Re: [PATCH v3 3/7] OF: DT-Overlay configfs interface

[Sebastian Hesselbarth <sebastian.hesselbarth-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On 03/21/2014 02:39 PM, Rob Herring wrote:
> On Tue, Mar 18, 2014 at 4:56 PM, Pantelis Antoniou
> <pantelis.antoniou-OWPKS81ov/FWk0Htik3J/w@public.gmane.org> wrote:
>> Add a runtime interface to using configfs for generic device tree overlay
>> usage.
>>
>> A device-tree configfs entry is created in /config/device-tree/overlays
>>
>> To create an overlay you mkdir the directory and then echo the overlay
>> firmware file to the path property file.
>>
>>          # mkdir /config/device-tree/overlays/foo
>>          # echo foo.dtbo >/config/device-tree/overlays/foo/path
[...]
>> +static ssize_t cfs_overlay_item_status_show(struct cfs_overlay_item *overlay,
>> +               char *page)
>> +{
>> +       return sprintf(page, "%s\n",
>> +                       overlay->applied ? "applied" : "unapplied");
>> +}
>
> This needs to be added to the above mentioned documentation along with
> any other files.

It is also terrible to grep for. Maybe just have the file named
"applied" and use a bool instead?

Sebastian

>> +
>> +CFS_OVERLAY_ITEM_ATTR(path, S_IRUGO | S_IWUSR, \
>> +               cfs_overlay_item_path_show, cfs_overlay_item_path_store);
>> +CFS_OVERLAY_ITEM_ATTR_RO(status, cfs_overlay_item_status_show);
>> +
>> +static struct configfs_attribute *cfs_overlay_attrs[] = {
>> +       &cfs_overlay_item_attr_path.attr,
>> +       &cfs_overlay_item_attr_status.attr,
>> +       NULL,
>> +};

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