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
;
49 #ifdef CONFIG_DEBUG_FS
50 struct dentry
*debugfs
;
51 const char *debugfs_name
;
54 unsigned int max_register
;
55 bool (*writeable_reg
)(struct device
*dev
, unsigned int reg
);
56 bool (*readable_reg
)(struct device
*dev
, unsigned int reg
);
57 bool (*volatile_reg
)(struct device
*dev
, unsigned int reg
);
58 bool (*precious_reg
)(struct device
*dev
, unsigned int reg
);
63 /* number of bits to (left) shift the reg value when formatting*/
67 /* regcache specific members */
68 const struct regcache_ops
*cache_ops
;
69 enum regcache_type cache_type
;
71 /* number of bytes in reg_defaults_raw */
72 unsigned int cache_size_raw
;
73 /* number of bytes per word in reg_defaults_raw */
74 unsigned int cache_word_size
;
75 /* number of entries in reg_defaults */
76 unsigned int num_reg_defaults
;
77 /* number of entries in reg_defaults_raw */
78 unsigned int num_reg_defaults_raw
;
80 /* if set, only the cache is modified not the HW */
82 /* if set, only the HW is modified not the cache */
84 /* if set, remember to free reg_defaults_raw */
87 struct reg_default
*reg_defaults
;
88 const void *reg_defaults_raw
;
92 struct reg_default
*patch
;
95 /* if set, converts bulk rw to single rw */
101 enum regcache_type type
;
102 int (*init
)(struct regmap
*map
);
103 int (*exit
)(struct regmap
*map
);
104 int (*read
)(struct regmap
*map
, unsigned int reg
, unsigned int *value
);
105 int (*write
)(struct regmap
*map
, unsigned int reg
, unsigned int value
);
106 int (*sync
)(struct regmap
*map
, unsigned int min
, unsigned int max
);
109 bool regmap_writeable(struct regmap
*map
, unsigned int reg
);
110 bool regmap_readable(struct regmap
*map
, unsigned int reg
);
111 bool regmap_volatile(struct regmap
*map
, unsigned int reg
);
112 bool regmap_precious(struct regmap
*map
, unsigned int reg
);
114 int _regmap_write(struct regmap
*map
, unsigned int reg
,
117 #ifdef CONFIG_DEBUG_FS
118 extern void regmap_debugfs_initcall(void);
119 extern void regmap_debugfs_init(struct regmap
*map
, const char *name
);
120 extern void regmap_debugfs_exit(struct regmap
*map
);
122 static inline void regmap_debugfs_initcall(void) { }
123 static inline void regmap_debugfs_init(struct regmap
*map
, const char *name
) { }
124 static inline void regmap_debugfs_exit(struct regmap
*map
) { }
127 /* regcache core declarations */
128 int regcache_init(struct regmap
*map
, const struct regmap_config
*config
);
129 void regcache_exit(struct regmap
*map
);
130 int regcache_read(struct regmap
*map
,
131 unsigned int reg
, unsigned int *value
);
132 int regcache_write(struct regmap
*map
,
133 unsigned int reg
, unsigned int value
);
134 int regcache_sync(struct regmap
*map
);
136 unsigned int regcache_get_val(const void *base
, unsigned int idx
,
137 unsigned int word_size
);
138 bool regcache_set_val(void *base
, unsigned int idx
,
139 unsigned int val
, unsigned int word_size
);
140 int regcache_lookup_reg(struct regmap
*map
, unsigned int reg
);
142 extern struct regcache_ops regcache_rbtree_ops
;
143 extern struct regcache_ops regcache_lzo_ops
;