pci: pci_mvebu: Add comment about missing of_n_addr_cells() call
This patch adds a comment to explain the use of the hardcoded value for
the number of address cells in mvebu_get_tgt_attr(). This should help to
rework this function, once CONFIG_OF_LIVE is enabled for MVEBU in
general.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/pci/pci_mvebu.c b/drivers/pci/pci_mvebu.c
index 6026fa6..e21dc10 100644
--- a/drivers/pci/pci_mvebu.c
+++ b/drivers/pci/pci_mvebu.c
@@ -369,6 +369,12 @@
if (!range)
return -EINVAL;
+ /*
+ * Linux uses of_n_addr_cells() to get the number of address cells
+ * here. Currently this function is only available in U-Boot when
+ * CONFIG_OF_LIVE is enabled. Until this is enabled for MVEBU in
+ * general, lets't hardcode the "pna" value in the U-Boot code.
+ */
pna = 2; /* hardcoded for now because of lack of of_n_addr_cells() */
rangesz = pna + na + ns;
nranges = rlen / sizeof(__be32) / rangesz;