linux-kernel - Re: [RFC PATCH 0/3] Add new reg_update

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Date:   Thu, 9 Apr 2020 17:56:25 +0800
From:   Baolin Wang <baolin.wang7@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Lee Jones <lee.jones@...aro.org>, Mark Brown <broonie@...nel.org>,
        Orson Zhai <orsonzhai@...il.com>,
        Lyra Zhang <zhang.lyra@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH 0/3] Add new reg_update_bits() support

On Thu, Apr 9, 2020 at 5:52 PM Arnd Bergmann <arnd@...db.de> wrote:
>
> On Thu, Apr 9, 2020 at 11:40 AM Baolin Wang <baolin.wang7@...il.com> wrote:
>
> > > It would be nice in theory to move the sigmatel devices over to
> > > reg_update_bits() in theory, but this seems unlikely to actually happen,
> > > given that these are mostly obsolete drivers at this point.
> >
> > I checked all sigmatel devices (about 10 drivers), I think there will
> > be more work to change them to use syscon/regmap when changing to
> > reg_update_bits(). I am afraid I can not thelp to convert them without
> > a hardware, and as you said, some drivers are already dead. So I think
> > it would be nice if the driver owners can help to convert these
> > drivers, if we get a consensus about the reg_update_bits()
> > implementation at last.
>
> Thanks for taking a closer look. I didn't want to imply that you should
> fix them, just saying that it might have been nice if they had been
> done like this in the first place. Of course, when the drivers were
> written, we did not even have the regmap-mmio helpers at all.

Make sense. Thanks.

-- 
Baolin Wang