diff options
Diffstat (limited to 'drivers/pci/of.c')
| -rw-r--r-- | drivers/pci/of.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/pci/of.c b/drivers/pci/of.c index 5ea472ae22ac..da5b414d585a 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -190,10 +190,18 @@ int of_pci_parse_bus_range(struct device_node *node, struct resource *res) EXPORT_SYMBOL_GPL(of_pci_parse_bus_range); /** - * This function will try to obtain the host bridge domain number by - * finding a property called "linux,pci-domain" of the given device node. + * of_get_pci_domain_nr - Find the host bridge domain number + * of the given device node. + * @node: Device tree node with the domain information. * - * @node: device tree node with the domain information + * This function will try to obtain the host bridge domain number by finding + * a property called "linux,pci-domain" of the given device node. + * + * Return: + * * > 0 - On success, an associated domain number. + * * -EINVAL - The property "linux,pci-domain" does not exist. + * * -ENODATA - The linux,pci-domain" property does not have value. + * * -EOVERFLOW - Invalid "linux,pci-domain" property value. * * Returns the associated domain number from DT in the range [0-0xffff], or * a negative value if the required property is not found. @@ -585,10 +593,16 @@ int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge) #endif /* CONFIG_PCI */ /** + * of_pci_get_max_link_speed - Find the maximum link speed of the given device node. + * @node: Device tree node with the maximum link speed information. + * * This function will try to find the limitation of link speed by finding * a property called "max-link-speed" of the given device node. * - * @node: device tree node with the max link speed information + * Return: + * * > 0 - On success, a maximum link speed. + * * -EINVAL - Invalid "max-link-speed" property value, or failure to access + * the property of the device tree node. * * Returns the associated max link speed from DT, or a negative value if the * required property is not found or is invalid. |