linux-kernel - Re: [PATCH] ARM: dts: mvebu: linksys: enable buffer manager support

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Message-ID: <20170316064840.3398bd26@gmail.com>
Date:   Thu, 16 Mar 2017 06:48:40 +0100
From:   Ralph Sennhauser <ralph.sennhauser@...il.com>
To:     Gregory CLEMENT <gregory.clement@...e-electrons.com>
Cc:     Jason Cooper <jason@...edaemon.net>, Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS), linux-kernel@...r.kernel.org (open list)
Subject: Re: [PATCH] ARM: dts: mvebu: linksys: enable buffer manager support

On Wed, 15 Mar 2017 20:17:35 +0100
Gregory CLEMENT <gregory.clement@...e-electrons.com> wrote:

> Hi Ralph,
>  
>  On mer., mars 08 2017, Ralph Sennhauser <ralph.sennhauser@...il.com>
> wrote:
> 
> </snip>
>
> > @@ -88,6 +89,9 @@
> >  			ethernet@...00 {
> >  				status = "okay";
> >  				phy-mode = "rgmii-id";
> > +				buffer-manager = <&bm>;
> > +				bm,pool-long = <1>;
> > +				bm,pool-short = <3>;
> >  				fixed-link {
> >  					speed = <1000>;
> >  					full-duplex;
> > @@ -97,6 +101,9 @@
> >  			ethernet@...00 {
> >  				status = "okay";
> >  				phy-mode = "sgmii";
> > +				buffer-manager = <&bm>;
> > +				bm,pool-long = <0>;
> > +				bm,pool-short = <3>;  
> Any reason to reuse the same pool than the other port?
> 
> As only two ports are used here, then each of them can have use 2 of
> the 4 availables pools. 
> 
> </snip>

Hi Gregory,

It has been quite a while since I have written that patch. Something
written somewhere in the Documentation / commit message which I can't
find anymore gave me the impression that using the same for short
doesn't make a difference. So I went with the pool IDs used for other
similar boards for "consistency".

Will send a v2 shortly using all independent pools using the IDs witch
come most natural in context.

Thanks
Ralph