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Commit 7af4ce35 authored by Minghuan Lian's avatar Minghuan Lian Committed by Bjorn Helgaas
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PCI: layerscape: Ignore PCIe controllers in Endpoint mode 



Layerscape PCIe controller supports root complex (RC) and endpoint (EP)
modes, which can be set by RCW.

If not in RC mode, return -ENODEV without claiming the controller.

Signed-off-by: default avatarMinghuan Lian <Minghuan.Lian@freescale.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 72f71afb

drivers/pci/host/pci-layerscape.c

+13 −0
Original line number Diff line number Diff line
@@ -47,6 +47,16 @@ struct ls_pcie { 


#define to_ls_pcie(x)	container_of(x, struct ls_pcie, pp)



static bool ls_pcie_is_bridge(struct ls_pcie *pcie)

{

	u32 header_type;



	header_type = ioread8(pcie->dbi + PCI_HEADER_TYPE);

	header_type &= 0x7f;



	return header_type == PCI_HEADER_TYPE_BRIDGE;

}



static int ls_pcie_link_up(struct pcie_port *pp)

{

	u32 state;
@@ -135,6 +145,9 @@ static int __init ls_pcie_probe(struct platform_device *pdev) 
		return ret;

	pcie->index = index[1];



	if (!ls_pcie_is_bridge(pcie))

		return -ENODEV;



	ret = ls_add_pcie_port(pcie);

	if (ret < 0)

		return ret;