summaryrefslogtreecommitdiff
path: root/drivers/of/irq.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/of/irq.c')
-rw-r--r--drivers/of/irq.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 3cf7a01f557f..2956d725649f 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -18,6 +18,7 @@
* driver.
*/
+#include <linux/device.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/module.h>
@@ -576,3 +577,23 @@ err:
kfree(desc);
}
}
+
+/**
+ * of_msi_configure - Set the msi_domain field of a device
+ * @dev: device structure to associate with an MSI irq domain
+ * @np: device node for that device
+ */
+void of_msi_configure(struct device *dev, struct device_node *np)
+{
+ struct device_node *msi_np;
+ struct irq_domain *d;
+
+ msi_np = of_parse_phandle(np, "msi-parent", 0);
+ if (!msi_np)
+ return;
+
+ d = irq_find_matching_host(msi_np, DOMAIN_BUS_PLATFORM_MSI);
+ if (!d)
+ d = irq_find_host(msi_np);
+ dev_set_msi_domain(dev, d);
+}