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Date:   Wed, 23 Feb 2022 16:27:33 +0100
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Subject: Re: [RFC 10/10] net: sfp: add support for fwnode
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To:     Andrew Lunn <andrew@lunn.ch>,
        =?UTF-8?B?Q2zDqW1lbnQgTMOpZ2Vy?= <clement.leger@bootlin.com>
Cc:     "Russell King (Oracle)" <linux@armlinux.org.uk>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Daniel Scally <djrscally@gmail.com>,
        Heikki Krogerus <heikki.krogerus@linux.intel.com>,
        Sakari Ailus <sakari.ailus@linux.intel.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Wolfram Sang <wsa@kernel.org>, Peter Rosin <peda@axentia.se>,
        Heiner Kallweit <hkallweit1@gmail.com>,
        "David S . Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>, linux-kernel@vger.kernel.org,
        linux-acpi@vger.kernel.org, linux-i2c@vger.kernel.org,
        netdev@vger.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>
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From:   Hans de Goede <hdegoede@redhat.com>
In-Reply-To: <YhZRgnPG5Yd8mvc/@lunn.ch>
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Hi,

On 2/23/22 16:23, Andrew Lunn wrote:
>> As Russell asked, I'm also really interested if someone has a solution
>> to reuse device-tree description (overlays ?) to describe such
>> hardware. However, the fact that CONFIG_OF isn't enabled on x86 config
>> seems a bit complicated on this side.
> 
> It does work, intel even used it for one of there tiny x86 SoCs. Maybe
> it was Newton?

IIRC those SoCs did not use standard EFI/ACPI though, but rather some
other special firmware, I think it was SFI ?  This is not so much about
the CPU architecture as it is about the firmware/bootloader <->
OS interface.

Note I'm not saying this can not be done with EFI/ACPI systems, but
I think it has never been tried.

Regards,

Hans