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Message-ID: <7444c54c0214552f1a565a8bd0c48850@walle.cc>
Date:   Fri, 11 Feb 2022 14:29:16 +0100
From:   Michael Walle <michael@...le.cc>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     Rob Herring <robh@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Lee Jones <lee.jones@...aro.org>, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Leo Li <leoyang.li@....com>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/3] dt-bindings: mfd: add "fsl,ls1028a-qds-qixis-i2c"
 compatible to sl28cpld

Am 2022-02-11 14:24, schrieb Vladimir Oltean:
> On Fri, Feb 11, 2022 at 07:01:42AM -0600, Rob Herring wrote:
>> On Thu, Jan 27, 2022 at 07:21:04PM +0200, Vladimir Oltean wrote:
>> > The LS1028A-QDS QIXIS FPGA has no problem working with the
>> > simple-mfd-i2c.c driver, so extend the list of compatible strings to
>> > include that part.
>> >
>> > Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
>> > ---
>> >  Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml | 4 +++-
>> >  1 file changed, 3 insertions(+), 1 deletion(-)
>> >
>> > diff --git a/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml b/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml
>> > index eb3b43547cb6..8c1216eb36ee 100644
>> > --- a/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml
>> > +++ b/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml
>> > @@ -16,7 +16,9 @@ description: |
>> >
>> >  properties:
>> >    compatible:
>> > -    const: kontron,sl28cpld
>> > +    enum:
>> > +      - fsl,ls1028a-qds-qixis-i2c
>> > +      - kontron,sl28cpld
>> 
>> Is there some relationship between these besides happening to use the
>> same driver? Sharing a generic driver is not a reason to have the same
>> binding doc.

Ahh didn't notice this. Yes that should probably go into an own binding.

>> Your DT has a mux-controller which is undocuemnted in this binding.
>> 
>> Rob
> 
> I'd guess they are both programmable FPGA's/CPLD's that are used for
> board control. What I don't know is whether the sources for the Kontron
> bit stream are derived in any way from the QIXIS.

I can 100% guarantee that is not the case ;)

> I can look into adding a separate binding doc for the QIXIS anyway.

-michael

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