linux-kernel - Re: [PATCH v4 1/3] driver core: Provide device_match_acpi

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Message-ID: <CAJZ5v0jqXqhV1FSyuoVwbgwhte7Q4KUQMozggcxCHGPf+Mfw=A@mail.gmail.com>
Date:   Fri, 15 Oct 2021 13:42:37 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Saravana Kannan <saravanak@...gle.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Wolfram Sang <wsa@...nel.org>
Subject: Re: [PATCH v4 1/3] driver core: Provide device_match_acpi_handle() helper

On Thu, Oct 14, 2021 at 3:48 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> We have a couple of users of this helper, make it available for them.
>
> The prototype for the helper is specifically crafted in order to be
> easily used with bus_find_device() call. That's why its location is
> in the driver core rather than ACPI.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

OK, please feel free to add

Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

to all of the patches in this series.

> ---
> v4: amended changelog to clarify implementation details (Rafael)
>  drivers/base/core.c        | 6 ++++++
>  include/linux/device/bus.h | 1 +
>  2 files changed, 7 insertions(+)
>
> diff --git a/drivers/base/core.c b/drivers/base/core.c
> index b67ebe6a323c..fd034d742447 100644
> --- a/drivers/base/core.c
> +++ b/drivers/base/core.c
> @@ -4838,6 +4838,12 @@ int device_match_acpi_dev(struct device *dev, const void *adev)
>  }
>  EXPORT_SYMBOL(device_match_acpi_dev);
>
> +int device_match_acpi_handle(struct device *dev, const void *handle)
> +{
> +       return ACPI_HANDLE(dev) == handle;
> +}
> +EXPORT_SYMBOL(device_match_acpi_handle);
> +
>  int device_match_any(struct device *dev, const void *unused)
>  {
>         return 1;
> diff --git a/include/linux/device/bus.h b/include/linux/device/bus.h
> index 062777a45a74..a039ab809753 100644
> --- a/include/linux/device/bus.h
> +++ b/include/linux/device/bus.h
> @@ -143,6 +143,7 @@ int device_match_of_node(struct device *dev, const void *np);
>  int device_match_fwnode(struct device *dev, const void *fwnode);
>  int device_match_devt(struct device *dev, const void *pdevt);
>  int device_match_acpi_dev(struct device *dev, const void *adev);
> +int device_match_acpi_handle(struct device *dev, const void *handle);
>  int device_match_any(struct device *dev, const void *unused);
>
>  /* iterator helpers for buses */
> --
> 2.33.0
>