drivers/base/regmap/internal.h

   1 /*
   2  * Register map access API internal header
   3  *
   4  * Copyright 2011 Wolfson Microelectronics plc
   5  *
   6  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   7  *
   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.
  11  */
  12
  13 #ifndef _REGMAP_INTERNAL_H
  14 #define _REGMAP_INTERNAL_H
  15
  16 #include <linux/regmap.h>
  17 #include <linux/fs.h>
  18
  19 struct regmap;
  20
  21 struct regmap_format {
  22         size_t buf_size;
  23         size_t reg_bytes;
  24         size_t val_bytes;
  25         void (*format_write)(struct regmap *map,
  26                              unsigned int reg, unsigned int val);
  27         void (*format_reg)(void *buf, unsigned int reg);
  28         void (*format_val)(void *buf, unsigned int val);
  29         unsigned int (*parse_val)(void *buf);
  30 };
  31
  32 struct regmap {
  33         struct mutex lock;
  34
  35         struct device *dev; /* Device we do I/O on */
  36         void *work_buf;     /* Scratch buffer used to format I/O */
  37         struct regmap_format format;  /* Buffer format */
  38         const struct regmap_bus *bus;
  39
  40 #ifdef CONFIG_DEBUG_FS
  41         struct dentry *debugfs;
  42 #endif
  43
  44         unsigned int max_register;
  45         bool (*writeable_reg)(struct device *dev, unsigned int reg);
  46         bool (*readable_reg)(struct device *dev, unsigned int reg);
  47         bool (*volatile_reg)(struct device *dev, unsigned int reg);
  48         bool (*precious_reg)(struct device *dev, unsigned int reg);
  49 };
  50
  51 bool regmap_writeable(struct regmap *map, unsigned int reg);
  52 bool regmap_readable(struct regmap *map, unsigned int reg);
  53 bool regmap_volatile(struct regmap *map, unsigned int reg);
  54 bool regmap_precious(struct regmap *map, unsigned int reg);
  55
  56 #ifdef CONFIG_DEBUG_FS
  57 extern void regmap_debugfs_initcall(void);
  58 extern void regmap_debugfs_init(struct regmap *map);
  59 extern void regmap_debugfs_exit(struct regmap *map);
  60 #else
  61 void regmap_debugfs_initcall(void) { }
  62 void regmap_debugfs_init(struct regmap *map) { }
  63 void regmap_debugfs_exit(struct regmap *map) { }
  64 #endif
  65
  66 #endif