linux-kernel - Re: [PATCH v2 2/2] Support NVIDIA BlueField-3 pinctrl driver

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Date:   Thu, 9 Feb 2023 12:00:06 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Asmaa Mnebhi <asmaa@...dia.com>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        andy.shevchenko@...il.com, bgolaszewski@...libre.com,
        linux-acpi@...r.kernel.org, Niyas Sait <niyas.sait@...aro.org>
Subject: Re: [PATCH v2 2/2] Support NVIDIA BlueField-3 pinctrl driver

Hi Asmaa,

thanks for your patch!

(Adding my colleague Niyas so he can have a look at this quite typical ACPI
embedded pinctrl driver.)

On Wed, Feb 8, 2023 at 7:57 PM Asmaa Mnebhi <asmaa@...dia.com> wrote:

> This patch adds support to the BlueField-3 SoC pin controller.
> It allows muxing individual GPIOs to switch from the default
> hardware mode to software controlled mode.
>
> Signed-off-by: Asmaa Mnebhi <asmaa@...dia.com>

(...)
> +config PINCTRL_MLXBF
> +       tristate "NVIDIA BlueField-3 SoC Pinctrl driver"
> +       depends on (MELLANOX_PLATFORM && ARM64 && ACPI)
> +       select PINMUX
> +       select GPIOLIB
> +       select GPIOLIB_IRQCHIP

Since you're selecting these you could as well
select GPIO_MLXBF3
too.

> +#include <linux/acpi.h>

Oh ACPI, I hope Andy has time to look at this.

> +#include <linux/err.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/property.h>
> +#include <linux/regmap.h>
> +#include <linux/slab.h>
> +#include <linux/gpio.h>

Drop this include, this is a legacy API, also this is not a GPIO driver.

Go through the list and see if there are some more unnecessary headers.

> +#include <linux/pinctrl/machine.h>

Why?

> +#include <linux/pinctrl/pinctrl.h>
> +#include <linux/pinctrl/pinmux.h>
> +#include <linux/pinctrl/pinconf.h>
> +#include <linux/pinctrl/pinconf-generic.h>
> +
> +#include "core.h"

Do you need this? (I'm uncertain myself, so try without.)

Yours,
Linus Walleij