netdev - Re: [PATCH v2 1/4] dt-bindings: net: Add MTIP L2 switch description

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Message-ID: <20250330083803.75a8b53e@wsk>
Date: Sun, 30 Mar 2025 08:38:03 +0200
From: Lukasz Majewski <lukma@...x.de>
To: Andrew Lunn <andrew@...n.ch>
Cc: Andrew Lunn <andrew+netdev@...n.ch>, davem@...emloft.net, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
 <pabeni@...hat.com>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Shawn Guo
 <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix
 Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>,
 Richard Cochran <richardcochran@...il.com>, netdev@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 1/4] dt-bindings: net: Add MTIP L2 switch description

Hi Andrew,

> > +                        /* Both PHYs (i.e. 0,1) have the same,
> > single GPIO, */
> > +                        /* line to handle both, their interrupts
> > (AND'ed) */  
> 
> ORed, not ANDed.
> 

Yes, correct.

> Often, the interrupt line has a weak pullup resistor, so by default it
> is high. Either PHY can then pull it low, using an open collector,
> which is HI-Z when not driving.

Yes, correct - this is how it works.

> 
> 	Andrew

Best regards,

Lukasz Majewski

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