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Srinivas Kandagatlaeace75c2015-07-27 12:13:19 +01001/*
2 * nvmem framework consumer.
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_CONSUMER_H
13#define _LINUX_NVMEM_CONSUMER_H
14
Srinivas Kandagatla69aba792015-07-27 12:13:34 +010015struct device;
16struct device_node;
17/* consumer cookie */
18struct nvmem_cell;
Srinivas Kandagatlae2a54022015-07-27 12:13:45 +010019struct nvmem_device;
Srinivas Kandagatla69aba792015-07-27 12:13:34 +010020
Srinivas Kandagatlaeace75c2015-07-27 12:13:19 +010021struct nvmem_cell_info {
22 const char *name;
23 unsigned int offset;
24 unsigned int bytes;
25 unsigned int bit_offset;
26 unsigned int nbits;
27};
28
Srinivas Kandagatla69aba792015-07-27 12:13:34 +010029#if IS_ENABLED(CONFIG_NVMEM)
30
31/* Cell based interface */
32struct nvmem_cell *nvmem_cell_get(struct device *dev, const char *name);
33struct nvmem_cell *devm_nvmem_cell_get(struct device *dev, const char *name);
34void nvmem_cell_put(struct nvmem_cell *cell);
35void devm_nvmem_cell_put(struct device *dev, struct nvmem_cell *cell);
36void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len);
37int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len);
38
Srinivas Kandagatlae2a54022015-07-27 12:13:45 +010039/* direct nvmem device read/write interface */
40struct nvmem_device *nvmem_device_get(struct device *dev, const char *name);
41struct nvmem_device *devm_nvmem_device_get(struct device *dev,
42 const char *name);
43void nvmem_device_put(struct nvmem_device *nvmem);
44void devm_nvmem_device_put(struct device *dev, struct nvmem_device *nvmem);
45int nvmem_device_read(struct nvmem_device *nvmem, unsigned int offset,
46 size_t bytes, void *buf);
47int nvmem_device_write(struct nvmem_device *nvmem, unsigned int offset,
48 size_t bytes, void *buf);
49ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem,
50 struct nvmem_cell_info *info, void *buf);
51int nvmem_device_cell_write(struct nvmem_device *nvmem,
52 struct nvmem_cell_info *info, void *buf);
53
Srinivas Kandagatla69aba792015-07-27 12:13:34 +010054#else
55
56static inline struct nvmem_cell *nvmem_cell_get(struct device *dev,
57 const char *name)
58{
59 return ERR_PTR(-ENOSYS);
60}
61
62static inline struct nvmem_cell *devm_nvmem_cell_get(struct device *dev,
63 const char *name)
64{
65 return ERR_PTR(-ENOSYS);
66}
67
68static inline void devm_nvmem_cell_put(struct device *dev,
69 struct nvmem_cell *cell)
70{
71
72}
73static inline void nvmem_cell_put(struct nvmem_cell *cell)
74{
75}
76
77static inline char *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)
78{
79 return ERR_PTR(-ENOSYS);
80}
81
82static inline int nvmem_cell_write(struct nvmem_cell *cell,
83 const char *buf, size_t len)
84{
85 return -ENOSYS;
86}
Srinivas Kandagatlae2a54022015-07-27 12:13:45 +010087
88static inline struct nvmem_device *nvmem_device_get(struct device *dev,
89 const char *name)
90{
91 return ERR_PTR(-ENOSYS);
92}
93
94static inline struct nvmem_device *devm_nvmem_device_get(struct device *dev,
95 const char *name)
96{
97 return ERR_PTR(-ENOSYS);
98}
99
100static inline void nvmem_device_put(struct nvmem_device *nvmem)
101{
102}
103
104static inline void devm_nvmem_device_put(struct device *dev,
105 struct nvmem_device *nvmem)
106{
107}
108
109static inline ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem,
110 struct nvmem_cell_info *info,
111 void *buf)
112{
113 return -ENOSYS;
114}
115
116static inline int nvmem_device_cell_write(struct nvmem_device *nvmem,
117 struct nvmem_cell_info *info,
118 void *buf)
119{
120 return -ENOSYS;
121}
122
123static inline int nvmem_device_read(struct nvmem_device *nvmem,
124 unsigned int offset, size_t bytes,
125 void *buf)
126{
127 return -ENOSYS;
128}
129
130static inline int nvmem_device_write(struct nvmem_device *nvmem,
131 unsigned int offset, size_t bytes,
132 void *buf)
133{
134 return -ENOSYS;
135}
Srinivas Kandagatla69aba792015-07-27 12:13:34 +0100136#endif /* CONFIG_NVMEM */
137
138#if IS_ENABLED(CONFIG_NVMEM) && IS_ENABLED(CONFIG_OF)
139struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
140 const char *name);
Srinivas Kandagatlae2a54022015-07-27 12:13:45 +0100141struct nvmem_device *of_nvmem_device_get(struct device_node *np,
142 const char *name);
Srinivas Kandagatla69aba792015-07-27 12:13:34 +0100143#else
144static inline struct nvmem_cell *of_nvmem_cell_get(struct device_node *np,
145 const char *name)
146{
147 return ERR_PTR(-ENOSYS);
148}
Srinivas Kandagatlae2a54022015-07-27 12:13:45 +0100149
150static inline struct nvmem_device *of_nvmem_device_get(struct device_node *np,
151 const char *name)
152{
153 return ERR_PTR(-ENOSYS);
154}
Srinivas Kandagatla69aba792015-07-27 12:13:34 +0100155#endif /* CONFIG_NVMEM && CONFIG_OF */
156
Srinivas Kandagatlaeace75c2015-07-27 12:13:19 +0100157#endif /* ifndef _LINUX_NVMEM_CONSUMER_H */