* 2 of the License, or (at your option) any later version.
*/
+#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/of.h>
+#include <linux/of_irq.h>
#include <linux/of_pci.h>
#include "pci.h"
return of_node_get(bus->bridge->parent->of_node);
return NULL;
}
+
+struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus)
+{
+#ifdef CONFIG_IRQ_DOMAIN
+ struct irq_domain *d;
+
+ if (!bus->dev.of_node)
+ return NULL;
+
+ /* Start looking for a phandle to an MSI controller. */
+ d = of_msi_get_domain(&bus->dev, bus->dev.of_node, DOMAIN_BUS_PCI_MSI);
+ if (d)
+ return d;
+
+ /*
+ * If we don't have an msi-parent property, look for a domain
+ * directly attached to the host bridge.
+ */
+ d = irq_find_matching_host(bus->dev.of_node, DOMAIN_BUS_PCI_MSI);
+ if (d)
+ return d;
+
+ return irq_find_host(bus->dev.of_node);
+#else
+ return NULL;
+#endif
+}