Re: [PATCH] drivers/of: Add devm_of_iomap()

From: Andy Shevchenko
Date: Tue Jun 12 2018 - 04:35:26 EST

On Tue, Jun 12, 2018 at 3:01 AM, Benjamin Herrenschmidt
<benh@xxxxxxxxxxxxxxxxxxx> wrote:
> There are still quite a few cases where a device might want to get to a
> different node of the device-tree, obtain the resources and map them.
> Drivers doing that currently open code the whole thing, which is error
> proe.


> We have of_iomap() and of_io_request_and_map() but they both have shortcomings,
> such as not returning the size of the resource found (which can be necessary)
> and not being "managed".
> This adds a devm_of_iomap() that provides all of these and should probably
> replace uses of the above in most drivers.

It feels like a wrong approach.
Can OF graph help here? Would it be better approach?

With Best Regards,
Andy Shevchenko