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

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Date:   Thu, 9 Apr 2020 11:52:34 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Baolin Wang <baolin.wang7@...il.com>
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 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.

      Arnd