netdev - Re: [RFC 3/9] PCI/portdrv: create platform devices for child OF nodes

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Date: Fri, 12 Jan 2024 10:43:04 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Lukas Wunner <lukas@...ner.de>, 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>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
	Bjorn Helgaas <bhelgaas@...gle.com>, Heiko Stuebner <heiko@...ech.de>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, Chris Morgan <macromorgan@...mail.com>, 
	Linus Walleij <linus.walleij@...aro.org>, Geert Uytterhoeven <geert+renesas@...der.be>, 
	Arnd Bergmann <arnd@...db.de>, Neil Armstrong <neil.armstrong@...aro.org>, 
	Nícolas F . R . A . Prado <nfraprado@...labora.com>, 
	Marek Szyprowski <m.szyprowski@...sung.com>, Peng Fan <peng.fan@....com>, 
	Robert Richter <rrichter@....com>, Dan Williams <dan.j.williams@...el.com>, 
	Jonathan Cameron <Jonathan.Cameron@...wei.com>, Terry Bowman <terry.bowman@....com>, 
	Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>, 
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
	Huacai Chen <chenhuacai@...nel.org>, Alex Elder <elder@...aro.org>, 
	Srini Kandagatla <srinivas.kandagatla@...aro.org>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-wireless@...r.kernel.org, 
	netdev@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
	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 Thu, Jan 11, 2024 at 10:44 PM Geert Uytterhoeven
<geert@...ux-m68k.org> wrote:
>
> Hi Bartosz,
>
> On Thu, Jan 11, 2024 at 5:16 PM Bartosz Golaszewski <brgl@...ev.pl> wrote:
> > 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 (!).
>
> Huh? Config PCI_DYNAMIC_OF_NODES does select OF_DYNAMIC.
>

Indeed, I got something wrong.

But in any case: we *don't* need dynamic OF nodes as we don't create
new ones. We use the ones that already exist. This is logically a
wrong place to add this.

Lukas, Terry: am I getting this right - is the port driver supposed to
go away at some point? Because I'm not sure I understand what the
problem is here. To me it seems that when we create a real device for
the PCIe port, then it's only normal to populate its child devices
from the port driver.

Bartosz

> Gr{oetje,eeting}s,
>
>                         Geert
>
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds
>