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Srinivas Kandagatlaeace75c2015-07-27 12:13:19 +01001/*
2 * nvmem framework provider.
3 *
4 * Copyright (C) 2015 Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
5 * Copyright (C) 2013 Maxime Ripard <maxime.ripard@free-electrons.com>
6 *
7 * This file is licensed under the terms of the GNU General Public
8 * License version 2. This program is licensed "as is" without any
9 * warranty of any kind, whether express or implied.
10 */
11
12#ifndef _LINUX_NVMEM_PROVIDER_H
13#define _LINUX_NVMEM_PROVIDER_H
14
15struct nvmem_device;
16struct nvmem_cell_info;
Srinivas Kandagatla795ddd12016-04-24 20:28:05 +010017typedef int (*nvmem_reg_read_t)(void *priv, unsigned int offset,
18 void *val, size_t bytes);
19typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset,
20 void *val, size_t bytes);
Srinivas Kandagatlaeace75c2015-07-27 12:13:19 +010021
22struct nvmem_config {
23 struct device *dev;
24 const char *name;
25 int id;
26 struct module *owner;
27 const struct nvmem_cell_info *cells;
28 int ncells;
29 bool read_only;
Andrew Lunn811b0d62016-02-26 20:59:18 +010030 bool root_only;
Srinivas Kandagatla795ddd12016-04-24 20:28:05 +010031 nvmem_reg_read_t reg_read;
32 nvmem_reg_write_t reg_write;
33 int size;
34 int word_size;
35 int stride;
36 void *priv;
Andrew Lunnb6c217a2016-02-26 20:59:19 +010037 /* To be only used by old driver/misc/eeprom drivers */
38 bool compat;
39 struct device *base_dev;
Srinivas Kandagatlaeace75c2015-07-27 12:13:19 +010040};
41
42#if IS_ENABLED(CONFIG_NVMEM)
43
44struct nvmem_device *nvmem_register(const struct nvmem_config *cfg);
45int nvmem_unregister(struct nvmem_device *nvmem);
46
47#else
48
49static inline struct nvmem_device *nvmem_register(const struct nvmem_config *c)
50{
51 return ERR_PTR(-ENOSYS);
52}
53
54static inline int nvmem_unregister(struct nvmem_device *nvmem)
55{
56 return -ENOSYS;
57}
58
59#endif /* CONFIG_NVMEM */
Srinivas Kandagatlaeace75c2015-07-27 12:13:19 +010060#endif /* ifndef _LINUX_NVMEM_PROVIDER_H */