pci: pci_mvebu: Setup PCI controller to Root Complex mode

Root Complex should be the default mode, let's set it explicitly.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/drivers/pci/pci_mvebu.c b/drivers/pci/pci_mvebu.c
index 4c7fd8d..a327a83 100644 (file)
--- a/drivers/pci/pci_mvebu.c
+++ b/drivers/pci/pci_mvebu.c
@@ -62,6 +62,7 @@ DECLARE_GLOBAL_DATA_PTR;
 #define  PCIE_MASK_ENABLE_INTS          (0xf << 24)
 #define PCIE_CTRL_OFF                  0x1a00
 #define  PCIE_CTRL_X1_MODE             BIT(0)
+#define  PCIE_CTRL_RC_MODE             BIT(1)
 #define PCIE_STAT_OFF                  0x1a04
 #define  PCIE_STAT_BUS                  (0xff << 8)
 #define  PCIE_STAT_DEV                  (0x1f << 16)
@@ -373,6 +374,11 @@ static int mvebu_pcie_probe(struct udevice *dev)
        struct pci_controller *hose = dev_get_uclass_priv(ctlr);
        u32 reg;
 
+       /* Setup PCIe controller to Root Complex mode */
+       reg = readl(pcie->base + PCIE_CTRL_OFF);
+       reg |= PCIE_CTRL_RC_MODE;
+       writel(reg, pcie->base + PCIE_CTRL_OFF);
+
        /*
         * Change Class Code of PCI Bridge device to PCI Bridge (0x600400)
         * because default value is Memory controller (0x508000) which