PCI/MSI: Add support for OF-provided msi_domain
In order to populate the PCI host bridge msi_domain, use the
"msi-parent" attribute to lookup a corresponding irq domain.
If found, this is our MSI domain.
This gets plugged into the core PCI code.
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: Ma Jun <majun258@huawei.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Duc Dang <dhdang@apm.com>
Cc: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1438091186-10244-6-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index c03ecbf..a7afeac 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -663,12 +663,15 @@
static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus)
{
+ struct irq_domain *d;
+
/*
* Any firmware interface that can resolve the msi_domain
* should be called from here.
*/
+ d = pci_host_bridge_of_msi_domain(bus);
- return NULL;
+ return d;
}
static void pci_set_bus_msi_domain(struct pci_bus *bus)