netdev - Re: [PATCH] [v2] at86rf230: convert to gpio descriptors

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Message-ID: <CAKdAkRSuDJgdsSQqy9Cc_eUYuOfFsLmBJ8Rd93uQhY6HV8nN4w@mail.gmail.com>
Date:   Tue, 31 Jan 2023 16:50:07 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Alexander Aring <alex.aring@...il.com>,
        Stefan Schmidt <stefan@...enfreihafen.org>,
        Arnd Bergmann <arnd@...db.de>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org,
        linux-wpan@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] [v2] at86rf230: convert to gpio descriptors

On Tue, Jan 31, 2023 at 3:52 PM Dmitry Torokhov
<dmitry.torokhov@...il.com> wrote:
>
> Hi Arnd,
>
> On Thu, Jan 26, 2023 at 8:32 AM Arnd Bergmann <arnd@...nel.org> wrote:
> >
> >         /* Reset */
> > -       if (gpio_is_valid(rstn)) {
> > +       if (rstn) {
> >                 udelay(1);
> > -               gpio_set_value_cansleep(rstn, 0);
> > +               gpiod_set_value_cansleep(rstn, 0);
> >                 udelay(1);
> > -               gpio_set_value_cansleep(rstn, 1);
> > +               gpiod_set_value_cansleep(rstn, 1);
>
> For gpiod conversions, if we are not willing to chase whether existing
> DTSes specify polarities
> properly and create workarounds in case they are wrong, we should use
> gpiod_set_raw_value*()
> (my preference would be to do the work and not use "raw" variants).
>
> In this particular case, arch/arm/boot/dts/vf610-zii-dev-rev-c.dts
> defines reset line as active low,
> so you are leaving the device in reset state.
>
> Please review your other conversion patches.

We also can not change the names of requested GPIOs from "reset-gpio"
to "rstn-gpios" and expect
this to work.

Stefan, please consider reverting this and applying a couple of
patches I will send out shortly.

Thanks.

-- 
Dmitry