linux-kernel - Re: [PATCH 11/16] of: property: Allow fw

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Message-Id: <68b23799-29c2-4309-b55a-87d83dc6fbe9@app.fastmail.com>
Date: Tue, 22 Apr 2025 14:00:12 +0200
From: "Arnd Bergmann" <arnd@...db.de>
To: "Herve Codina" <herve.codina@...tlin.com>,
 "Andy Shevchenko" <andriy.shevchenko@...ux.intel.com>
Cc: "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
 "Rafael J . Wysocki" <rafael@...nel.org>,
 "Danilo Krummrich" <dakr@...nel.org>, "Shawn Guo" <shawnguo@...nel.org>,
 "Sascha Hauer" <s.hauer@...gutronix.de>,
 "Pengutronix Kernel Team" <kernel@...gutronix.de>,
 "Fabio Estevam" <festevam@...il.com>,
 "Michael Turquette" <mturquette@...libre.com>,
 "Stephen Boyd" <sboyd@...nel.org>, "Andi Shyti" <andi.shyti@...nel.org>,
 "Wolfram Sang" <wsa+renesas@...g-engineering.com>,
 "Peter Rosin" <peda@...ntia.se>,
 "derek.kiernan@....com" <derek.kiernan@....com>,
 "dragan.cvetic@....com" <dragan.cvetic@....com>,
 "Rob Herring" <robh@...nel.org>,
 "Saravana Kannan" <saravanak@...gle.com>,
 "Bjorn Helgaas" <bhelgaas@...gle.com>, "Mark Brown" <broonie@...nel.org>,
 "Len Brown" <lenb@...nel.org>, "Daniel Scally" <djrscally@...il.com>,
 "Heikki Krogerus" <heikki.krogerus@...ux.intel.com>,
 "Sakari Ailus" <sakari.ailus@...ux.intel.com>,
 "Wolfram Sang" <wsa@...nel.org>,
 "Geert Uytterhoeven" <geert+renesas@...der.be>,
 linux-kernel@...r.kernel.org, imx@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
 linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
 linux-pci@...r.kernel.org, linux-spi@...r.kernel.org,
 linux-acpi@...r.kernel.org,
 "Allan Nielsen" <allan.nielsen@...rochip.com>,
 "Horatiu Vultur" <horatiu.vultur@...rochip.com>,
 "Steen Hegelund" <steen.hegelund@...rochip.com>,
 "Luca Ceresoli" <luca.ceresoli@...tlin.com>,
 "Thomas Petazzoni" <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH 11/16] of: property: Allow fw_devlink device-tree support for x86

On Tue, Apr 8, 2025, at 15:49, Herve Codina wrote:
> On Mon, 7 Apr 2025 18:36:28 +0300
>> On Mon, Apr 07, 2025 at 04:55:40PM +0200, Herve Codina wrote:
>> 
>> This is incorrect, they never had ACPI to begin with. Also there is third
>> platform that are using DT on x86 core — SpreadTrum based phones.
>
> I will rework the commit log to avoid 'mixing ACPI and device-tree'
>
> For "SpreadTrum based phones", do you have an idea about the Kconfig symbol
> I could use to filter our this x86 systems?
>
> Anything I find upstream related to SpreadTrum seems base on ARM cpus.
> I probably miss something.

This is the Intel SOFIA platform with chips from both Spreadtrum (now
Unisoc) and Rockchips, using a port of the arch/arm/ code DT on x86,
about 10 years ago.

That code was never upstreamed, and is long abandoned by everyone.

>> And not sure about AMD stuff (Geode?).
>
> Same here, if some AMD devices need to be filtered out, is there a specific
> Kconfig symbol I can use ?

The only one I can think of is CONFIG_OLPC, the XO-1 was a Geode LX,
while XO-1.5 used a VIA C7, both with actual open firmware (not just
fdt).

       Arnd