Commit 8de2f081 authored by Mark Brown's avatar Mark Brown

regmap: Add functions to check for access on registers

We're going to be using these in quite a few places so factor out the
readable/writable/volatile/precious checks.
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 13c54137
...@@ -48,6 +48,11 @@ struct regmap { ...@@ -48,6 +48,11 @@ struct regmap {
bool (*precious_reg)(struct device *dev, unsigned int reg); 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 #ifdef CONFIG_DEBUG_FS
extern void regmap_debugfs_initcall(void); extern void regmap_debugfs_initcall(void);
extern void regmap_debugfs_init(struct regmap *map); extern void regmap_debugfs_init(struct regmap *map);
......
...@@ -52,12 +52,10 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf, ...@@ -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 */ tot_len = reg_len + val_len + 3; /* : \n */
for (i = 0; i < map->max_register; i++) { for (i = 0; i < map->max_register; i++) {
if (map->readable_reg && if (!regmap_readable(map, i))
!map->readable_reg(map->dev, i))
continue; continue;
if (map->precious_reg && if (regmap_precious(map, i))
map->precious_reg(map->dev, i))
continue; continue;
/* If we're in the region the user is trying to read */ /* If we're in the region the user is trying to read */
......
...@@ -20,6 +20,50 @@ ...@@ -20,6 +20,50 @@
#include "internal.h" #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, static void regmap_format_4_12_write(struct regmap *map,
unsigned int reg, unsigned int val) unsigned int reg, unsigned int val)
{ {
......
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