PCI: dwc: Fix EP link notification implementation

Move specific features settings from EP shared code
(pcie-designware-ep.c) to the driver (pcie-designware-plat.c).

Previous implementation disables the EP link notification
by default for all SoCs that uses EP DesignWare IP, which affects
directly the dra7xx and artpec6 SoCs.

Signed-off-by: Gustavo Pimentel <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Acked-by: Kishon Vijay Abraham I <[email protected]>

Author: gustavoSNPS

drivers/pci/controller/dwc/pcie-designware-ep.c

@@ -386,15 +386,18 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 		return -ENOMEM;
 	ep->outbound_addr = addr;
 
-	if (ep->ops->ep_init)
-		ep->ops->ep_init(ep);
-
 	epc = devm_pci_epc_create(dev, &epc_ops);
 	if (IS_ERR(epc)) {
 		dev_err(dev, "Failed to create epc device\n");
 		return PTR_ERR(epc);
 	}
 
+	ep->epc = epc;
+	epc_set_drvdata(epc, ep);
+
+	if (ep->ops->ep_init)
+		ep->ops->ep_init(ep);
+
 	ret = of_property_read_u8(np, "max-functions", &epc->max_functions);
 	if (ret < 0)
 		epc->max_functions = 1;
@@ -413,11 +416,6 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
 		return -ENOMEM;
 	}
 
-	epc->features = EPC_FEATURE_NO_LINKUP_NOTIFIER;
-	EPC_FEATURE_SET_BAR(epc->features, BAR_0);
-
-	ep->epc = epc;
-	epc_set_drvdata(epc, ep);
 	dw_pcie_setup(pci);
 
 	return 0;

drivers/pci/controller/dwc/pcie-designware-plat.c

@@ -70,10 +70,13 @@ static const struct dw_pcie_ops dw_pcie_ops = {
 static void dw_plat_pcie_ep_init(struct dw_pcie_ep *ep)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+	struct pci_epc *epc = ep->epc;
 	enum pci_barno bar;
 
 	for (bar = BAR_0; bar <= BAR_5; bar++)
 		dw_pcie_ep_reset_bar(pci, bar);
+
+	epc->features |= EPC_FEATURE_NO_LINKUP_NOTIFIER;
 }
 
 static int dw_plat_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,