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regmap: Provide debugfs read of register ranges

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If a register range is named then provide a debugfs file showing the
contents of the range separately.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2012-10-03 13:13:16 +01:00
parent bd9cc12f4a
commit 4b020b3f9b
3 changed files with 33 additions and 0 deletions
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1
drivers/base/regmap/internal.h
View file

@ -121,6 +121,7 @@ int _regmap_write(struct regmap *map, unsigned int reg,
struct regmap_range_node {
struct rb_node node;
const char *name;
struct regmap *map;
unsigned int range_min;
unsigned int range_max;

31
drivers/base/regmap/regmap-debugfs.c
View file

@ -183,6 +183,22 @@ static const struct file_operations regmap_map_fops = {
.llseek = default_llseek,
};
static ssize_t regmap_range_read_file(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct regmap_range_node *range = file->private_data;
struct regmap *map = range->map;
return regmap_read_debugfs(map, range->range_min, range->range_max,
user_buf, count, ppos);
}
static const struct file_operations regmap_range_fops = {
.open = simple_open,
.read = regmap_range_read_file,
.llseek = default_llseek,
};
static ssize_t regmap_access_read_file(struct file *file,
char __user *user_buf, size_t count,
loff_t *ppos)
@ -253,6 +269,9 @@ static const struct file_operations regmap_access_fops = {
void regmap_debugfs_init(struct regmap *map, const char *name)
{
struct rb_node *next;
struct regmap_range_node *range_node;
if (name) {
map->debugfs_name = kasprintf(GFP_KERNEL, "%s-%s",
dev_name(map->dev), name);
@ -285,6 +304,18 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
debugfs_create_bool("cache_bypass", 0400, map->debugfs,
&map->cache_bypass);
}
next = rb_first(&map->range_tree);
while (next) {
range_node = rb_entry(next, struct regmap_range_node, node);
if (range_node->name)
debugfs_create_file(range_node->name, 0400,
map->debugfs, range_node,
&regmap_range_fops);
next = rb_next(&range_node->node);
}
}
void regmap_debugfs_exit(struct regmap *map)

1
drivers/base/regmap/regmap.c
View file

@ -579,6 +579,7 @@ struct regmap *regmap_init(struct device *dev,
goto err_range;
}
new->map = map;
new->name = range_cfg->name;
new->range_min = range_cfg->range_min;
new->range_max = range_cfg->range_max;