linux-kernel - Re: [PATCH net-next v4 11/12] microchip: lan865x: add driver support for Microchip's LAN865X MAC-PHY

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Date: Mon, 29 Apr 2024 14:09:16 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Parthiban.Veerasooran@...rochip.com
Cc: conor@...nel.org, ramon.nordin.rodriguez@...roamp.se,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, horms@...nel.org, saeedm@...dia.com,
	anthony.l.nguyen@...el.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, corbet@....net,
	linux-doc@...r.kernel.org, robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	devicetree@...r.kernel.org, Horatiu.Vultur@...rochip.com,
	ruanjinjie@...wei.com, Steen.Hegelund@...rochip.com,
	vladimir.oltean@....com, UNGLinuxDriver@...rochip.com,
	Thorsten.Kummermehr@...rochip.com, Pier.Beruto@...emi.com,
	Selvamani.Rajagopal@...emi.com, Nicolas.Ferre@...rochip.com,
	benjamin.bigler@...nformulastudent.ch
Subject: Re: [PATCH net-next v4 11/12] microchip: lan865x: add driver support
 for Microchip's LAN865X MAC-PHY

> Looks like, the below changes needed to work correctly,
> 
> lan865x.c:
> - compatible string to be changed like below as it is a fallback for all 
> variants,
> 	.compatible = "microchip,lan8650"
> - DRV_NAME to be changed like below,
> 	#define DRV_NAME                        "lan8650"
> 
> microchip,lan865x.example.dts for lan8650:
> - compatible string to be changed like below,
> 	.compatible = "microchip,lan8650";
> 	OR
> microchip,lan865x.example.dts for lan8651:
> - compatible string to be changed like below,
> 	compatible = "microchip,lan8651", "microchip,lan8650";
> 
> I tested with the above changes and there was no issues observed. Any 
> comments on this? Otherwise we can stick with these changes for the next 
> version.

As Conor said, this is probably relying on the fallback
mechanism. Please look at other SPI devices, e.g. hwmon, and see how
they probe for multiple different devices.

	Andrew