[PATCH v8 0/3] ACPI: Add irq_type to gpio interrupt

[Christophe Ricard <christophe.ricard@xxxxxxxxx>]

Hi,

ACPI probing method does not retrieve irq_type from a gpio interrupt declared
with GpioInt as it is done with devicetree probing. In other terms, irq_get_trigger_type
will always send back 0.

Those 3 patches propose a way to retrieve the correct interrupt polarity/type from a GpioInt
acpi declaration when using irq_get_trigger_type.

Since v4 after Mika and Andy's feedbacks:
- acpi_gpio_info active_low field got renamed polarity. Note that polarity/active_low is having sense
also when a gpio is not mapped as an interrupt but as an output (For example: check gpiod_set_value
in drivers/gpio/gpiolib.c).
- acpi_gsi_get_irq_type is now renamed acpi_dev_get_irq_type and moved to drivers/acpi/resource.c
- The irq described in the acpi spi slave node is now set once we fall back to retrieve normal interrupt.

Since v5 after Andy's feedbacks:
- Make sure we are not using u* type but pure C type for non hardware value.

Since v6:
- Patches now applies on top of Raphael tree tag linux-next

Since v7:
- Added "Acked-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>" to patch 1.
- Added "Acked-by: Mark Brown <broonie@xxxxxxxxxx>" to patch 3.
- Patch 3 got reworked following Mika's feedback.
- Patch 2 added few comment in acpi_find_gpio following Mika's feedback.

Best Regards
Christophe 

Christophe Ricard (3):
  acpi: Rename acpi_gsi_get_irq_type to acpi_dev_get_irq_type and export
    symbol
  ACPI / gpio: Add irq_type when a gpio is used as an interrupt
  ACPI / spi: attach gpio irq from acpi description to spi device

 drivers/acpi/gsi.c          | 21 +--------------------
 drivers/acpi/resource.c     | 26 ++++++++++++++++++++++++++
 drivers/gpio/gpiolib-acpi.c | 33 +++++++++++++++++++++++++++------
 drivers/gpio/gpiolib.c      |  4 ++--
 drivers/gpio/gpiolib.h      |  3 ++-
 drivers/spi/spi.c           |  3 +++
 include/linux/acpi.h        |  1 +
 7 files changed, 62 insertions(+), 29 deletions(-)

-- 
2.1.4

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