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regmap: Share some of the debugfs infrastructure ready for more files

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Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2011-08-10 17:15:31 +09:00
parent 8de2f081ef
commit 21f5554456
1 changed files with 10 additions and 4 deletions
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14
drivers/base/regmap/regmap-debugfs.c
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@ -20,7 +20,14 @@
static struct dentry *regmap_debugfs_root; static struct dentry *regmap_debugfs_root;
static int regmap_map_open_file(struct inode *inode, struct file *file) /* Calculate the length of a fixed format */
static size_t regmap_calc_reg_len(int max_val, char *buf, size_t buf_size)
{
snprintf(buf, buf_size, "%x", max_val);
return strlen(buf);
}
static int regmap_open_file(struct inode *inode, struct file *file)
{ {
file->private_data = inode->i_private; file->private_data = inode->i_private;
return 0; return 0;
@ -46,8 +53,7 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,
return -ENOMEM; return -ENOMEM;
/* Calculate the length of a fixed format */ /* Calculate the length of a fixed format */
snprintf(buf, count, "%x", map->max_register); reg_len = regmap_calc_reg_len(map->max_register, buf, count);
reg_len = strlen(buf);
val_len = 2 * map->format.val_bytes; val_len = 2 * map->format.val_bytes;
tot_len = reg_len + val_len + 3; /* : \n */ tot_len = reg_len + val_len + 3; /* : \n */
@ -98,7 +104,7 @@ out:
} }
static const struct file_operations regmap_map_fops = { static const struct file_operations regmap_map_fops = {
.open = regmap_map_open_file, .open = regmap_open_file,
.read = regmap_map_read_file, .read = regmap_map_read_file,
.llseek = default_llseek, .llseek = default_llseek,
}; };