linux-kernel - Re: [PATCH 1/3] gpio: zynq: use module_platform

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Date:   Fri, 16 Apr 2021 20:27:52 +0200
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Srinivas Neeli <sneeli@...inx.com>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        Michal Simek <michals@...inx.com>,
        Shubhrajyoti Datta <shubhraj@...inx.com>,
        Srinivas Goud <sgoud@...inx.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        git <git@...inx.com>
Subject: Re: [PATCH 1/3] gpio: zynq: use module_platform_driver to simplify
 the code

On Wed, Apr 14, 2021 at 4:45 PM Srinivas Neeli <sneeli@...inx.com> wrote:
>
> HI baratosz and Andy,
>

It's Bartosz. You literally just need to copy & paste the name from my email...

> > -----Original Message-----
> > From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> > Sent: Tuesday, April 13, 2021 4:14 PM
> > To: Andy Shevchenko <andy.shevchenko@...il.com>
> > Cc: Srinivas Neeli <sneeli@...inx.com>; linus.walleij@...aro.org; Michal Simek
> > <michals@...inx.com>; Shubhrajyoti Datta <shubhraj@...inx.com>; Srinivas
> > Goud <sgoud@...inx.com>; linux-gpio@...r.kernel.org; linux-arm-
> > kernel@...ts.infradead.org; linux-kernel@...r.kernel.org; git
> > <git@...inx.com>
> > Subject: Re: [PATCH 1/3] gpio: zynq: use module_platform_driver to simplify
> > the code
> >
> > On Sat, Apr 10, 2021 at 12:08 AM Andy Shevchenko
> > <andy.shevchenko@...il.com> wrote:
> > >
> > >
> > >
> > > On Friday, April 9, 2021, Srinivas Neeli <srinivas.neeli@...inx.com> wrote:
> > >>
> > >> module_platform_driver() makes the code simpler by eliminating
> > >> boilerplate code.
> > >>
> > >> Signed-off-by: Srinivas Neeli <srinivas.neeli@...inx.com>
> > >> ---
> > >>  drivers/gpio/gpio-zynq.c | 17 +----------------
> > >>  1 file changed, 1 insertion(+), 16 deletions(-)
> > >>
> > >> diff --git a/drivers/gpio/gpio-zynq.c b/drivers/gpio/gpio-zynq.c
> > >> index 3521c1dc3ac0..bb1ac0c5cf26 100644
> > >> --- a/drivers/gpio/gpio-zynq.c
> > >> +++ b/drivers/gpio/gpio-zynq.c
> > >> @@ -1020,22 +1020,7 @@ static struct platform_driver zynq_gpio_driver
> > = {
> > >>         .remove = zynq_gpio_remove,
> > >>  };
> > >>
> > >> -/**
> > >> - * zynq_gpio_init - Initial driver registration call
> > >> - *
> > >> - * Return: value from platform_driver_register
> > >> - */
> > >> -static int __init zynq_gpio_init(void) -{
> > >> -       return platform_driver_register(&zynq_gpio_driver);
> > >> -}
> > >> -postcore_initcall(zynq_gpio_init);
> > >
> > >
> > >
> > > It’s not an equivalent. Have you tested on actual hardware? If no, there is
> > no go for this change.
> > >
> >
> > Yep, this has been like this since the initial introduction of this driver.
> > Unfortunately there's no documented reason so unless we can test it, it has
> > to stay this way.
> >
> I tested driver, functionality wise everything working fine.
> Based on below conversation, I moved driver to module driver.
> https://lore.kernel.org/patchwork/patch/818202/
>

Andy: How about we give it a try then? If anyone yells, we'll just revert it.

> Thanks
> Srinivas Neeli
>
> > Bartosz

Bartosz