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

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;

	return 0;

		return -ENOMEM;

	/* Calculate the length of a fixed format  */

	snprintf(buf, count, "%x", map->max_register);

	reg_len = strlen(buf);

	reg_len = regmap_calc_reg_len(map->max_register, buf, count);

	val_len = 2 * map->format.val_bytes;

	tot_len = reg_len + val_len + 3;      /* : \n */

}

static const struct file_operations regmap_map_fops = {

	.open = regmap_map_open_file,

	.open = regmap_open_file,

	.read = regmap_map_read_file,

	.llseek = default_llseek,

};