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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 | #include <linux/err.h> | |
16 | #include <linux/errno.h> | |
17 | ||
18 | struct nvmem_device; | |
19 | struct nvmem_cell_info; | |
20 | typedef int (*nvmem_reg_read_t)(void *priv, unsigned int offset, | |
21 | void *val, size_t bytes); | |
22 | typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset, | |
23 | void *val, size_t bytes); | |
24 | ||
25 | struct nvmem_config { | |
26 | struct device *dev; | |
27 | const char *name; | |
28 | int id; | |
29 | struct module *owner; | |
30 | const struct nvmem_cell_info *cells; | |
31 | int ncells; | |
32 | bool read_only; | |
33 | bool root_only; | |
34 | nvmem_reg_read_t reg_read; | |
35 | nvmem_reg_write_t reg_write; | |
36 | int size; | |
37 | int word_size; | |
38 | int stride; | |
39 | void *priv; | |
40 | /* To be only used by old driver/misc/eeprom drivers */ | |
41 | bool compat; | |
42 | struct device *base_dev; | |
43 | }; | |
44 | ||
45 | #if IS_ENABLED(CONFIG_NVMEM) | |
46 | ||
47 | struct nvmem_device *nvmem_register(const struct nvmem_config *cfg); | |
48 | int nvmem_unregister(struct nvmem_device *nvmem); | |
49 | ||
50 | #else | |
51 | ||
52 | static inline struct nvmem_device *nvmem_register(const struct nvmem_config *c) | |
53 | { | |
54 | return ERR_PTR(-ENOSYS); | |
55 | } | |
56 | ||
57 | static inline int nvmem_unregister(struct nvmem_device *nvmem) | |
58 | { | |
59 | return -ENOSYS; | |
60 | } | |
61 | ||
62 | #endif /* CONFIG_NVMEM */ | |
63 | #endif /* ifndef _LINUX_NVMEM_PROVIDER_H */ |