diff options
Diffstat (limited to 'drivers/pci/of.c')
-rw-r--r-- | drivers/pci/of.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/pci/of.c b/drivers/pci/of.c index f0929934bb7a..75bfb854337e 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -9,6 +9,7 @@ * 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> @@ -59,3 +60,22 @@ struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus) return of_node_get(bus->bridge->parent->of_node); return NULL; } + +void pci_set_phb_of_msi_domain(struct pci_bus *bus) +{ +#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN + struct device_node *np; + + if (!bus->dev.of_node) + return; + /* Start looking for a phandle to an MSI controller. */ + np = of_parse_phandle(bus->dev.of_node, "msi-parent", 0); + /* + * If we don't have an msi-parent property, look for a domain + * directly attached to the host bridge. + */ + if (!np) + np = bus->dev.of_node; + dev_set_msi_domain(&bus->dev, irq_find_host(np)); +#endif +} |