[PATCH u-boot 3/3] pci: mpc85xx: Do not try to access extended PCIe registers

[Pali Rohár]

Driver pci_mpc85xx.c is PCI controller driver for old PCI Local Bus,
which does not support access to extended PCIe registers (above 0xff),
as opposite of the PCIe driver pcie_fsl.c for the same platform.

So do not try to access extended PCIe registers as it cannot work.

Signed-off-by: Pali Rohár <pali at kernel.org>
---
 drivers/pci/pci_mpc85xx.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/pci_mpc85xx.c b/drivers/pci/pci_mpc85xx.c
index d144f2b791b8..833de816c459 100644
--- a/drivers/pci/pci_mpc85xx.c
+++ b/drivers/pci/pci_mpc85xx.c
@@ -22,7 +22,12 @@ static int mpc85xx_pci_dm_read_config(const struct udevice *dev, pci_dev_t bdf,
 	struct mpc85xx_pci_priv *priv = dev_get_priv(dev);
 	u32 addr;
 
-	addr = PCI_CONF1_EXT_ADDRESS(PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf), offset);
+	if (offset > 0xff) {
+		*value = pci_get_ff(size);
+		return 0;
+	}
+
+	addr = PCI_CONF1_ADDRESS(PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf), offset);
 	out_be32(priv->cfg_addr, addr);
 	sync();
 
@@ -48,7 +53,10 @@ static int mpc85xx_pci_dm_write_config(struct udevice *dev, pci_dev_t bdf,
 	struct mpc85xx_pci_priv *priv = dev_get_priv(dev);
 	u32 addr;
 
-	addr = PCI_CONF1_EXT_ADDRESS(PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf), offset);
+	if (offset > 0xff)
+		return 0;
+
+	addr = PCI_CONF1_ADDRESS(PCI_BUS(bdf), PCI_DEV(bdf), PCI_FUNC(bdf), offset);
 	out_be32(priv->cfg_addr, addr);
 	sync();
 
-- 
2.20.1