2 * Register map access API internal header
4 * Copyright 2011 Wolfson Microelectronics plc
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #ifndef _REGMAP_INTERNAL_H
14 #define _REGMAP_INTERNAL_H
16 #include <linux/regmap.h>
22 struct regmap_format {
26 void (*format_write)(struct regmap *map,
27 unsigned int reg, unsigned int val);
28 void (*format_reg)(void *buf, unsigned int reg);
29 void (*format_val)(void *buf, unsigned int val);
30 unsigned int (*parse_val)(void *buf);
36 struct device *dev; /* Device we do I/O on */
37 void *work_buf; /* Scratch buffer used to format I/O */
38 struct regmap_format format; /* Buffer format */
39 const struct regmap_bus *bus;
41 #ifdef CONFIG_DEBUG_FS
42 struct dentry *debugfs;
45 unsigned int max_register;
46 bool (*writeable_reg)(struct device *dev, unsigned int reg);
47 bool (*readable_reg)(struct device *dev, unsigned int reg);
48 bool (*volatile_reg)(struct device *dev, unsigned int reg);
49 bool (*precious_reg)(struct device *dev, unsigned int reg);
54 /* regcache specific members */
55 const struct regcache_ops *cache_ops;
56 enum regcache_type cache_type;
58 /* number of bytes in reg_defaults_raw */
59 unsigned int cache_size_raw;
60 /* number of bytes per word in reg_defaults_raw */
61 unsigned int cache_word_size;
62 /* number of entries in reg_defaults */
63 unsigned int num_reg_defaults;
64 /* number of entries in reg_defaults_raw */
65 unsigned int num_reg_defaults_raw;
67 /* if set, only the cache is modified not the HW */
68 unsigned int cache_only:1;
69 /* if set, only the HW is modified not the cache */
70 unsigned int cache_bypass:1;
71 /* if set, remember to free reg_defaults_raw */
72 unsigned int cache_free:1;
74 struct reg_default *reg_defaults;
75 const void *reg_defaults_raw;
82 enum regcache_type type;
83 int (*init)(struct regmap *map);
84 int (*exit)(struct regmap *map);
85 int (*read)(struct regmap *map, unsigned int reg, unsigned int *value);
86 int (*write)(struct regmap *map, unsigned int reg, unsigned int value);
87 int (*sync)(struct regmap *map);
90 bool regmap_writeable(struct regmap *map, unsigned int reg);
91 bool regmap_readable(struct regmap *map, unsigned int reg);
92 bool regmap_volatile(struct regmap *map, unsigned int reg);
93 bool regmap_precious(struct regmap *map, unsigned int reg);
95 int _regmap_write(struct regmap *map, unsigned int reg,
98 #ifdef CONFIG_DEBUG_FS
99 extern void regmap_debugfs_initcall(void);
100 extern void regmap_debugfs_init(struct regmap *map);
101 extern void regmap_debugfs_exit(struct regmap *map);
103 static inline void regmap_debugfs_initcall(void) { }
104 static inline void regmap_debugfs_init(struct regmap *map) { }
105 static inline void regmap_debugfs_exit(struct regmap *map) { }
108 /* regcache core declarations */
109 int regcache_init(struct regmap *map, const struct regmap_config *config);
110 void regcache_exit(struct regmap *map);
111 int regcache_read(struct regmap *map,
112 unsigned int reg, unsigned int *value);
113 int regcache_write(struct regmap *map,
114 unsigned int reg, unsigned int value);
115 int regcache_sync(struct regmap *map);
117 unsigned int regcache_get_val(const void *base, unsigned int idx,
118 unsigned int word_size);
119 bool regcache_set_val(void *base, unsigned int idx,
120 unsigned int val, unsigned int word_size);
121 int regcache_lookup_reg(struct regmap *map, unsigned int reg);
122 int regcache_insert_reg(struct regmap *map, unsigned int reg,
125 extern struct regcache_ops regcache_indexed_ops;
126 extern struct regcache_ops regcache_rbtree_ops;
127 extern struct regcache_ops regcache_lzo_ops;