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authorThierry Reding <treding@nvidia.com>2014-08-26 17:33:54 +0200
committerSimon Glass <sjg@chromium.org>2014-10-22 16:56:41 -0600
commit9f85eee72a2a3918b2d5cd7b1bf88da69232dede (patch)
tree18ad49344920b3e9721550b4172f623f126412f9 /lib
parent56f42242f020254ea1c383694edb072e3a5ca6d6 (diff)
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fdt: Add a function to return PCI BDF triplet
The fdtdec_pci_get_bdf() function returns the bus, device, function triplet of a PCI device by parsing the "reg" property according to the PCI device tree binding. Acked-by: Simon Glass <sjg@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'lib')
-rw-r--r--lib/fdtdec.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index b3c43be..4f66ae1 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -765,4 +765,18 @@ int fdt_get_named_resource(const void *fdt, int node, const char *property,
return fdt_get_resource(fdt, node, property, index, res);
}
+
+int fdtdec_pci_get_bdf(const void *fdt, int node, int *bdf)
+{
+ const fdt32_t *prop;
+ int len;
+
+ prop = fdt_getprop(fdt, node, "reg", &len);
+ if (!prop)
+ return len;
+
+ *bdf = fdt32_to_cpu(*prop) & 0xffffff;
+
+ return 0;
+}
#endif