netdev - Re: [PATCH net-next v2 05/11] dt-bindings: net: dsa: microchip,ksz: add interrupt property

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Date:   Fri, 13 Nov 2020 19:57:00 +0100
From:   Christian Eggers <ceggers@...i.de>
To:     Vladimir Oltean <olteanv@...il.com>
CC:     Jakub Kicinski <kuba@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        "Richard Cochran" <richardcochran@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        "Vivien Didelot" <vivien.didelot@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Kurt Kanzenbach <kurt.kanzenbach@...utronix.de>,
        George McCollister <george.mccollister@...il.com>,
        Marek Vasut <marex@...x.de>,
        Helmut Grohne <helmut.grohne@...enta.de>,
        Paul Barker <pbarker@...sulko.com>,
        "Codrin Ciubotariu" <codrin.ciubotariu@...rochip.com>,
        Tristram Ha <Tristram.Ha@...rochip.com>,
        Woojung Huh <woojung.huh@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next v2 05/11] dt-bindings: net: dsa: microchip,ksz: add interrupt property

On Friday, 13 November 2020, 00:07:32 CET, Vladimir Oltean wrote:
> On Thu, Nov 12, 2020 at 04:35:31PM +0100, Christian Eggers wrote:
> > The devices have an optional interrupt line.
> > 
> > Signed-off-by: Christian Eggers <ceggers@...i.de>
> > ---
> > 
> >  .../devicetree/bindings/net/dsa/microchip,ksz.yaml        | 8 ++++++++
> >  1 file changed, 8 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> > b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml index
> > 431ca5c498a8..b2613d6c97cf 100644
> > --- a/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> > +++ b/Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml
> > 
...
> > +            interrupt-parent = <&gpio5>;
> > +            interrupts = <1 IRQ_TYPE_LEVEL_LOW>;  /* INTRP_N line */
> 
> Isn't it preferable to use this syntax?
> 
> 		interrupts-extended = <&gpio5 1 IRQ_TYPE_LEVEL_LOW>;  /* INTRP_N line */

After reading Documentation/devicetree/bindings/interrupt-controller/interrupts.txt,
I would say that "interrupts-extended" is more flexible as it allows different
interrupt parents for the case there is more than one interrupt line. Although
there is only one line on the KSZ, I will change this.