linux-kernel - Re: [PATCH 15/16] misc: lan966x_pci: Add dtso nodes in order to support SFPs

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Message-ID: <20250410084809.1829dc65@windsurf>
Date: Thu, 10 Apr 2025 08:48:09 +0200
From: Thomas Petazzoni <thomas.petazzoni@...tlin.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Herve Codina <herve.codina@...tlin.com>, 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 <derek.kiernan@....com>, Dragan Cvetic <dragan.cvetic@....com>,
 Arnd Bergmann <arnd@...db.de>, 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>, Andy Shevchenko
 <andriy.shevchenko@...ux.intel.com>, 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>
Subject: Re: [PATCH 15/16] misc: lan966x_pci: Add dtso nodes in order to
 support SFPs

On Wed, 9 Apr 2025 17:03:45 +0200
Andrew Lunn <andrew@...n.ch> wrote:

> So it only supports a single .dtbo. In its current form it does not
> scale to multiple .dtso files for multiple different boards built
> around the PCIe chip.
> 
> At the moment, that is not really an issue, but when the second board
> comes along, some refactoring will be needed.

Indeed, but that's really an implementation detail. It doesn't change
anything to the overall approach. The only thing that would have to
change is how the driver gets the .dtbo. We could bundle several .dtbos
in the driver, we could fall back to request_firmware(), etc.

Best regards,

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com