linux-kernel - Re: [PATCH] mtd: rawnand: denali_dt: remove single anonymous clock support

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Date:   Thu, 31 Jan 2019 18:26:44 +0100
From:   Boris Brezillon <bbrezillon@...nel.org>
To:     Dinh Nguyen <dinguyen@...nel.org>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Boris Brezillon <boris.brezillon@...tlin.com>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        Brian Norris <computersforpeace@...il.com>,
        David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH] mtd: rawnand: denali_dt: remove single anonymous clock
 support

Hi Dinh,

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

> On 1/28/19 4:20 AM, Miquel Raynal wrote:
> > Hi Dinh,
> > 
> > Masahiro Yamada <yamada.masahiro@...ionext.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@...tlin.com> wrote:  
> >>>
> >>> Hi Masahiro,
> >>>
> >>> Masahiro Yamada <yamada.masahiro@...ionext.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@...nel.org>

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

Regards,

Boris