linux-kernel - Re: [PATCH] gpio: tegra186: Add ACPI support

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Date:   Thu, 17 Jun 2021 18:21:38 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Akhil R <akhilrajeev@...dia.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        linux-tegra@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mikko Perttunen <mperttunen@...dia.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Suresh Mangipudi <smangipudi@...dia.com>,
        Krishna Yarlagadda <kyarlagadda@...dia.com>
Subject: Re: [PATCH] gpio: tegra186: Add ACPI support

On Thu, Jun 17, 2021 at 1:18 PM Akhil R <akhilrajeev@...dia.com> wrote:
>
> From: Akhil Rajeev <akhilrajeev@...dia.com>
>
> Add ACPI module ID to probe the driver from the ACPI based bootloader
> firmware.

...

> +#include <linux/acpi.h>

It probably should be property.h, see below.

...

> +       if (has_acpi_companion(&pdev->dev)) {
> +               gpio->secure = devm_platform_ioremap_resource(pdev, 0);
> +               gpio->base = devm_platform_ioremap_resource(pdev, 1);
> +       } else {
> +               gpio->secure = devm_platform_ioremap_resource_byname(pdev, "security");
> +               gpio->base = devm_platform_ioremap_resource_byname(pdev, "gpio");
> +       }

General comment here.
Can't we rather try named resources first and fallback to indexed
ones? (Or other way around)

In this case you don't need to check for ACPI at all.

...

> +               .acpi_match_table = ACPI_PTR(tegra186_gpio_acpi_match),

You can drop ACPI_PTR() along with ugly ifdeffery.

-- 
With Best Regards,
Andy Shevchenko