linux-kernel - Re: [PATCH v2 10/11] gpio: pca953x: Convert to use bitmap API

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Message-ID: <CAMuHMdVsuo5adFL=oWAeu+=yjdk6DVVLDaB2LMtuFu6g8XqnLg@mail.gmail.com>
Date:   Wed, 23 Oct 2019 10:34:16 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Yury Norov <yury.norov@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        William Breathitt Gray <vilhelm.gray@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Marek Vasut <marek.vasut+renesas@...il.com>
Subject: Re: [PATCH v2 10/11] gpio: pca953x: Convert to use bitmap API

Hi Andy,

On Wed, Oct 23, 2019 at 10:01 AM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
> On Tue, Oct 22, 2019 at 08:03:00PM +0200, Geert Uytterhoeven wrote:
> > On Tue, Oct 22, 2019 at 7:29 PM Andy Shevchenko
> > <andriy.shevchenko@...ux.intel.com> wrote:
> > > Instead of customized approach convert the driver to use bitmap API.
>
> > >  #define MAX_BANK 5
> > >  #define BANK_SZ 8
> > > +#define MAX_LINE       (MAX_BANK * BANK_SZ)
> >
> > Given (almost) everything is now bitmap (i.e. long [])-based, you might
> > as well increase MAX_BANK to a multiple of 4 or 8, e.g. 8.
>
> We can do it any time when we will really need it.

True. Especially as there's no real need to do it now.
(sorry, my mind mixed this up with gpio-74x164...)

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds