linux-kernel - Re: [PATCH v4 00/10] Add support for RaspberryPi RP1 PCI device using a DT overlay

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Message-ID: <22e08939-fa89-4781-824e-1ea01648fb1b@lunn.ch>
Date: Sun, 24 Nov 2024 20:26:01 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Andrea della Porta <andrea.porta@...e.com>
Cc: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczynski <kw@...ux.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>, Bartosz Golaszewski <brgl@...ev.pl>,
	Derek Kiernan <derek.kiernan@....com>,
	Dragan Cvetic <dragan.cvetic@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Saravana Kannan <saravanak@...gle.com>, linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-gpio@...r.kernel.org,
	Masahiro Yamada <masahiroy@...nel.org>,
	Stefan Wahren <wahrenst@....net>,
	Herve Codina <herve.codina@...tlin.com>,
	Luca Ceresoli <luca.ceresoli@...tlin.com>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v4 00/10] Add support for RaspberryPi RP1 PCI device
 using a DT overlay

> This patchset is also a first attempt to be more agnostic wrt hardware
> description standards such as OF devicetree and ACPI, where 'agnostic'
> means "using DT in coexistence with ACPI", as been already promoted
> by e.g. AL (see [4]). Although there's currently no evidence it will also
> run out of the box on purely ACPI system, it is a first step towards
> that direction.

When combined with CONFIG_PCI_DYNAMIC_OF_NODES and this patch series:

https://patchwork.kernel.org/project/linux-pci/cover/20241114165446.611458-1-herve.codina@bootlin.com/

It probably does work, or is very near to working. Bootlin appear to
have the LAN966x working on an ACPI system, and what you are adding is
not very different.

I'm also currently playing around in this area, trying to instantiate
some complex networking hardware using DT overlays on an ACPI system.

     Andrew