LKML Archive on lore.kernel.org
 help / color / Atom feed
From: "Rafael J. Wysocki" <rafael@kernel.org>
To: egranata@google.com
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Enric Balletbo i Serra <enric.balletbo@collabora.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	gwendal@chromium.org, Dmitry Torokhov <dtor@chromium.org>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	Brian Norris <briannorris@chromium.org>,
	Enrico Granata <egranata@chromium.org>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Hans de Goede <hdegoede@redhat.com>
Subject: Re: [PATCH] driver: platform: Add support for GpioInt() ACPI to platform_get_irq()
Date: Thu, 7 Feb 2019 20:02:18 +0100
Message-ID: <CAJZ5v0jFqkTS__oOfPNvatHOa6OA++uRNLx1-PhiPvS1VnPVXg@mail.gmail.com> (raw)
In-Reply-To: <20190207185917.167829-1-egranata@google.com>

+Mika Westerberg
+Andy Shevchenko
+Hans de Goede

On Thu, Feb 7, 2019 at 7:59 PM <egranata@google.com> wrote:
>
> From: Enrico Granata <egranata@chromium.org>
>
> ACPI 5 added support for GpioInt resources as a way to provide
> information about interrupts mediated via a GPIO controller.
>
> Several device buses (e.g. SPI, I2C) have support for retrieving
> an IRQ specified via this type of resource, and providing it
> directly to the driver as an IRQ number.
> This is not currently done for the platform drivers, as platform_get_irq()
> does not try to parse GpioInt() resources.
>
> This commit adds that functionality.
>
> Signed-off-by: Enrico Granata <egranata@chromium.org>
> ---
>  drivers/base/platform.c | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/base/platform.c b/drivers/base/platform.c
> index 1c958eb33ef4d..c50c4f9033aef 100644
> --- a/drivers/base/platform.c
> +++ b/drivers/base/platform.c
> @@ -127,7 +127,17 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
>                 irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS);
>         }
>
> -       return r ? r->start : -ENXIO;
> +       if (r)
> +               return r->start;
> +
> +       /*
> +        * If no IRQ was found, try to parse ACPI GpioInt resources
> +        * as a last resort.
> +        */
> +       if (has_acpi_companion(&dev->dev))
> +               return acpi_dev_gpio_irq_get(ACPI_COMPANION(&dev->dev), num);
> +
> +       return -ENXIO;
>  #endif
>  }
>  EXPORT_SYMBOL_GPL(platform_get_irq);
> --
> 2.20.1.611.gfbb209baf1-goog
>

  reply index

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-07 18:59 egranata
2019-02-07 19:02 ` Rafael J. Wysocki [this message]
2019-02-07 19:39   ` Andy Shevchenko
2019-02-07 19:45     ` Andy Shevchenko
2019-02-07 19:55     ` Enrico Granata
     [not found]     ` <CAPR809vnpuh8nOjU3QMCh6YJUKmtX92+bnHSUKGiAXAp6NwCHQ@mail.gmail.com>
2019-02-07 20:18       ` Andy Shevchenko
2019-02-07 20:29         ` Dmitry Torokhov
2019-02-11 10:30           ` Mika Westerberg
2019-02-11 15:42             ` Hans de Goede
2019-02-11 19:01 ` [PATCH v2] driver: platform: Support parsing GpioInt 0 in platform_get_irq() egranata
2019-02-11 19:25   ` Dmitry Torokhov
2019-02-12  7:29   ` Hans de Goede
2019-02-12  9:08   ` Mika Westerberg
2019-02-12  9:18   ` Rafael J. Wysocki
2019-02-12 12:46   ` Andy Shevchenko
2019-02-20 18:05   ` Brian Norris
2019-02-21 18:58     ` Enrico Granata
2019-02-21 19:34     ` [PATCH v3] " egranata
2019-02-22  9:03       ` Rafael J. Wysocki
2019-02-22 17:06         ` Brian Norris
2019-02-24 19:34   ` [PATCH v2] " Rafael J. Wysocki
  -- strict thread matches above, loose matches on Subject: below --
2019-02-07 18:50 [PATCH] driver: platform: Add support for GpioInt() ACPI to platform_get_irq() egranata
2019-02-07 18:57 ` Rafael J. Wysocki

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CAJZ5v0jFqkTS__oOfPNvatHOa6OA++uRNLx1-PhiPvS1VnPVXg@mail.gmail.com \
    --to=rafael@kernel.org \
    --cc=andriy.shevchenko@linux.intel.com \
    --cc=briannorris@chromium.org \
    --cc=dtor@chromium.org \
    --cc=egranata@chromium.org \
    --cc=egranata@google.com \
    --cc=enric.balletbo@collabora.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=gwendal@chromium.org \
    --cc=hdegoede@redhat.com \
    --cc=linux-acpi@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mika.westerberg@linux.intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

LKML Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/lkml/0 lkml/git/0.git
	git clone --mirror https://lore.kernel.org/lkml/1 lkml/git/1.git
	git clone --mirror https://lore.kernel.org/lkml/2 lkml/git/2.git
	git clone --mirror https://lore.kernel.org/lkml/3 lkml/git/3.git
	git clone --mirror https://lore.kernel.org/lkml/4 lkml/git/4.git
	git clone --mirror https://lore.kernel.org/lkml/5 lkml/git/5.git
	git clone --mirror https://lore.kernel.org/lkml/6 lkml/git/6.git
	git clone --mirror https://lore.kernel.org/lkml/7 lkml/git/7.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ https://lore.kernel.org/lkml \
		linux-kernel@vger.kernel.org
	public-inbox-index lkml

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kernel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git