Merge remote-tracking branch 'devicetree/devicetree/next'

[karo-tx-linux.git] / drivers / of / of_pci.c

diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c
index 42c687a820ac3bedcb0eae90b64e8c4911509d09..e5ca00893c0c300979aec82a5fd764d1bde87192 100644 (file)
--- a/drivers/of/of_pci.c
+++ b/drivers/of/of_pci.c
@@ -89,3 +89,48 @@ int of_pci_parse_bus_range(struct device_node *node, struct resource *res)
        return 0;
 }
 EXPORT_SYMBOL_GPL(of_pci_parse_bus_range);
+
+#ifdef CONFIG_PCI_MSI
+
+static LIST_HEAD(of_pci_msi_chip_list);
+static DEFINE_MUTEX(of_pci_msi_chip_mutex);
+
+int of_pci_msi_chip_add(struct msi_chip *chip)
+{
+       if (!of_property_read_bool(chip->of_node, "msi-controller"))
+               return -EINVAL;
+
+       mutex_lock(&of_pci_msi_chip_mutex);
+       list_add(&chip->list, &of_pci_msi_chip_list);
+       mutex_unlock(&of_pci_msi_chip_mutex);
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(of_pci_msi_chip_add);
+
+void of_pci_msi_chip_remove(struct msi_chip *chip)
+{
+       mutex_lock(&of_pci_msi_chip_mutex);
+       list_del(&chip->list);
+       mutex_unlock(&of_pci_msi_chip_mutex);
+}
+EXPORT_SYMBOL_GPL(of_pci_msi_chip_remove);
+
+struct msi_chip *of_pci_find_msi_chip_by_node(struct device_node *of_node)
+{
+       struct msi_chip *c;
+
+       mutex_lock(&of_pci_msi_chip_mutex);
+       list_for_each_entry(c, &of_pci_msi_chip_list, list) {
+               if (c->of_node == of_node) {
+                       mutex_unlock(&of_pci_msi_chip_mutex);
+                       return c;
+               }
+       }
+       mutex_unlock(&of_pci_msi_chip_mutex);
+
+       return NULL;
+}
+EXPORT_SYMBOL_GPL(of_pci_find_msi_chip_by_node);
+
+#endif /* CONFIG_PCI_MSI */