diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2014-12-10 17:30:59 +0000 |
|---|---|---|
| committer | Jon Medhurst <tixy@linaro.org> | 2015-06-15 09:28:06 +0100 |
| commit | 1a5a81fe957b969a25e263b16f18ef7a100af566 (patch) | |
| tree | b2e33bb579905dc8ca603d546286d958ed5f6cc5 | |
| parent | a59cf343c0dda4965c089a51730c43ef7bb34fb3 (diff) | |
PCI/MSI: of: Allow msi_domain lookup using the PHB node
A number of platforms do not need to use the msi-parent property,
as the host bridge itself provides the MSI controller.
Allow this configuration by performing an irq domain lookup based
on the PHB node if it doesn't have a valid msi-parent property.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Jon Medhurst <tixy@linaro.org>
| -rw-r--r-- | drivers/pci/of.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/pci/of.c b/drivers/pci/of.c index d8d12742e11..75bfb854337 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -68,9 +68,14 @@ void pci_set_phb_of_msi_domain(struct pci_bus *bus) 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) - return; + np = bus->dev.of_node; dev_set_msi_domain(&bus->dev, irq_find_host(np)); #endif } |