From: Suneel Garapati sgarapati@marvell.com
Add fdtdec_get_pci_bus_range to read bus-range property values.
Signed-off-by: Suneel Garapati sgarapati@marvell.com Reviewed-by: Simon Glass sjg@chromium.org
Signed-off-by: Stefan Roese sr@denx.de ---
Changes in v2: - Add Reviewed-by tag from Simon
Changes in v1: - Add return value description to function prototype in header - Changed from using be32_to_cpup() to fdt32_to_cpu()
include/fdtdec.h | 13 +++++++++++++ lib/fdtdec.c | 16 ++++++++++++++++ 2 files changed, 29 insertions(+)
diff --git a/include/fdtdec.h b/include/fdtdec.h index 760b392bdf..f6759c7f8e 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -444,6 +444,19 @@ int fdtdec_get_pci_vendev(const void *blob, int node, 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 diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 78576b530f..0b40fa374a 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -242,6 +242,22 @@ 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,