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

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Message-ID: <Z0Q8CekmPV4fAN6f@apocalypse>
Date: Mon, 25 Nov 2024 09:57:45 +0100
From: Andrea della Porta <andrea.porta@...e.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Andrea della Porta <andrea.porta@...e.com>,
	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

Hi Andrew,

On 20:26 Sun 24 Nov     , Andrew Lunn wrote:
> > 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/

That's great. I'll do some tests as soon as I can start my rpi5 from ACPI,
I saw there has been some experimentation about it and should be feasible
to run it succesfuly.

> 
> 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.

Nice!

Cheers,
Andrea

> 
>      Andrew