On Wed, Jan 08, 2014 at 05:31:37PM +0000, Pawel Moll wrote:
> On Tue, 2013-12-24 at 12:19 +0000, Mark Brown wrote:

> > No, we need to find a better way of doing this such as checking to see
> > if register zero is accessible in some way.  We want to avoid having
> > those files if there's no way of populating them since this is useful
> > information for tooling.

> Something like this then?

> diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
> index c5471cd..45d812c 100644
> --- a/drivers/base/regmap/regmap-debugfs.c
> +++ b/drivers/base/regmap/regmap-debugfs.c
> @@ -511,7 +511,7 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
>  	debugfs_create_file("range", 0400, map->debugfs,
>  			    map, &regmap_reg_ranges_fops);
>  
> -	if (map->max_register) {
> +	if (map->max_register || regmap_readable(map, 0)) {

Yes.