Merge remote-tracking branches 'spi/topic/devprop', 'spi/topic/fsl', 'spi/topic/fsl...
[sfrench/cifs-2.6.git] / include / linux / nvmem-provider.h
1 /*
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
15 struct nvmem_device;
16 struct nvmem_cell_info;
17 typedef int (*nvmem_reg_read_t)(void *priv, unsigned int offset,
18                                 void *val, size_t bytes);
19 typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset,
20                                  void *val, size_t bytes);
21
22 struct 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;
30         bool                    root_only;
31         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;
37         /* To be only used by old driver/misc/eeprom drivers */
38         bool                    compat;
39         struct device           *base_dev;
40 };
41
42 #if IS_ENABLED(CONFIG_NVMEM)
43
44 struct nvmem_device *nvmem_register(const struct nvmem_config *cfg);
45 int nvmem_unregister(struct nvmem_device *nvmem);
46
47 #else
48
49 static inline struct nvmem_device *nvmem_register(const struct nvmem_config *c)
50 {
51         return ERR_PTR(-ENOSYS);
52 }
53
54 static inline int nvmem_unregister(struct nvmem_device *nvmem)
55 {
56         return -ENOSYS;
57 }
58
59 #endif /* CONFIG_NVMEM */
60 #endif  /* ifndef _LINUX_NVMEM_PROVIDER_H */