linux-kernel - [PATCH v7 03/10] PCI: imx6: Fetch dbi2 and iATU base addesses from DT

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Message-Id: <20241126075702.4099164-4-hongxing.zhu@nxp.com>
Date: Tue, 26 Nov 2024 15:56:55 +0800
From: Richard Zhu <hongxing.zhu@....com>
To: l.stach@...gutronix.de,
	bhelgaas@...gle.com,
	lpieralisi@...nel.org,
	kw@...ux.com,
	manivannan.sadhasivam@...aro.org,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	shawnguo@...nel.org,
	frank.li@....com,
	s.hauer@...gutronix.de,
	festevam@...il.com
Cc: imx@...ts.linux.dev,
	kernel@...gutronix.de,
	linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Richard Zhu <hongxing.zhu@....com>
Subject: [PATCH v7 03/10] PCI: imx6: Fetch dbi2 and iATU base addesses from DT

Since dw_pcie_get_resources() gets the dbi2 and iATU base addresses from
DT, remove the code from imx6 driver that does the same.

Upsteam dts's have not enabled EP function. So no function broken for
old upsteam's dtb.

Signed-off-by: Richard Zhu <hongxing.zhu@....com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/pci/controller/dwc/pci-imx6.c | 23 -----------------------
 1 file changed, 23 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index f7e928e0a018..81f1f68ccc14 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -1114,7 +1114,6 @@ static int imx_add_pcie_ep(struct imx_pcie *imx_pcie,
 			   struct platform_device *pdev)
 {
 	int ret;
-	unsigned int pcie_dbi2_offset;
 	struct dw_pcie_ep *ep;
 	struct dw_pcie *pci = imx_pcie->pci;
 	struct dw_pcie_rp *pp = &pci->pp;
@@ -1124,28 +1123,6 @@ static int imx_add_pcie_ep(struct imx_pcie *imx_pcie,
 	ep = &pci->ep;
 	ep->ops = &pcie_ep_ops;
 
-	switch (imx_pcie->drvdata->variant) {
-	case IMX8MQ_EP:
-	case IMX8MM_EP:
-	case IMX8MP_EP:
-		pcie_dbi2_offset = SZ_1M;
-		break;
-	default:
-		pcie_dbi2_offset = SZ_4K;
-		break;
-	}
-
-	pci->dbi_base2 = pci->dbi_base + pcie_dbi2_offset;
-
-	/*
-	 * FIXME: Ideally, dbi2 base address should come from DT. But since only IMX95 is defining
-	 * "dbi2" in DT, "dbi_base2" is set to NULL here for that platform alone so that the DWC
-	 * core code can fetch that from DT. But once all platform DTs were fixed, this and the
-	 * above "dbi_base2" setting should be removed.
-	 */
-	if (device_property_match_string(dev, "reg-names", "dbi2") >= 0)
-		pci->dbi_base2 = NULL;
-
 	if (imx_check_flag(imx_pcie, IMX_PCIE_FLAG_SUPPORT_64BIT))
 		dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
 
-- 
2.37.1