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regmap: Add functions to check for access on registers

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We're going to be using these in quite a few places so factor out the
readable/writable/volatile/precious checks.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2011-08-10 17:14:41 +09:00
parent 13c54137f7
commit 8de2f081ef
3 changed files with 51 additions and 4 deletions
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5
drivers/base/regmap/internal.h
View file

@ -48,6 +48,11 @@ struct regmap {
bool (*precious_reg)(struct device *dev, unsigned int reg);
};
bool regmap_writeable(struct regmap *map, unsigned int reg);
bool regmap_readable(struct regmap *map, unsigned int reg);
bool regmap_volatile(struct regmap *map, unsigned int reg);
bool regmap_precious(struct regmap *map, unsigned int reg);
#ifdef CONFIG_DEBUG_FS
extern void regmap_debugfs_initcall(void);
extern void regmap_debugfs_init(struct regmap *map);

6
drivers/base/regmap/regmap-debugfs.c
View file

@ -52,12 +52,10 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,
tot_len = reg_len + val_len + 3; /* : \n */
for (i = 0; i < map->max_register; i++) {
if (map->readable_reg &&
!map->readable_reg(map->dev, i))
if (!regmap_readable(map, i))
continue;
if (map->precious_reg &&
map->precious_reg(map->dev, i))
if (regmap_precious(map, i))
continue;
/* If we're in the region the user is trying to read */

44
drivers/base/regmap/regmap.c
View file

@ -20,6 +20,50 @@
#include "internal.h"
bool regmap_writeable(struct regmap *map, unsigned int reg)
{
if (map->max_register && reg > map->max_register)
return false;
if (map->writeable_reg)
return map->writeable_reg(map->dev, reg);
return true;
}
bool regmap_readable(struct regmap *map, unsigned int reg)
{
if (map->max_register && reg > map->max_register)
return false;
if (map->readable_reg)
return map->readable_reg(map->dev, reg);
return true;
}
bool regmap_volatile(struct regmap *map, unsigned int reg)
{
if (map->max_register && reg > map->max_register)
return false;
if (map->volatile_reg)
return map->volatile_reg(map->dev, reg);
return true;
}
bool regmap_precious(struct regmap *map, unsigned int reg)
{
if (map->max_register && reg > map->max_register)
return false;
if (map->precious_reg)
return map->precious_reg(map->dev, reg);
return false;
}
static void regmap_format_4_12_write(struct regmap *map,
unsigned int reg, unsigned int val)
{