linux-kernel - RE: [PATCH v2 8/8] arm64: dts: ls1028a-qds: add overlays for various serdes protocols

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Message-ID: <AS8PR04MB8946F30662DF917775B64DA98F759@AS8PR04MB8946.eurprd04.prod.outlook.com>
Date:   Tue, 14 Dec 2021 08:14:44 +0000
From:   Leo Li <leoyang.li@....com>
To:     Shawn Guo <shawnguo@...nel.org>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Alexandru Marginean <alexandru.marginean@....com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Aisheng Dong <aisheng.dong@....com>,
        Jason Liu <jason.hui.liu@....com>,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: RE: [PATCH v2 8/8] arm64: dts: ls1028a-qds: add overlays for various
 serdes protocols



> -----Original Message-----
> From: Shawn Guo <shawnguo@...nel.org>
> Sent: Tuesday, December 14, 2021 3:22 PM
> To: Leo Li <leoyang.li@....com>
> Cc: linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org;
> Alexandru Marginean <alexandru.marginean@....com>; Ioana Ciornei
> <ioana.ciornei@....com>; Aisheng Dong <aisheng.dong@....com>; Jason
> Liu <jason.hui.liu@....com>; Vladimir Oltean <vladimir.oltean@....com>
> Subject: Re: [PATCH v2 8/8] arm64: dts: ls1028a-qds: add overlays for various
> serdes protocols
> 
> On Fri, Dec 03, 2021 at 06:17:18PM -0600, Li Yang wrote:
> > From: Alex Marginean <alexandru.marginean@....com>
> >

[snip]

> > diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds-9999.dts
> > b/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds-9999.dts
> > new file mode 100644
> > index 000000000000..1ef743c48e84
> > --- /dev/null
> > +++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a-qds-9999.dts
> > @@ -0,0 +1,79 @@
> > +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> > +/*
> > + * Device Tree fragment for LS1028A QDS board, serdes 85xx
> > + *
> > + * Copyright 2019-2021 NXP
> > + *
> > + * Requires a LS1028A QDS board without lane B rework.
> > + * Requires a SCH-24801 card in slot 1.
> > + */
> > +
> > +/dts-v1/;
> > +/plugin/;
> > +
> > +/ {
> > +	fragment@0 {
> 
> Is fragment0 more appropriate maybe, as @unit-address requires a
> corresponding 'reg' property?

Not sure if the overlay framework will use the index information somehow, but this is how it is demonstrated in the Documentation/devicetree/overlay-notes.rst document.

Regards,
Leo