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authorAgustin Vega-Frias <agustinv@codeaurora.org>2017-02-03 02:23:58 +0300
committerMarc Zyngier <marc.zyngier@arm.com>2017-02-03 18:03:48 +0300
commitd44fa3d46079dc095c1346fa6e5bc96dca1ead41 (patch)
tree6c2880d745b366a4a024e3048e6727873a43b773 /drivers/base
parentfa20b176f609c813d2c677f54c814cbb7ea5f1d1 (diff)
downloadlinux-d44fa3d46079dc095c1346fa6e5bc96dca1ead41.tar.xz
ACPI: Add support for ResourceSource/IRQ domain mapping
ACPI extended IRQ resources may contain a ResourceSource to specify an alternate interrupt controller. Introduce acpi_irq_get and use it to implement ResourceSource/IRQ domain mapping. The new API is similar to of_irq_get and allows re-initialization of a platform resource from the ACPI extended IRQ resource, and provides proper behavior for probe deferral when the domain is not yet present when called. Acked-by: Rafael J. Wysocki <rafael@kernel.org> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Reviewed-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Agustin Vega-Frias <agustinv@codeaurora.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/platform.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index c4af00385502..647e4761dbf3 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -102,6 +102,16 @@ int platform_get_irq(struct platform_device *dev, unsigned int num)
}
r = platform_get_resource(dev, IORESOURCE_IRQ, num);
+ if (has_acpi_companion(&dev->dev)) {
+ if (r && r->flags & IORESOURCE_DISABLED) {
+ int ret;
+
+ ret = acpi_irq_get(ACPI_HANDLE(&dev->dev), num, r);
+ if (ret)
+ return ret;
+ }
+ }
+
/*
* The resources may pass trigger flags to the irqs that need
* to be set up. It so happens that the trigger flags for