+Mika Westerberg +Andy Shevchenko +Hans de Goede On Thu, Feb 7, 2019 at 7:59 PM <egranata@xxxxxxxxxx> wrote: > > From: Enrico Granata <egranata@xxxxxxxxxxxx> > > 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@xxxxxxxxxxxx> > --- > 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 >
