Received-SPF: pass (google.com: domain of linux-wireless+bounces-2129-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
Precedence: bulk
MIME-Version: 1.0
References: <20240109144327.GA10780@wunner.de> <CAMRc=MdXO6c6asvRSn_Z8-oFS48hroT+dazGKB6WWY1_Zu7f1Q@mail.gmail.com>
 <20240110132853.GA6860@wunner.de> <CAMRc=MdBSAb_kEO2r7r-vwLuRAEv7pMODOMtZoCCRAd=zsQb_w@mail.gmail.com>
 <20240110164105.GA13451@wunner.de> <CAMRc=MdQKPN8UbagmswjFx7_JvmJuBeuq8+9=z-+GBNUmdpWEA@mail.gmail.com>
 <20240111104211.GA32504@wunner.de> <CAMRc=MfT_VLo7++K4M89iYrciqWSrX_JyS1LX5kaGTNDNVQiOg@mail.gmail.com>
 <20240111150201.GA28409@wunner.de> <CAMRc=Mcngw1vw9q0DXRWLKk4o9FOY+Mzz-niueT-v2THvbS1Dw@mail.gmail.com>
 <20240112094312.GA8704@wunner.de>
In-Reply-To: <20240112094312.GA8704@wunner.de>
From: Rob Herring <robh+dt@kernel.org>
Date: Wed, 17 Jan 2024 17:38:27 -0600
Message-ID: <CAL_JsqL=HbCbu3kACEc0_BNXGnapdcGz3J+2-dfXQxjyvBqD6A@mail.gmail.com>
Subject: Re: [RFC 3/9] PCI/portdrv: create platform devices for child OF nodes
To: Lukas Wunner <lukas@wunner.de>
Cc: Bartosz Golaszewski <brgl@bgdev.pl>, Kalle Valo <kvalo@kernel.org>, 
	"David S . Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, 
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Conor Dooley <conor+dt@kernel.org>, 
	Bjorn Andersson <andersson@kernel.org>, Konrad Dybcio <konrad.dybcio@linaro.org>, 
	Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, 
	Bjorn Helgaas <bhelgaas@google.com>, Heiko Stuebner <heiko@sntech.de>, 
	Jernej Skrabec <jernej.skrabec@gmail.com>, Chris Morgan <macromorgan@hotmail.com>, 
	Linus Walleij <linus.walleij@linaro.org>, Geert Uytterhoeven <geert+renesas@glider.be>, 
	Arnd Bergmann <arnd@arndb.de>, Neil Armstrong <neil.armstrong@linaro.org>, 
	=?UTF-8?B?TsOtY29sYXMgRiAuIFIgLiBBIC4gUHJhZG8=?= <nfraprado@collabora.com>, 
	Marek Szyprowski <m.szyprowski@samsung.com>, Peng Fan <peng.fan@nxp.com>, 
	Robert Richter <rrichter@amd.com>, Dan Williams <dan.j.williams@intel.com>, 
	Jonathan Cameron <Jonathan.Cameron@huawei.com>, Terry Bowman <terry.bowman@amd.com>, 
	Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>, 
	=?UTF-8?Q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>, 
	Huacai Chen <chenhuacai@kernel.org>, Alex Elder <elder@linaro.org>, 
	Srini Kandagatla <srinivas.kandagatla@linaro.org>, 
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-wireless@vger.kernel.org, 
	netdev@vger.kernel.org, devicetree@vger.kernel.org, 
	linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, 
	linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, 
	Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

On Fri, Jan 12, 2024 at 3:43=E2=80=AFAM Lukas Wunner <lukas@wunner.de> wrot=
e:
>
> 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@wunner.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