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
{
27 void (*format_write
)(struct regmap
*map
,
28 unsigned int reg
, unsigned int val
);
29 void (*format_reg
)(void *buf
, unsigned int reg
, unsigned int shift
);
30 void (*format_val
)(void *buf
, unsigned int val
, unsigned int shift
);
31 unsigned int (*parse_val
)(void *buf
);
34 typedef void (*regmap_lock
)(struct regmap
*map
);
35 typedef void (*regmap_unlock
)(struct regmap
*map
);
43 struct device
*dev
; /* Device we do I/O on */
44 void *work_buf
; /* Scratch buffer used to format I/O */
45 struct regmap_format format
; /* Buffer format */
46 const struct regmap_bus
*bus
;
50 #ifdef CONFIG_DEBUG_FS
51 struct dentry
*debugfs
;
52 const char *debugfs_name
;
55 unsigned int max_register
;
56 bool (*writeable_reg
)(struct device
*dev
, unsigned int reg
);
57 bool (*readable_reg
)(struct device
*dev
, unsigned int reg
);
58 bool (*volatile_reg
)(struct device
*dev
, unsigned int reg
);
59 bool (*precious_reg
)(struct device
*dev
, unsigned int reg
);
64 /* number of bits to (left) shift the reg value when formatting*/
68 /* regcache specific members */
69 const struct regcache_ops
*cache_ops
;
70 enum regcache_type cache_type
;
72 /* number of bytes in reg_defaults_raw */
73 unsigned int cache_size_raw
;
74 /* number of bytes per word in reg_defaults_raw */
75 unsigned int cache_word_size
;
76 /* number of entries in reg_defaults */
77 unsigned int num_reg_defaults
;
78 /* number of entries in reg_defaults_raw */
79 unsigned int num_reg_defaults_raw
;
81 /* if set, only the cache is modified not the HW */
83 /* if set, only the HW is modified not the cache */
85 /* if set, remember to free reg_defaults_raw */
88 struct reg_default
*reg_defaults
;
89 const void *reg_defaults_raw
;
93 struct reg_default
*patch
;
96 /* if set, converts bulk rw to single rw */
100 struct regcache_ops
{
102 enum regcache_type type
;
103 int (*init
)(struct regmap
*map
);
104 int (*exit
)(struct regmap
*map
);
105 int (*read
)(struct regmap
*map
, unsigned int reg
, unsigned int *value
);
106 int (*write
)(struct regmap
*map
, unsigned int reg
, unsigned int value
);
107 int (*sync
)(struct regmap
*map
, unsigned int min
, unsigned int max
);
110 bool regmap_writeable(struct regmap
*map
, unsigned int reg
);
111 bool regmap_readable(struct regmap
*map
, unsigned int reg
);
112 bool regmap_volatile(struct regmap
*map
, unsigned int reg
);
113 bool regmap_precious(struct regmap
*map
, unsigned int reg
);
115 int _regmap_write(struct regmap
*map
, unsigned int reg
,
118 #ifdef CONFIG_DEBUG_FS
119 extern void regmap_debugfs_initcall(void);
120 extern void regmap_debugfs_init(struct regmap
*map
, const char *name
);
121 extern void regmap_debugfs_exit(struct regmap
*map
);
123 static inline void regmap_debugfs_initcall(void) { }
124 static inline void regmap_debugfs_init(struct regmap
*map
, const char *name
) { }
125 static inline void regmap_debugfs_exit(struct regmap
*map
) { }
128 /* regcache core declarations */
129 int regcache_init(struct regmap
*map
, const struct regmap_config
*config
);
130 void regcache_exit(struct regmap
*map
);
131 int regcache_read(struct regmap
*map
,
132 unsigned int reg
, unsigned int *value
);
133 int regcache_write(struct regmap
*map
,
134 unsigned int reg
, unsigned int value
);
135 int regcache_sync(struct regmap
*map
);
137 unsigned int regcache_get_val(const void *base
, unsigned int idx
,
138 unsigned int word_size
);
139 bool regcache_set_val(void *base
, unsigned int idx
,
140 unsigned int val
, unsigned int word_size
);
141 int regcache_lookup_reg(struct regmap
*map
, unsigned int reg
);
143 extern struct regcache_ops regcache_rbtree_ops
;
144 extern struct regcache_ops regcache_lzo_ops
;