[ARM] Orion: fix PCIe inbound window programming when RAM size is not a power of two

The PCIe inbound window size is supposed to be a power of two.  If
the total amount of RAM installed in the system is not a power of two,
round it up such that it is.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arm/plat-orion/pcie.c b/arch/arm/plat-orion/pcie.c
index d41d41d78ad9..54c84a492a0f 100644
--- a/arch/arm/plat-orion/pcie.c
+++ b/arch/arm/plat-orion/pcie.c
@@ -133,6 +133,12 @@ static void __init orion_pcie_setup_wins(void __iomem *base,
         }
 
         /*
+         * Round up 'size' to the nearest power of two.
+         */
+        if ((size & (size - 1)) != 0)
+                size = 1 << fls(size);
+
+        /*
          * Setup BAR[1] to all DRAM banks.
          */
         writel(dram->cs[0].base, base + PCIE_BAR_LO_OFF(1));