NVMEM) |
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/* Cell based interface */ |
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struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *id); |
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struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *id); |
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void nvmem_cell_put(struct nvmem_cell *cell); |
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void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell); |
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void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len); |
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int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len); |
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int nvmem_cell_read_u8(struct device *dev, const char *cell_id, u8 *val); |
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int nvmem_cell_read_u16(struct device *dev, const char *cell_id, u16 *val); |
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int nvmem_cell_read_u32(struct device *dev, const char *cell_id, u32 *val); |
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int nvmem_cell_read_u64(struct device *dev, const char *cell_id, u64 *val); |
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/* direct nvmem device read/write interface */ |
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struct nvmem_device *nvmem_device_get(struct device *dev, const char *name); |
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struct nvmem_device *devm_nvmem_device_get(struct device *dev, |
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const char *name); |
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void nvmem_device_put(struct nvmem_device *nvmem); |
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void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem); |
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int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset, |
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size_t bytes, void *buf); |
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int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset, |
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size_t bytes, void *buf); |
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ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem, |
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struct nvmem_cell_info *info, void *buf); |
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int nvmem_device_cell_write(struct nvmem_device *nvmem, |
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struct nvmem_cell_info *info, void *buf); |
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const char *nvmem_dev_name(struct nvmem_device *nvmem); |
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void nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries, |
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size_t nentries); |
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void nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries, |
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size_t nentries); |
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int nvmem_register_notifier(struct notifier_block *nb); |
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int nvmem_unregister_notifier(struct notifier_block *nb); |
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struct nvmem_device *nvmem_device_find(void *data, |
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int (*match)(struct device *dev, const void *data)); |
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#else |
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static inline struct nvmem_cell *nvmem_cell_get(struct device *dev, |
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const char *id) |
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{ |
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return ERR_PTR(-EOPNOTSUPP); |
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} |
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static inline struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, |
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const char *id) |
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{ |
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return ERR_PTR(-EOPNOTSUPP); |
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} |
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static inline void devm_nvmem_cell_put(struct device *dev, |
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struct nvmem_cell *cell) |
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{ |
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} |
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static inline void nvmem_cell_put(struct nvmem_cell *cell) |
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{ |
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} |
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static inline void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len) |
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{ |
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return ERR_PTR(-EOPNOTSUPP); |
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} |
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static inline int nvmem_cell_write(struct nvmem_cell *cell, |
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void *buf, size_t len) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline int nvmem_cell_read_u16(struct device *dev, |
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const char *cell_id, u16 *val) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline int nvmem_cell_read_u32(struct device *dev, |
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const char *cell_id, u32 *val) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline int nvmem_cell_read_u64(struct device *dev, |
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const char *cell_id, u64 *val) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline struct nvmem_device *nvmem_device_get(struct device *dev, |
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const char *name) |
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{ |
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return ERR_PTR(-EOPNOTSUPP); |
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} |
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static inline struct nvmem_device *devm_nvmem_device_get(struct device *dev, |
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const char *name) |
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{ |
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return ERR_PTR(-EOPNOTSUPP); |
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} |
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static inline void nvmem_device_put(struct nvmem_device *nvmem) |
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{ |
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} |
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static inline void devm_nvmem_device_put(struct device *dev, |
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struct nvmem_device *nvmem) |
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{ |
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} |
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static inline ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem, |
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struct nvmem_cell_info *info, |
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void *buf) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline int nvmem_device_cell_write(struct nvmem_device *nvmem, |
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struct nvmem_cell_info *info, |
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void *buf) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline int nvmem_device_read(struct nvmem_device *nvmem, |
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unsigned int offset, size_t bytes, |
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void *buf) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline int nvmem_device_write(struct nvmem_device *nvmem, |
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unsigned int offset, size_t bytes, |
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void *buf) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline const char *nvmem_dev_name(struct nvmem_device *nvmem) |
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{ |
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return NULL; |
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} |
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static inline void |
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nvmem_add_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries) {} |
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static inline void |
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nvmem_del_cell_lookups(struct nvmem_cell_lookup *entries, size_t nentries) {} |
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static inline int nvmem_register_notifier(struct notifier_block *nb) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline int nvmem_unregister_notifier(struct notifier_block *nb) |
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{ |
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return -EOPNOTSUPP; |
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} |
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static inline struct nvmem_device *nvmem_device_find(void *data, |
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int (*match)(struct device *dev, const void *data)) |
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{ |
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return NULL; |
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} |
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#endif /* CONFIG_NVMEM */ |
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#if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF) |
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struct nvmem_cell *of_nvmem_cell_get(struct device_node *np, |
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const char *id); |
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struct nvmem_device *of_nvmem_device_get(struct device_node *np, |
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const char *name); |
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#else |
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static inline struct nvmem_cell *of_nvmem_cell_get(struct device_node *np, |
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const char *id) |
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{ |
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return ERR_PTR(-EOPNOTSUPP); |
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} |
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static inline struct nvmem_device *of_nvmem_device_get(struct device_node *np, |
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const char *name) |
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{ |
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return ERR_PTR(-EOPNOTSUPP); |
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} |
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#endif /* CONFIG_NVMEM && CONFIG_OF */ |
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#endif /* ifndef _LINUX_NVMEM_CONSUMER_H */
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