diff options
Diffstat (limited to 'drivers/pci/of.c')
| -rw-r--r-- | drivers/pci/of.c | 32 |
1 files changed, 25 insertions, 7 deletions
diff --git a/drivers/pci/of.c b/drivers/pci/of.c index 196834ed44fe..2c25f4fa0225 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -16,14 +16,32 @@ #include "pci.h" #ifdef CONFIG_PCI -void pci_set_of_node(struct pci_dev *dev) +/** + * pci_set_of_node - Find and set device's DT device_node + * @dev: the PCI device structure to fill + * + * Returns 0 on success with of_node set or when no device is described in the + * DT. Returns -ENODEV if the device is present, but disabled in the DT. + */ +int pci_set_of_node(struct pci_dev *dev) { + struct device_node *node; + if (!dev->bus->dev.of_node) - return; - dev->dev.of_node = of_pci_find_child_device(dev->bus->dev.of_node, - dev->devfn); - if (dev->dev.of_node) - dev->dev.fwnode = &dev->dev.of_node->fwnode; + return 0; + + node = of_pci_find_child_device(dev->bus->dev.of_node, dev->devfn); + if (!node) + return 0; + + if (!of_device_is_available(node)) { + of_node_put(node); + return -ENODEV; + } + + dev->dev.of_node = node; + dev->dev.fwnode = &node->fwnode; + return 0; } void pci_release_of_node(struct pci_dev *dev) @@ -447,7 +465,7 @@ static int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args * return -ENODEV; /* Local interrupt-map in the device node? Use it! */ - if (of_get_property(dn, "interrupt-map", NULL)) { + if (of_property_present(dn, "interrupt-map")) { pin = pci_swizzle_interrupt_pin(pdev, pin); ppnode = dn; } |