diff options
| -rw-r--r-- | include/fdtdec.h | 13 | ||||
| -rw-r--r-- | lib/fdtdec.c | 16 |
2 files changed, 29 insertions, 0 deletions
diff --git a/include/fdtdec.h b/include/fdtdec.h index bc79389..152eb07 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -445,6 +445,19 @@ int fdtdec_get_pci_bar32(const struct udevice *dev, struct fdt_pci_addr *addr, u32 *bar); /** + * Look at the bus range property of a device node and return the pci bus + * range for this node. + * The property must hold one fdt_pci_addr with a length. + * @param blob FDT blob + * @param node node to examine + * @param res the resource structure to return the bus range + * @return 0 if ok, negative on error + */ + +int fdtdec_get_pci_bus_range(const void *blob, int node, + struct fdt_resource *res); + +/** * Look up a 32-bit integer property in a node and return it. The property * must have at least 4 bytes of data. The value of the first cell is * returned. diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 30a1c6a..d3b22ec 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -243,6 +243,22 @@ int fdtdec_get_pci_bar32(const struct udevice *dev, struct fdt_pci_addr *addr, return 0; } + +int fdtdec_get_pci_bus_range(const void *blob, int node, + struct fdt_resource *res) +{ + const u32 *values; + int len; + + values = fdt_getprop(blob, node, "bus-range", &len); + if (!values || len < sizeof(*values) * 2) + return -EINVAL; + + res->start = fdt32_to_cpu(*values++); + res->end = fdt32_to_cpu(*values); + + return 0; +} #endif uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, |