linux-kernel - Re: [PATCH 2/2] reset: Add basic single-register reset driver

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Date:   Mon, 29 May 2017 18:41:13 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Joel Stanley <joel@....id.au>
Cc:     Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Andrew Jeffery <andrew@...id.au>
Subject: Re: [PATCH 2/2] reset: Add basic single-register reset driver

On Mon, May 29, 2017 at 1:24 PM, Joel Stanley <joel@....id.au> wrote:
> On Sun, May 28, 2017 at 12:41 AM, Andy Shevchenko
> <andy.shevchenko@...il.com> wrote:
>> On Fri, May 26, 2017 at 6:32 AM, Joel Stanley <joel@....id.au> wrote:
>>> This driver is a basic single-register reset controller driver that
>>> supports clearing a single bit in a register.
>>>
>>
>> While this makes sense, I'm wondering if there can be generic
>> interface for this from which we can derive this one and GPIO-based
>> one.
>
> Do we have a GPIO based one already? I couldn't find it.

No, we haven't.

> Having a think, it would be a very similar looking driver, but with
> little shared code. The context struct would contain a gpio pointer
> instead of regmap, probe would request a GPIO instead of a regmap and
> the assert/deassert/status callbacks would be gpiod_ calls.
>
> Given this is four of the four functions in this driver, do you think would be
> better off with two small drivers?

Fair enough.
Sounds like independent drivers for now is a good approach, though
it's up to maintainer.

-- 
With Best Regards,
Andy Shevchenko