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: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index a67dc68..5ab3fef 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -48,6 +48,11 @@
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);
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 6e304a4..fff8e83 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -52,12 +52,10 @@
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 */
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index d74d306..fa2bd89 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -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)
{