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PCI: rockchip: Convert PCI scan API to pci_scan_root_bus_bridge()

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The introduction of pci_scan_root_bus_bridge() provides a PCI core API to
scan a PCI root bus backed by an already initialized struct pci_host_bridge
object, which simplifies the bus scan interface and makes the PCI scan root
bus interface easier to generalize as members are added to the struct
pci_host_bridge.

Convert PCI rockchip host code to pci_scan_root_bus_bridge() to improve the
PCI root bus scanning interface.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Wenrui Li <wenrui.li@rock-chips.com>
Cc: Shawn Lin <shawn.lin@rock-chips.com>
This commit is contained in:
Lorenzo Pieralisi 2017-06-28 15:14:00 -05:00 committed by Bjorn Helgaas
parent 4246a86472
commit ae13cb9b19
1 changed files with 16 additions and 6 deletions
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22
drivers/pci/host/pcie-rockchip.c
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@ -1284,6 +1284,7 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
struct rockchip_pcie *rockchip;
struct device *dev = &pdev->dev;
struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
struct resource_entry *win;
resource_size_t io_base;
struct resource *mem;
@ -1295,10 +1296,12 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
if (!dev->of_node)
return -ENODEV;
rockchip = devm_kzalloc(dev, sizeof(*rockchip), GFP_KERNEL);
if (!rockchip)
bridge = devm_pci_alloc_host_bridge(dev, sizeof(*rockchip));
if (!bridge)
return -ENOMEM;
rockchip = pci_host_bridge_priv(bridge);
platform_set_drvdata(pdev, rockchip);
rockchip->dev = dev;
@ -1396,11 +1399,18 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
goto err_free_res;
}
bus = pci_scan_root_bus(&pdev->dev, 0, &rockchip_pcie_ops, rockchip, &res);
if (!bus) {
err = -ENOMEM;
list_splice_init(&res, &bridge->windows);
bridge->dev.parent = &pdev->dev;
bridge->sysdata = rockchip;
bridge->busnr = 0;
bridge->ops = &rockchip_pcie_ops;
err = pci_scan_root_bus_bridge(bridge);
if (!err)
goto err_free_res;
}
bus = bridge->bus;
rockchip->root_bus = bus;
pci_bus_size_bridges(bus);