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Date:   Thu, 31 Jan 2019 18:26:44 +0100
From:   Boris Brezillon <bbrezillon@kernel.org>
To:     Dinh Nguyen <dinguyen@kernel.org>
Cc:     Miquel Raynal <miquel.raynal@bootlin.com>,
        Richard Weinberger <richard@nod.at>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Marek Vasut <marek.vasut@gmail.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Boris Brezillon <boris.brezillon@bootlin.com>,
        linux-mtd <linux-mtd@lists.infradead.org>,
        Brian Norris <computersforpeace@gmail.com>,
        David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCH] mtd: rawnand: denali_dt: remove single anonymous clock
 support
Message-ID: <20190131182644.366a54a5@bbrezillon>
In-Reply-To: <da2ea926-30e9-c7b9-8b1f-ee65ccc0fb7a@kernel.org>
References: <1547539894-12898-1-git-send-email-yamada.masahiro@socionext.com>
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        <CAK7LNATnfTQXHrXJQp7732-e7hvd8ORcYubyDmz0KHaRXRMDqQ@mail.gmail.com>
        <20190128112007.440046e6@xps13>
        <da2ea926-30e9-c7b9-8b1f-ee65ccc0fb7a@kernel.org>
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Hi Dinh,

On Thu, 31 Jan 2019 11:24:16 -0600
Dinh Nguyen <dinguyen@kernel.org> wrote:

> On 1/28/19 4:20 AM, Miquel Raynal wrote:
> > Hi Dinh,
> > 
> > Masahiro Yamada <yamada.masahiro@socionext.com> wrote on Wed, 16 Jan
> > 2019 10:27:11 +0900:
> >   
> >> (+CC Dinh Nguyen)
> >>
> >> On Tue, Jan 15, 2019 at 5:22 PM Miquel Raynal <miquel.raynal@bootlin.com> wrote:  
> >>>
> >>> Hi Masahiro,
> >>>
> >>> Masahiro Yamada <yamada.masahiro@socionext.com> wrote on Tue, 15 Jan
> >>> 2019 17:11:34 +0900:
> >>>    
> >>>> Commit 6f1fe97bec34 ("mtd: rawnand: denali_dt: add more clocks based
> >>>> on IP datasheet") introduced a more correct binding that requires
> >>>> three named clocks.
> >>>>
> >>>> Now that all upstream DT files migrated over to it, remove the single
> >>>> anonymous clock support.    
> >>>
> >>> I would love to do that but I think this is against the "DT backward
> >>> compatibility rule".    
> >>
> >> Yeah, I know this rule, but we break DT binding from time to time.
> >>
> >>
> >>  
> >>> Anyway, IIRC it is accepted that this kind of
> >>> rule might be broken if decided per the arch-maintainer (in this
> >>> case, you I suppose). So if this is really what you want, I'll queue
> >>> it.    
> >>
> >> My platform is fine, but this driver is used by SOCFPGA boards as well.
> >>
> >> I CCed the SOCFPGA maintainer, Dinh Nguyen.
> >>  
> > 
> > Gentle ping on this topic.
> >   
> 
> This patch looks fine to be. Feel free to add:
> 
> Tested-by: Dinh Nguyen <dinguyen@kernel.org>

I think Miquel is waiting for an Acked-by to confirm that you're okay
breaking backward compat with old DT.

Regards,

Boris