| Message ID | 1365541601-14095-6-git-send-email-thomas.petazzoni@free-electrons.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On 04/09/2013 04:06 PM, Thomas Petazzoni wrote: > From: Thierry Reding <thierry.reding@avionic-design.de> > > This function can be used to parse a bus-range property as specified by > device nodes representing PCI bridges. > > Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de> Reviewed-by: Rob Herring <rob.herring@calxeda.com> > --- > drivers/of/of_pci.c | 25 +++++++++++++++++++++++++ > include/linux/of_pci.h | 1 + > 2 files changed, 26 insertions(+) > > diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c > index b77e8d8..e9106dc 100644 > --- a/drivers/of/of_pci.c > +++ b/drivers/of/of_pci.c > @@ -232,3 +232,28 @@ int of_pci_get_devfn(struct device_node *np) > return (be32_to_cpup(reg) >> 8) & 0xff; > } > EXPORT_SYMBOL_GPL(of_pci_get_devfn); > + > +/** > + * of_pci_parse_bus_range() - parse the bus-range property of a PCI device > + * @node: device node > + * @res: address to a struct resource to return the bus-range > + * > + * Returns 0 on success or a negative error-code on failure. > + */ > +int of_pci_parse_bus_range(struct device_node *node, struct resource *res) > +{ > + const __be32 *values; > + int len; > + > + values = of_get_property(node, "bus-range", &len); > + if (!values || len < sizeof(*values) * 2) > + return -EINVAL; > + > + res->name = node->name; > + res->start = be32_to_cpup(values++); > + res->end = be32_to_cpup(values); > + res->flags = IORESOURCE_BUS; > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(of_pci_parse_bus_range); > diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h > index 302aca0..be97a6f 100644 > --- a/include/linux/of_pci.h > +++ b/include/linux/of_pci.h > @@ -12,6 +12,7 @@ struct device_node; > struct device_node *of_pci_find_child_device(struct device_node *parent, > unsigned int devfn); > int of_pci_get_devfn(struct device_node *np); > +int of_pci_parse_bus_range(struct device_node *node, struct resource *res); > > void pci_process_bridge_OF_ranges(struct pci_controller *hose, > struct device_node *dev, int primary); > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c index b77e8d8..e9106dc 100644 --- a/drivers/of/of_pci.c +++ b/drivers/of/of_pci.c @@ -232,3 +232,28 @@ int of_pci_get_devfn(struct device_node *np) return (be32_to_cpup(reg) >> 8) & 0xff; } EXPORT_SYMBOL_GPL(of_pci_get_devfn); + +/** + * of_pci_parse_bus_range() - parse the bus-range property of a PCI device + * @node: device node + * @res: address to a struct resource to return the bus-range + * + * Returns 0 on success or a negative error-code on failure. + */ +int of_pci_parse_bus_range(struct device_node *node, struct resource *res) +{ + const __be32 *values; + int len; + + values = of_get_property(node, "bus-range", &len); + if (!values || len < sizeof(*values) * 2) + return -EINVAL; + + res->name = node->name; + res->start = be32_to_cpup(values++); + res->end = be32_to_cpup(values); + res->flags = IORESOURCE_BUS; + + return 0; +} +EXPORT_SYMBOL_GPL(of_pci_parse_bus_range); diff --git a/include/linux/of_pci.h b/include/linux/of_pci.h index 302aca0..be97a6f 100644 --- a/include/linux/of_pci.h +++ b/include/linux/of_pci.h @@ -12,6 +12,7 @@ struct device_node; struct device_node *of_pci_find_child_device(struct device_node *parent, unsigned int devfn); int of_pci_get_devfn(struct device_node *np); +int of_pci_parse_bus_range(struct device_node *node, struct resource *res); void pci_process_bridge_OF_ranges(struct pci_controller *hose, struct device_node *dev, int primary);