linux-kernel - [PATCH] spi: atmel,quadspi: Define lan966x QSPI

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Message-ID: <CO1PR11MB48654DEFB31E8F8AB00C180292E99@CO1PR11MB4865.namprd11.prod.outlook.com>
Date:   Fri, 8 Apr 2022 11:52:36 +0000
From:   <Kavyasree.Kotagiri@...rochip.com>
To:     <Tudor.Ambarus@...rochip.com>, <broonie@...nel.org>,
        <robh+dt@...nel.org>, <krzk+dt@...nel.org>
CC:     <Nicolas.Ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <Claudiu.Beznea@...rochip.com>, <linux-spi@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <UNGLinuxDriver@...rochip.com>,
        <Manohar.Puri@...rochip.com>
Subject: [PATCH] spi: atmel,quadspi: Define lan966x QSPI


> > LAN966x SoC supports 3 QSPI controllers. Each of them support
> > data and clock frequency upto 100Mhz DDR and QUAD protocol.
> 
> How is this IP different than microchip,sama7g5-qspi? Does this speed
> limitation come from the IP itself or from the board that you're using?
> 
> Neither of these instances support octal mode?
> 
Thanks for your comments. All the three instances support only QUAD protocol. 
You are correct. There is no difference from sama7g5-qspi. Please ignore this patch. I will send next version of dt patches where I will use "microchip,sama7g5-qspi" for all my qspi nodes.

> Cheers,
> ta
> 
> >
> > Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@...rochip.com>
> > ---
> >  Documentation/devicetree/bindings/spi/atmel,quadspi.yaml | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/Documentation/devicetree/bindings/spi/atmel,quadspi.yaml
> b/Documentation/devicetree/bindings/spi/atmel,quadspi.yaml
> > index 1d493add4053..100d6e7f2748 100644
> > --- a/Documentation/devicetree/bindings/spi/atmel,quadspi.yaml
> > +++ b/Documentation/devicetree/bindings/spi/atmel,quadspi.yaml
> > @@ -19,6 +19,7 @@ properties:
> >        - microchip,sam9x60-qspi
> >        - microchip,sama7g5-qspi
> >        - microchip,sama7g5-ospi
> > +      - microchip,lan966x-qspi
> >
> >    reg:
> >      items: