[U-Boot] [PATCH] fdtdec: Improve fdtdec_get_pci_bdf() documentation

[Bin Meng]

Add the description that how the compatible property is involved in
the fdtdec_get_pci_bdf() documentation.

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
---

 include/fdtdec.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/fdtdec.h b/include/fdtdec.h
index 1bc70db..eef78a7 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -346,7 +346,10 @@ int fdtdec_get_pci_vendev(const void *blob, int node,
 
 /**
  * Look at the pci address of a device node that represents a PCI device
- * and parse the bus, device and function number from it.
+ * and parse the bus, device and function number from it. For some cases
+ * like the bus number encoded in reg property is not correct after pci
+ * enumeration, this function looks through the node's compatible strings
+ * to get these numbers extracted instead.
  *
  * @param blob		FDT blob
  * @param node		node to examine
-- 
1.8.2.1