linux-kernel - Re: [PATCH v4 4/5] dm: pci: Assign controller device node to root bridge

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Date:   Tue, 16 Jun 2020 16:09:49 +0200
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     Simon Glass <sjg@...omium.org>
Cc:     Matthias Brugger <mbrugger@...e.com>,
        U-Boot Mailing List <u-boot@...ts.denx.de>,
        Bin Meng <bmeng.cn@...il.com>, Marek Vasut <marex@...x.de>,
        lk <linux-kernel@...r.kernel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Mark Kettenis <mark.kettenis@...all.nl>
Subject: Re: [PATCH v4 4/5] dm: pci: Assign controller device node to root
 bridge

On Tue, 2020-06-16 at 07:43 -0600, Simon Glass wrote:
> Hi Nicolas,
> 
> On Fri, 12 Jun 2020 at 10:47, Nicolas Saenz Julienne
> <nsaenzjulienne@...e.de> wrote:
> > There is no distinction in DT between the PCI controller device and the
> > root bridge, whereas such distinction exists from dm's perspective. Make
> > sure the root bridge ofnode is assigned to the controller's platform
> > device node.
> > 
> > This permits setups like this to work correctly:
> > 
> >         pcie {
> >                 compatible = "...";
> >                 ...
> >                 dev {
> >                         reg = <0 0 0 0 0>;
> >                         ...
> >                 };
> >         };
> > 
> > Without this the dev node is assigned to the root bridge and the
> > actual device search starts one level lower than expected.
> > 
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
> > ---
> >  drivers/pci/pci-uclass.c | 15 ++++++++++++++-
> >  1 file changed, 14 insertions(+), 1 deletion(-)
> 
> Can you update the tests to handle this case please?

I'd be glad to, but I'm not familiar with the test FW in u-booy, coud give me
some pointers on where/how to test this?

Regards,
Nicolas


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