powerpc/fsl_uli1575: fix RTC quirk to work on MPC8572DS and MPC8610HPCD

This patch fixes RTC on MPC8572DS boards: dummy read helps only when
reading at the end of the bridge's memory (i.e. outside of behind the
bridge devices' assigned regions).

With this change the quirk also makes RTC work on MPC8610HPCD, so it's
unlikely that this will break MPC8641HPCN or MPC8544DS boards.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/arch/powerpc/platforms/fsl_uli1575.c b/arch/powerpc/platforms/fsl_uli1575.c
index afc9141be63eaf5f72d31ad82c155e45e2fc127e..756561c51597a44f6fbf2433e4de59929ca1b658 100644 (file)
--- a/arch/powerpc/platforms/fsl_uli1575.c
+++ b/arch/powerpc/platforms/fsl_uli1575.c
@@ -221,7 +221,7 @@ static void __devinit quirk_final_uli5249(struct pci_dev *dev)
        for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
                if ((bus->resource[i]) &&
                        (bus->resource[i]->flags & IORESOURCE_MEM)) {
-                       dummy = ioremap(bus->resource[i]->start, 0x4);
+                       dummy = ioremap(bus->resource[i]->end - 3, 0x4);
                        if (dummy) {
                                in_8(dummy);
                                iounmap(dummy);