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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - include/linux/nvmem-consumer.h
1 /* SPDX-License-Identifier: GPL-2.0 */
3 * nvmem framework consumer.
5 * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
6 * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
9 #ifndef _LINUX_NVMEM_CONSUMER_H
10 #define _LINUX_NVMEM_CONSUMER_H
12 #include <linux/err.h>
13 #include <linux/errno.h>
14 #include <linux/notifier.h>
22 struct nvmem_cell_info
{
26 unsigned int bit_offset
;
31 * struct nvmem_cell_lookup - cell lookup entry
33 * @nvmem_name: Name of the provider.
34 * @cell_name: Name of the nvmem cell as defined in the name field of
35 * struct nvmem_cell_info.
36 * @dev_id: Name of the consumer device that will be associated with
38 * @con_id: Connector id for this cell lookup.
40 struct nvmem_cell_lookup
{
41 const char *nvmem_name
;
42 const char *cell_name
;
45 struct list_head node
;
55 #if IS_ENABLED(CONFIG_NVMEM)
57 /* Cell based interface */
58 struct nvmem_cell
*nvmem_cell_get(struct device
*dev
, const char *id
);
59 struct nvmem_cell
*devm_nvmem_cell_get(struct device
*dev
, const char *id
);
60 void nvmem_cell_put(struct nvmem_cell
*cell
);
61 void devm_nvmem_cell_put(struct device
*dev
, struct nvmem_cell
*cell
);
62 void *nvmem_cell_read(struct nvmem_cell
*cell
, size_t *len
);
63 int nvmem_cell_write(struct nvmem_cell
*cell
, void *buf
, size_t len
);
64 int nvmem_cell_read_u32(struct device
*dev
, const char *cell_id
, u32
*val
);
66 /* direct nvmem device read/write interface */
67 struct nvmem_device
*nvmem_device_get(struct device
*dev
, const char *name
);
68 struct nvmem_device
*devm_nvmem_device_get(struct device
*dev
,
70 void nvmem_device_put(struct nvmem_device
*nvmem
);
71 void devm_nvmem_device_put(struct device
*dev
, struct nvmem_device
*nvmem
);
72 int nvmem_device_read(struct nvmem_device
*nvmem
, unsigned int offset
,
73 size_t bytes
, void *buf
);
74 int nvmem_device_write(struct nvmem_device
*nvmem
, unsigned int offset
,
75 size_t bytes
, void *buf
);
76 ssize_t
nvmem_device_cell_read(struct nvmem_device
*nvmem
,
77 struct nvmem_cell_info
*info
, void *buf
);
78 int nvmem_device_cell_write(struct nvmem_device
*nvmem
,
79 struct nvmem_cell_info
*info
, void *buf
);
81 const char *nvmem_dev_name(struct nvmem_device
*nvmem
);
83 void nvmem_add_cell_lookups(struct nvmem_cell_lookup
*entries
,
85 void nvmem_del_cell_lookups(struct nvmem_cell_lookup
*entries
,
88 int nvmem_register_notifier(struct notifier_block
*nb
);
89 int nvmem_unregister_notifier(struct notifier_block
*nb
);
93 static inline struct nvmem_cell
*nvmem_cell_get(struct device
*dev
,
96 return ERR_PTR(-EOPNOTSUPP
);
99 static inline struct nvmem_cell
*devm_nvmem_cell_get(struct device
*dev
,
102 return ERR_PTR(-EOPNOTSUPP
);
105 static inline void devm_nvmem_cell_put(struct device
*dev
,
106 struct nvmem_cell
*cell
)
110 static inline void nvmem_cell_put(struct nvmem_cell
*cell
)
114 static inline void *nvmem_cell_read(struct nvmem_cell
*cell
, size_t *len
)
116 return ERR_PTR(-EOPNOTSUPP
);
119 static inline int nvmem_cell_write(struct nvmem_cell
*cell
,
120 const char *buf
, size_t len
)
125 static inline int nvmem_cell_read_u32(struct device
*dev
,
126 const char *cell_id
, u32
*val
)
131 static inline struct nvmem_device
*nvmem_device_get(struct device
*dev
,
134 return ERR_PTR(-EOPNOTSUPP
);
137 static inline struct nvmem_device
*devm_nvmem_device_get(struct device
*dev
,
140 return ERR_PTR(-EOPNOTSUPP
);
143 static inline void nvmem_device_put(struct nvmem_device
*nvmem
)
147 static inline void devm_nvmem_device_put(struct device
*dev
,
148 struct nvmem_device
*nvmem
)
152 static inline ssize_t
nvmem_device_cell_read(struct nvmem_device
*nvmem
,
153 struct nvmem_cell_info
*info
,
159 static inline int nvmem_device_cell_write(struct nvmem_device
*nvmem
,
160 struct nvmem_cell_info
*info
,
166 static inline int nvmem_device_read(struct nvmem_device
*nvmem
,
167 unsigned int offset
, size_t bytes
,
173 static inline int nvmem_device_write(struct nvmem_device
*nvmem
,
174 unsigned int offset
, size_t bytes
,
180 static inline const char *nvmem_dev_name(struct nvmem_device
*nvmem
)
186 nvmem_add_cell_lookups(struct nvmem_cell_lookup
*entries
, size_t nentries
) {}
188 nvmem_del_cell_lookups(struct nvmem_cell_lookup
*entries
, size_t nentries
) {}
190 static inline int nvmem_register_notifier(struct notifier_block
*nb
)
195 static inline int nvmem_unregister_notifier(struct notifier_block
*nb
)
200 #endif /* CONFIG_NVMEM */
202 #if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF)
203 struct nvmem_cell
*of_nvmem_cell_get(struct device_node
*np
,
205 struct nvmem_device
*of_nvmem_device_get(struct device_node
*np
,
208 static inline struct nvmem_cell
*of_nvmem_cell_get(struct device_node
*np
,
211 return ERR_PTR(-EOPNOTSUPP
);
214 static inline struct nvmem_device
*of_nvmem_device_get(struct device_node
*np
,
217 return ERR_PTR(-EOPNOTSUPP
);
219 #endif /* CONFIG_NVMEM && CONFIG_OF */
221 #endif /* ifndef _LINUX_NVMEM_CONSUMER_H */