Re: [PATCH 0/2] of: dynamic: restrict overlay by targets

Frank Rowand
2017-12-06T11:58:41Z

On 12/05/17 12:07, Alan Tull wrote:
> On Mon, Dec 4, 2017 at 7:14 PM, Frank Rowand <frowand.list@gmail.com> wrote:
>> Hi Alan,
>>
>> In the RFC thread "of: Add whitelist", I did not understand the use case and
>> asked you some questions (30 Nov 2017 07:46:36 -0500), that you seem to have
>> overlooked (or my mail server failed to deliver your answer to me). Can you
>> please answer that question so I can better understand this patch set is
>> needed for.
>
> Hi Frank,
>
> Sorry I missed those, I've replied to the original questions now.

Thanks! I have now replied to several comments in that thread, hoping to keep
the conversation in one thread instead of split across two threads.

-Frank

>
> Alan
>
>>
>> Thanks,
>>
>> Frank
>>
>>
>> On 12/04/17 14:13, Alan Tull wrote:
>>> Restrict which nodes are valid targets for a DT overlay.
>>>
>>> Add a flag bit to struct device_node allowing nodes to be marked as
>>> valid target for overlays.
>>>
>>> A driver that is always intended to handle DT overlays can
>>> enable overlays by calling a function for its DT node.
>>>
>>> For individual nodes that need to be opened up for a specific use,
>>> adding the property "overlay-allowed" enables overlays targeting
>>> that node. I'll need to document the DT property, not sure where
>>> specifically. New file bindings/overlay.txt?
>>>
>>> This patchset differs from the RFC:
>>> * Added a flag bit and got rid of the whitelist
>>> * Renamed the functions that enable a node
>>> * Added a DT property
>>>
>>> Alan Tull (2):
>>> of: overlay: add flag enabling overlays and enable fpga-region
>>> overlays
>>> of: dynamic: add overlay-allowed DT property
>>>
>>> drivers/fpga/of-fpga-region.c | 4 ++++
>>> drivers/of/base.c | 4 ++--
>>> drivers/of/dynamic.c | 3 +++
>>> drivers/of/fdt.c | 3 +++
>>> drivers/of/of_private.h | 2 ++
>>> drivers/of/overlay.c | 26 ++++++++++++++++++++++++++
>>> include/linux/of.h | 19 +++++++++++++++++++
>>> 7 files changed, 59 insertions(+), 2 deletions(-)
>>>
>>
>