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 --- drivers/pci/pci_mvebu.c | 6 ++++++ 1 file changed, 6 insertions(+)

diff --git a/drivers/pci/pci_mvebu.c b/drivers/pci/pci_mvebu.c index 6026fa67f9..e21dc10c2f 100644 --- a/drivers/pci/pci_mvebu.c +++ b/drivers/pci/pci_mvebu.c @@ -369,6 +369,12 @@ static int mvebu_get_tgt_attr(ofnode node, int devfn, 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;