dm: pci: change bus number register setting compliant with Linux

This patch is to change U-Boot PCI bus assignement compliant with Linux.
It means each PCIe controller's bus number is 0, not the current maximum
PCI bus number, when start to scan this controller.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

drivers/pci/pci_auto.c

@@ -181,8 +181,8 @@ void dm_pciauto_prescan_setup_bridge(struct udevice *dev, int sub_bus)
 
 	/* Configure bus number registers */
 	dm_pci_write_config8(dev, PCI_PRIMARY_BUS,
-			     PCI_BUS(dm_pci_get_bdf(dev)));
-	dm_pci_write_config8(dev, PCI_SECONDARY_BUS, sub_bus);
+			     PCI_BUS(dm_pci_get_bdf(dev)) - ctlr->seq);
+	dm_pci_write_config8(dev, PCI_SECONDARY_BUS, sub_bus - ctlr->seq);
 	dm_pci_write_config8(dev, PCI_SUBORDINATE_BUS, 0xff);
 
 	if (pci_mem) {
@@ -257,7 +257,7 @@ void dm_pciauto_postscan_setup_bridge(struct udevice *dev, int sub_bus)
 	pci_io = ctlr_hose->pci_io;
 
 	/* Configure bus number registers */
-	dm_pci_write_config8(dev, PCI_SUBORDINATE_BUS, sub_bus);
+	dm_pci_write_config8(dev, PCI_SUBORDINATE_BUS, sub_bus - ctlr->seq);
 
 	if (pci_mem) {
 		/* Round memory allocator to 1MB boundary */

drivers/pci/pcie_dw_mvebu.c

@@ -162,6 +162,7 @@ static uintptr_t set_cfg_address(struct pcie_dw_mvebu *pcie,
 		/* Accessing root port configuration space. */
 		va_address = (uintptr_t)pcie->ctrl_base;
 	} else {
+		d = PCI_MASK_BUS(d) | (PCI_BUS(d) - pcie->first_busno);
 		writel(d << 8, pcie->ctrl_base + PCIE_ATU_LOWER_TARGET);
 		va_address = (uintptr_t)pcie->cfg_base;
 	}

drivers/pci/pcie_layerscape.c

@@ -255,7 +255,7 @@ int ls_pcie_conf_address(struct udevice *bus, pci_dev_t bdf,
 		return 0;
 	}
 
-	busdev = PCIE_ATU_BUS(PCI_BUS(bdf)) |
+	busdev = PCIE_ATU_BUS(PCI_BUS(bdf) - bus->seq) |
 		 PCIE_ATU_DEV(PCI_DEV(bdf)) |
 		 PCIE_ATU_FUNC(PCI_FUNC(bdf));