linux-kernel - Re: [PATCH] ARM: dts: lan966x: Fix the access to the PHYs for pcb8290

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Message-ID: <5ca786cf-e919-4e7c-9134-23083cc93da5@lunn.ch>
Date: Wed, 19 Nov 2025 20:38:26 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Horatiu Vultur <horatiu.vultur@...rochip.com>
Cc: nicolas.ferre@...rochip.com, alexandre.belloni@...tlin.com,
	claudiu.beznea@...on.dev, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: lan966x: Fix the access to the PHYs for pcb8290

On Wed, Nov 19, 2025 at 02:47:50PM +0100, Horatiu Vultur wrote:
> The problem is that the MDIO controller can't detect any of the PHYs.
> The reason is that the lan966x is not pulling high the GPIO 53 that is
> connected to the PHYs reset GPIO. Without doing this the PHYs are kept
> in reset. The mdio controller framework has the possiblity to control a
> GPIO to release the reset of the PHYs. So take advantage of this and set
> line to be high before accessing the PHYs.
> 
> Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>

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

    Andrew