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References: <20231001-pxa-gpio-v4-0-0f3b975e6ed5@skole.hr> <20231001-pxa-gpio-v4-4-0f3b975e6ed5@skole.hr>
In-Reply-To: <20231001-pxa-gpio-v4-4-0f3b975e6ed5@skole.hr>
From:   Andy Shevchenko <andy.shevchenko@gmail.com>
Date:   Sun, 1 Oct 2023 17:40:34 +0300
Message-ID: <CAHp75VcgajYz4XScSLTxYSKy6mbTjJ9mD7zF3j90d5+6V8NyZg@mail.gmail.com>
Subject: Re: [PATCH RFC v4 4/6] ARM: pxa: Convert reset driver to GPIO descriptors
To:     =?UTF-8?Q?Duje_Mihanovi=C4=87?= <duje.mihanovic@skole.hr>
Cc:     Daniel Mack <daniel@zonque.org>,
        Haojian Zhuang <haojian.zhuang@gmail.com>,
        Robert Jarzmik <robert.jarzmik@free.fr>,
        Russell King <linux@armlinux.org.uk>,
        Alan Stern <stern@rowland.harvard.edu>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        Bartosz Golaszewski <brgl@bgdev.pl>,
        Andy Shevchenko <andy@kernel.org>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-usb@vger.kernel.org, linux-gpio@vger.kernel.org,
        linux-input@vger.kernel.org, linux-spi@vger.kernel.org
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On Sun, Oct 1, 2023 at 5:13=E2=80=AFPM Duje Mihanovi=C4=87 <duje.mihanovic@=
skole.hr> wrote:
>
> The PXA reset driver still uses the legacy GPIO interface for
> configuring and asserting the reset pin.
>
> Convert it to use the GPIO descriptor interface.

> Acked-by: Linus Walleij <linus.walleij@linaro.org>

I dunno how.

...

> +       reset_gpio =3D gpiod_get(NULL, "reset generator", GPIOD_ASIS);
> +       if (IS_ERR(reset_gpio)) {
> +               pr_err("Can't request reset_gpio: %pe\n", reset_gpio);
> +               return PTR_ERR(reset_gpio);
>         }

Here you asked for the GPIO named as "reset generator-gpio(s)" (The
"(s)" part is for new bindings), but you must not use spaces in the
GPIO names. Moreover the string literal there is for labeling, and not
for matching.

...

> +GPIO_LOOKUP_SINGLE(spitz_reset_gpio_table, NULL, "pxa-gpio",

And here should be gpios. That's what you have to request, but because
of the global (device-less) nature of this, you have to be very
careful to avoid any clashes.

> +               SPITZ_GPIO_ON_RESET, "reset generator", GPIO_ACTIVE_HIGH)=
;

...

TBH, I don't know how it is supposed to work with your current code
and if Linus really was okay with this.

--=20
With Best Regards,
Andy Shevchenko