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d026d70a2e
This function does a quick and easy read of an u32 value without any kind of resource management code on the consumer side. Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-by: Shawn Guo <shawnguo@kernel.org> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
164 lines
4.3 KiB
C
164 lines
4.3 KiB
C
/*
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* nvmem framework consumer.
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*
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* Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
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* Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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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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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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#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 *name);
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struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *name);
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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_u32(struct device *dev, const char *cell_id, u32 *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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#else
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static inline struct nvmem_cell *nvmem_cell_get(struct device *dev,
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const char *name)
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{
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return ERR_PTR(-ENOSYS);
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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 *name)
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{
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return ERR_PTR(-ENOSYS);
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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(-ENOSYS);
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}
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static inline int nvmem_cell_write(struct nvmem_cell *cell,
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const char *buf, size_t len)
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{
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return -ENOSYS;
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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 -ENOSYS;
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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(-ENOSYS);
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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(-ENOSYS);
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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 -ENOSYS;
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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 -ENOSYS;
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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 -ENOSYS;
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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 -ENOSYS;
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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 *name);
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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 *name)
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{
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return ERR_PTR(-ENOSYS);
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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(-ENOSYS);
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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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