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Diffstat (limited to 'drivers/acpi/resource.c')
-rw-r--r--drivers/acpi/resource.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index cdc5c2599beb..d02fd53042a5 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -23,6 +23,7 @@
#include <linux/export.h>
#include <linux/ioport.h>
#include <linux/slab.h>
+#include <linux/irq.h>
#ifdef CONFIG_X86
#define valid_IRQ(i) (((i) != 0) && ((i) != 2))
@@ -336,6 +337,31 @@ unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
}
EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
+/**
+ * acpi_dev_get_irq_type - Determine irq type.
+ * @triggering: Triggering type as provided by ACPI.
+ * @polarity: Interrupt polarity as provided by ACPI.
+ */
+unsigned int acpi_dev_get_irq_type(int triggering, int polarity)
+{
+ switch (polarity) {
+ case ACPI_ACTIVE_LOW:
+ return triggering == ACPI_EDGE_SENSITIVE ?
+ IRQ_TYPE_EDGE_FALLING :
+ IRQ_TYPE_LEVEL_LOW;
+ case ACPI_ACTIVE_HIGH:
+ return triggering == ACPI_EDGE_SENSITIVE ?
+ IRQ_TYPE_EDGE_RISING :
+ IRQ_TYPE_LEVEL_HIGH;
+ case ACPI_ACTIVE_BOTH:
+ if (triggering == ACPI_EDGE_SENSITIVE)
+ return IRQ_TYPE_EDGE_BOTH;
+ default:
+ return IRQ_TYPE_NONE;
+ }
+}
+EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type);
+
static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi)
{
res->start = gsi;