linux-kernel - Re: [PATCH v1 1/7] gpio-amdpt: ACPI: Use the ACPI

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Date:   Wed, 13 Oct 2021 16:44:13 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Linux ACPI <linux-acpi@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>
Subject: Re: [PATCH v1 1/7] gpio-amdpt: ACPI: Use the ACPI_COMPANION() macro directly

On Tue, Oct 12, 2021 at 7:51 PM Rafael J. Wysocki <rjw@...ysocki.net> wrote:
>
> From: Rafael J. Wysocki <rafael@...nel.org>
>
> The ACPI_HANDLE() macro is a wrapper arond the ACPI_COMPANION()
> macro and the ACPI handle produced by the former comes from the
> ACPI device object produced by the latter, so it is way more
> straightforward to evaluate the latter directly instead of passing
> the handle produced by the former to acpi_bus_get_device().
>
> Modify pt_gpio_probe() accordingly (no intentional functional impact).
>
> Signed-off-by: Rafael J. Wysocki <rafael@...nel.org>
> ---
>  drivers/gpio/gpio-amdpt.c |    4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> Index: linux-pm/drivers/gpio/gpio-amdpt.c
> ===================================================================
> --- linux-pm.orig/drivers/gpio/gpio-amdpt.c
> +++ linux-pm/drivers/gpio/gpio-amdpt.c
> @@ -72,12 +72,10 @@ static void pt_gpio_free(struct gpio_chi
>  static int pt_gpio_probe(struct platform_device *pdev)
>  {
>         struct device *dev = &pdev->dev;
> -       struct acpi_device *acpi_dev;
> -       acpi_handle handle = ACPI_HANDLE(dev);
>         struct pt_gpio_chip *pt_gpio;
>         int ret = 0;
>
> -       if (acpi_bus_get_device(handle, &acpi_dev)) {
> +       if (!ACPI_COMPANION(dev)) {
>                 dev_err(dev, "PT GPIO device node not found\n");
>                 return -ENODEV;
>         }
>
>
>

Acked-by: Bartosz Golaszewski <brgl@...ev.pl>