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Message-ID: <CAL_JsqL=HbCbu3kACEc0_BNXGnapdcGz3J+2-dfXQxjyvBqD6A@mail.gmail.com>
Date: Wed, 17 Jan 2024 17:38:27 -0600
From: Rob Herring <robh+dt@...nel.org>
To: Lukas Wunner <lukas@...ner.de>
Cc: Bartosz Golaszewski <brgl@...ev.pl>, Kalle Valo <kvalo@...nel.org>,
"David S . Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>,
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linux-arm-kernel@...ts.infradead.org, linux-pci@...r.kernel.org,
Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [RFC 3/9] PCI/portdrv: create platform devices for child OF nodes
On Fri, Jan 12, 2024 at 3:43 AM Lukas Wunner <lukas@...ner.de> wrote:
>
> On Thu, Jan 11, 2024 at 05:16:45PM +0100, Bartosz Golaszewski wrote:
> > On Thu, Jan 11, 2024 at 4:02???PM Lukas Wunner <lukas@...ner.de> wrote:
> > > On Wed, Jan 10, 2024 at 05:26:52PM +0100, Bartosz Golaszewski wrote:
> > > > if (pci_is_bridge(dev))
> > > > of_pci_make_dev_node(dev);
> > >
> > > But perhaps of_pci_make_dev_node() returns immediately because:
> >
> > No, it was actually a no-op due to CONFIG_PCI_DYNAMIC_OF_NODES not
> > being set. But this is only available if CONFIG_OF_DYNAMIC is enabled
> > which requires OF_UNITTEST (!).
> >
> > We definitely don't need to enable dynamic OF nodes. We don't want to
> > modify the DT, we want to create devices for existing nodes.
>
> Consider refactoring of_pci_make_dev_node() to suit your needs or
> add a separate function call inside the "if (pci_is_bridge(dev))"
> clause which populates the child OF nodes.
The latter because of_pci_make_dev_node() has absolutely nothing to do
with the issue this series solves. The uses are pretty much mutually
exclusive. If we have a DT node with power related properties, there
is no need to create that node because it already exists.
Rob
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