Re: [PATCH v7 0/6] gpio: Add GPIO Aggregator

From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Andy Shevchenko <andriy.shevchenko@intel.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Harish Jenny K N <harish_kandiga@mentor.com>,
	Eugeniu Rosca <erosca@de.adit-jv.com>,
	Alexander Graf <graf@amazon.com>,
	Peter Maydell <peter.maydell@linaro.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Phil Reid <preid@electromag.com.au>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Christoffer Dall <christoffer.dall@arm.com>,
	Magnus Damm <magnus.damm@gmail.com>,
	"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
	"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
	Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [PATCH v7 0/6] gpio: Add GPIO Aggregator
Date: Wed, 20 May 2020 15:40:52 +0300	[thread overview]
Message-ID: <CAHp75VcARgxf-Ty77mk2PJ0BUxJsXQdDLMffiDdv1gCkF_VMtg@mail.gmail.com> (raw)
In-Reply-To: <CAHp75Vc9=1cD81TDuaGuFQpBcHaKqEZKv8tA7ZGBbDJ6MKq6kw@mail.gmail.com>

On Wed, May 20, 2020 at 3:40 PM Andy Shevchenko
<andy.shevchenko@gmail.com> wrote:
> On Wed, May 20, 2020 at 3:38 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > On Wed, May 20, 2020 at 2:14 PM Andy Shevchenko
> > <andriy.shevchenko@intel.com> wrote:
> > > On Mon, May 11, 2020 at 04:52:51PM +0200, Geert Uytterhoeven wrote:
>
> ...
>
> > > Sorry for late reply, recently noticed this nice idea.
> > > The comment I have is, please, can we reuse bitmap parse algorithm and syntax?
> > > We have too many different formats and parsers in the kernel and bitmap's one
> > > seems suitable here.
> >
> > Thank you, I wasn't aware of that.
> >
> > Which one do you mean? The documentation seems to be confusing,
> > and incomplete.
> > My first guess was bitmap_parse(), but that one assumes hex values?
> > And given it processes the unsigned long bitmap in u32 chunks, I guess
> > it doesn't work as expected on big-endian 64-bit?
> >
> > bitmap_parselist() looks more suitable, and the format seems to be

> > compatible with what's currently used, so it won't change ABI.

What ABI? We didn't have a release with it, right? So, we are quite
flexible for few more weeks to amend it.

> > Is that the one you propose?
>
> Yes, sorry for the confusion.
>
> > > (Despite other small clean ups, like strstrip() use)
> >
> > Aka strim()? There are too many of them, to know all of them by heart ;-)
>
> The difference between them is __must_check flag. But yes.

-- 
With Best Regards,
Andy Shevchenko