linux-kernel - Re: [PATCH v2] EDAC: mpc85xx: Add T2080 l2-cache support

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Date:   Thu, 2 Feb 2017 18:30:05 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Chris Packham <Chris.Packham@...iedtelesis.co.nz>
Cc:     "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "morbidrsa@...il.com" <morbidrsa@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] EDAC: mpc85xx: Add T2080 l2-cache support

On Wed, Feb 01, 2017 at 11:46:23PM +0000, Chris Packham wrote:
> >> diff --git a/drivers/edac/mpc85xx_edac.c b/drivers/edac/mpc85xx_edac.c
> >> index 8f66cbed70b7..67f7bc3fe5b3 100644
> >> --- a/drivers/edac/mpc85xx_edac.c
> >> +++ b/drivers/edac/mpc85xx_edac.c
> >> @@ -629,6 +629,7 @@ static const struct of_device_id mpc85xx_l2_err_of_match[] = {
> >>  	{ .compatible = "fsl,p1020-l2-cache-controller", },
> >>  	{ .compatible = "fsl,p1021-l2-cache-controller", },
> >>  	{ .compatible = "fsl,p2020-l2-cache-controller", },
> >> +	{ .compatible = "fsl,t2080-l2-cache-controller", },
> >
> > WARNING: DT compatible string "fsl,t2080-l2-cache-controller" appears un-documented -- check ./Documentation/devicetree/bindings/
> > #58: FILE: drivers/edac/mpc85xx_edac.c:632:
> > +       { .compatible = "fsl,t2080-l2-cache-controller", },
> >
> > What is checkpatch.pl trying to tell me here?
> >
> 
> checpkatch.pl is confused by 
> Documentation/devicetree/bindings/powerpc/fsl/l2cache.txt which says
> 
> - compatible    : Should include "fsl,chip-l2-cache-controller" and "cache"
>                    where chip is the processor (bsc9132, npc8572 etc.)
> 
> So none of the fsl cache controllers pass the checkpatch.pl test.

Hmm, so others do list those names explicitly. For example:

Documentation/devicetree/bindings/pinctrl/allwinner,sunxi-pinctrl.txt

And the patch that added that check to cp:

bff5da433525 ("checkpatch: add DT compatible string documentation checks")

is basically to enforce explicit compatible names.

So I'd like to have an ACK from a PPC maintainer here first before I
apply this.

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.