linux-kernel - [PATCH PATCH RFC NOT TESTED 2/2] PCI: dra7xx: Use use_parent_dt_ranges and clean up dra7xx_pcie_cpu_addr

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Message-Id: <20250305-dra-v1-2-8dc6d9a0e1c0@nxp.com>
Date: Wed, 05 Mar 2025 11:20:23 -0500
From: Frank Li <Frank.Li@....com>
To: Tony Lindgren <tony@...mide.com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Vignesh Raghavendra <vigneshr@...com>, 
 Siddharth Vadapalli <s-vadapalli@...com>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kw@...ux.com>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Bjorn Helgaas <bhelgaas@...gle.com>
Cc: linux-omap@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, Frank Li <Frank.Li@....com>
Subject: [PATCH PATCH RFC NOT TESTED 2/2] PCI: dra7xx: Use
 use_parent_dt_ranges and clean up dra7xx_pcie_cpu_addr_fixup()

Remove dra7xx_pcie_cpu_addr_fixup() as the DT bus fabric should provide correct
address translation. Set use_parent_dt_ranges to allow the DWC core driver to
fetch address translation from the device tree

Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/pci/controller/dwc/pci-dra7xx.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index 33d6bf460ffe5..d6e0bf67a07b3 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -72,7 +72,6 @@
 
 #define	PCIECTRL_DRA7XX_CONF_PHY_CS			0x010C
 #define	LINK_UP						BIT(16)
-#define	DRA7XX_CPU_TO_BUS_ADDR				0x0FFFFFFF
 
 #define	PCIECTRL_TI_CONF_INTX_ASSERT			0x0124
 #define	PCIECTRL_TI_CONF_INTX_DEASSERT			0x0128
@@ -113,11 +112,6 @@ static inline void dra7xx_pcie_writel(struct dra7xx_pcie *pcie, u32 offset,
 	writel(value, pcie->base + offset);
 }
 
-static u64 dra7xx_pcie_cpu_addr_fixup(struct dw_pcie *pci, u64 cpu_addr)
-{
-	return cpu_addr & DRA7XX_CPU_TO_BUS_ADDR;
-}
-
 static int dra7xx_pcie_link_up(struct dw_pcie *pci)
 {
 	struct dra7xx_pcie *dra7xx = to_dra7xx_pcie(pci);
@@ -514,7 +508,6 @@ static int dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
 }
 
 static const struct dw_pcie_ops dw_pcie_ops = {
-	.cpu_addr_fixup = dra7xx_pcie_cpu_addr_fixup,
 	.start_link = dra7xx_pcie_establish_link,
 	.stop_link = dra7xx_pcie_stop_link,
 	.link_up = dra7xx_pcie_link_up,
@@ -712,6 +705,7 @@ static int dra7xx_pcie_probe(struct platform_device *pdev)
 
 	pci->dev = dev;
 	pci->ops = &dw_pcie_ops;
+	pci->use_parent_dt_ranges = true;
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)

-- 
2.34.1