linux-kernel - [PATCH v2 0/3] ACPI: Translate Linux IRQ number directly from GpioInt

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Date:	Wed,  6 May 2015 13:29:05 +0300
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Wolfram Sang <wsa@...-dreams.de>,
	Octavian Purdila <octavian.purdila@...el.com>,
	Robert Dolca <robert.dolca@...el.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org, linux-i2c@...r.kernel.org
Subject: [PATCH v2 0/3] ACPI: Translate Linux IRQ number directly from GpioInt

Hi,

This is second iteration of the series. The previous version can be found
from [1].

Currently drivers for ACPI enumerated devices that have their interrupt
line connected to a GPIO controller instead of IO-APIC are required to do
complete gpiod_get()/gpiod_to_irq() etc. dance themselves. This adds
unnecessary lines of code to these drivers.

It turned out that DT solved the problem already with introduction of
of_irq_get() which is able to handle GPIO based interrupts as well through
irqchip API [2].

The following three patches achieve the same for ACPI by introducing new
function acpi_dev_gpio_irq_get() that is then used in I2C core to automatically
translate ACPI GpioInt resource to Linux IRQ number.

Changes to the previous version:
 - Added Rafael's ack to the first patch
 - Introduce new patch that makes I2C ACPI slave enumeration code use 0 to mean
   no interrupt.

If no objections, I would like this to merged via either I2C or GPIO trees.

Thanks.

[1] https://lkml.org/lkml/2015/4/28/455
[2] https://lkml.org/lkml/2015/3/25/103

Mika Westerberg (3):
  gpio / ACPI: Add support for retrieving GpioInt resources from a device
  i2c / ACPI: Use 0 to indicate that device does not have interrupt assigned
  i2c / ACPI: Assign IRQ for devices that have GpioInt automatically

 drivers/gpio/gpiolib-acpi.c | 29 +++++++++++++++++++++++++++++
 drivers/i2c/i2c-core.c      | 12 ++++++++----
 include/linux/acpi.h        |  7 +++++++
 3 files changed, 44 insertions(+), 4 deletions(-)

-- 
2.1.4

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