linux-kernel - Re: [PATCH v2 23/26] misc: lan966x_pci: Introduce board specific data

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Message-ID: <8b97e095-dbed-438c-9c6d-d3c2c5929fc0@lunn.ch>
Date: Thu, 8 May 2025 00:24:03 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Herve Codina <herve.codina@...tlin.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 <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,
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	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 v2 23/26] misc: lan966x_pci: Introduce board specific data

On Wed, May 07, 2025 at 09:13:05AM +0200, Herve Codina wrote:
> Only one device-tree overlay (lan966x_evb_lan9662_nic.dtbo) is handled
> and this overlay is directly referenced in lan966x_pci_load_overlay().
> 
> This avoid to use the code for an other board.
> 
> In order to be more generic and to allow support for other boards (PCI
> Vendor/Device IDs), introduce the lan966x_pci_info structure and attach
> it to PCI Vendor/Device IDs handled by the driver.
> 
> This structure contains information related to the PCI board such as
> information related to the dtbo describing the board we have to load.
> 
> Signed-off-by: Herve Codina <herve.codina@...tlin.com>

How big is the dtbo ?

This is going in the right direction. I'm just wondering if each dtbo
should be wrapped in its own very slim PCI driver, which simply
registers its lan966x_pci_info structure to a core driver. Only the
needed dtbo will then be loaded into memory as a module, not them all.

Pretty much all the pieces are here, so it can be done later.

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew