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authorTomasz Nowicki <tn@semihalf.com>2016-09-12 21:32:26 +0300
committerMarc Zyngier <marc.zyngier@arm.com>2016-09-12 22:32:43 +0300
commitdb744aaa279fa1d2a06dd6b95f9599acf3557885 (patch)
tree57020b5b81a3e39a0edd48ae00915416aee36c68 /drivers/irqchip
parent3f010cf197324b6c1e87f472e64b87c5f909735e (diff)
downloadlinux-db744aaa279fa1d2a06dd6b95f9599acf3557885.tar.xz
irqchip/gicv3-its: Factor out PCI-MSI part that might be reused for ACPI
Firmware agnostic code lands in common functions which do necessary domain initialization based on unique domain handler. DT specific code goes to DT specific init call. Signed-off-by: Tomasz Nowicki <tn@semihalf.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic-v3-its-pci-msi.c44
1 files changed, 29 insertions, 15 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its-pci-msi.c b/drivers/irqchip/irq-gic-v3-its-pci-msi.c
index aee60ed025dc..d2c2496d61e9 100644
--- a/drivers/irqchip/irq-gic-v3-its-pci-msi.c
+++ b/drivers/irqchip/irq-gic-v3-its-pci-msi.c
@@ -106,34 +106,48 @@ static struct of_device_id its_device_id[] = {
{},
};
-static int __init its_pci_msi_init(void)
+static int __init its_pci_msi_init_one(struct fwnode_handle *handle,
+ const char *name)
{
- struct device_node *np;
struct irq_domain *parent;
+ parent = irq_find_matching_fwnode(handle, DOMAIN_BUS_NEXUS);
+ if (!parent || !msi_get_domain_info(parent)) {
+ pr_err("%s: Unable to locate ITS domain\n", name);
+ return -ENXIO;
+ }
+
+ if (!pci_msi_create_irq_domain(handle, &its_pci_msi_domain_info,
+ parent)) {
+ pr_err("%s: Unable to create PCI domain\n", name);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int __init its_pci_of_msi_init(void)
+{
+ struct device_node *np;
+
for (np = of_find_matching_node(NULL, its_device_id); np;
np = of_find_matching_node(np, its_device_id)) {
if (!of_property_read_bool(np, "msi-controller"))
continue;
- parent = irq_find_matching_host(np, DOMAIN_BUS_NEXUS);
- if (!parent || !msi_get_domain_info(parent)) {
- pr_err("%s: unable to locate ITS domain\n",
- np->full_name);
+ if (its_pci_msi_init_one(of_node_to_fwnode(np), np->full_name))
continue;
- }
-
- if (!pci_msi_create_irq_domain(of_node_to_fwnode(np),
- &its_pci_msi_domain_info,
- parent)) {
- pr_err("%s: unable to create PCI domain\n",
- np->full_name);
- continue;
- }
pr_info("PCI/MSI: %s domain created\n", np->full_name);
}
return 0;
}
+
+static int __init its_pci_msi_init(void)
+{
+ its_pci_of_msi_init();
+
+ return 0;
+}
early_initcall(its_pci_msi_init);