Revert "PCI: layerscape: Add the endpoint linkup notifier support"

This reverts commit 4be323c73797bcebd0f9d1642e4705c13c3749d2.

Downstream NXP and stable have deviated to far, do not pull this in.

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>

1 files changed, 1 insertions, 99 deletions

diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c b/drivers/pci/controller/dwc/pci-layerscape-ep.c
index 5b27554e071a..ad99707b3b99 100644
--- a/drivers/pci/controller/dwc/pci-layerscape-ep.c
+++ b/drivers/pci/controller/dwc/pci-layerscape-ep.c
@@ -18,20 +18,6 @@
 
 #include "pcie-designware.h"
 
-#define PEX_PF0_CONFIG			0xC0014
-#define PEX_PF0_CFG_READY		BIT(0)
-
-/* PEX PFa PCIE PME and message interrupt registers*/
-#define PEX_PF0_PME_MES_DR		0xC0020
-#define PEX_PF0_PME_MES_DR_LUD		BIT(7)
-#define PEX_PF0_PME_MES_DR_LDD		BIT(9)
-#define PEX_PF0_PME_MES_DR_HRD		BIT(10)
-
-#define PEX_PF0_PME_MES_IER		0xC0028
-#define PEX_PF0_PME_MES_IER_LUDIE	BIT(7)
-#define PEX_PF0_PME_MES_IER_LDDIE	BIT(9)
-#define PEX_PF0_PME_MES_IER_HRDIE	BIT(10)
-
 #define to_ls_pcie_ep(x)	dev_get_drvdata((x)->dev)
 
 struct ls_pcie_ep_drvdata {
@@ -44,84 +30,8 @@ struct ls_pcie_ep {
 	struct dw_pcie			*pci;
 	struct pci_epc_features		*ls_epc;
 	const struct ls_pcie_ep_drvdata *drvdata;
-	int				irq;
-	bool				big_endian;
 };
 
-static u32 ls_lut_readl(struct ls_pcie_ep *pcie, u32 offset)
-{
-	struct dw_pcie *pci = pcie->pci;
-
-	if (pcie->big_endian)
-		return ioread32be(pci->dbi_base + offset);
-	else
-		return ioread32(pci->dbi_base + offset);
-}
-
-static void ls_lut_writel(struct ls_pcie_ep *pcie, u32 offset, u32 value)
-{
-	struct dw_pcie *pci = pcie->pci;
-
-	if (pcie->big_endian)
-		iowrite32be(value, pci->dbi_base + offset);
-	else
-		iowrite32(value, pci->dbi_base + offset);
-}
-
-static irqreturn_t ls_pcie_ep_event_handler(int irq, void *dev_id)
-{
-	struct ls_pcie_ep *pcie = dev_id;
-	struct dw_pcie *pci = pcie->pci;
-	u32 val, cfg;
-
-	val = ls_lut_readl(pcie, PEX_PF0_PME_MES_DR);
-	ls_lut_writel(pcie, PEX_PF0_PME_MES_DR, val);
-
-	if (!val)
-		return IRQ_NONE;
-
-	if (val & PEX_PF0_PME_MES_DR_LUD) {
-		cfg = ls_lut_readl(pcie, PEX_PF0_CONFIG);
-		cfg |= PEX_PF0_CFG_READY;
-		ls_lut_writel(pcie, PEX_PF0_CONFIG, cfg);
-		dw_pcie_ep_linkup(&pci->ep);
-
-		dev_dbg(pci->dev, "Link up\n");
-	} else if (val & PEX_PF0_PME_MES_DR_LDD) {
-		dev_dbg(pci->dev, "Link down\n");
-	} else if (val & PEX_PF0_PME_MES_DR_HRD) {
-		dev_dbg(pci->dev, "Hot reset\n");
-	}
-
-	return IRQ_HANDLED;
-}
-
-static int ls_pcie_ep_interrupt_init(struct ls_pcie_ep *pcie,
-				     struct platform_device *pdev)
-{
-	u32 val;
-	int ret;
-
-	pcie->irq = platform_get_irq_byname(pdev, "pme");
-	if (pcie->irq < 0)
-		return pcie->irq;
-
-	ret = devm_request_irq(&pdev->dev, pcie->irq, ls_pcie_ep_event_handler,
-			       IRQF_SHARED, pdev->name, pcie);
-	if (ret) {
-		dev_err(&pdev->dev, "Can't register PCIe IRQ\n");
-		return ret;
-	}
-
-	/* Enable interrupts */
-	val = ls_lut_readl(pcie, PEX_PF0_PME_MES_IER);
-	val |=  PEX_PF0_PME_MES_IER_LDDIE | PEX_PF0_PME_MES_IER_HRDIE |
-		PEX_PF0_PME_MES_IER_LUDIE;
-	ls_lut_writel(pcie, PEX_PF0_PME_MES_IER, val);
-
-	return 0;
-}
-
 static const struct pci_epc_features*
 ls_pcie_ep_get_features(struct dw_pcie_ep *ep)
 {
@@ -214,7 +124,6 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
 	struct ls_pcie_ep *pcie;
 	struct pci_epc_features *ls_epc;
 	struct resource *dbi_base;
-	int ret;
 
 	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
 	if (!pcie)
@@ -234,7 +143,6 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
 	pci->ops = pcie->drvdata->dw_pcie_ops;
 
 	ls_epc->bar_fixed_64bit = (1 << BAR_2) | (1 << BAR_4);
-	ls_epc->linkup_notifier = true;
 
 	pcie->pci = pci;
 	pcie->ls_epc = ls_epc;
@@ -246,15 +154,9 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
 
 	pci->ep.ops = &ls_pcie_ep_ops;
 
-	pcie->big_endian = of_property_read_bool(dev->of_node, "big-endian");
-
 	platform_set_drvdata(pdev, pcie);
 
-	ret = dw_pcie_ep_init(&pci->ep);
-	if (ret)
-		return ret;
-
-	return ls_pcie_ep_interrupt_init(pcie, pdev);
+	return dw_pcie_ep_init(&pci->ep);
 }
 
 static struct platform_driver ls_pcie_ep_driver = {