On Wed, Feb 22, 2012 at 01:53:03PM +0000, Dimitris Papastamos wrote:

>  void regmap_debugfs_init(struct regmap *map)
>  {
> -	map->debugfs = debugfs_create_dir(dev_name(map->dev),
> -					  regmap_debugfs_root);
> +	char name[64];

That's a magic number, where did it come from?

> +
> +	snprintf(name, sizeof(name), "%s-%s",
> +		 dev_name(map->dev), map->dev->driver->name);
> +
> +	map->debugfs = debugfs_create_dir(name, regmap_debugfs_root);

No, keep the directory name the same and add a new file.