linux-kernel - [PATCH RFT 2/2] PCI: dwc: visconti: Remove cpu_addr

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Message-Id: <20250613-tmpv-v1-2-4023aa386d17@nxp.com>
Date: Fri, 13 Jun 2025 17:33:30 -0400
From: Frank Li <Frank.Li@....com>
To: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@...hiba.co.jp>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kwilczynski@...nel.org>, 
 Manivannan Sadhasivam <mani@...nel.org>, 
 Bjorn Helgaas <bhelgaas@...gle.com>
Cc: linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org, 
 Frank Li <Frank.Li@....com>
Subject: [PATCH RFT 2/2] PCI: dwc: visconti: Remove cpu_addr_fix() after
 DTS fix ranges

Remove cpu_addr_fix() since it is no longer needed. The PCIe ranges
property has been corrected in the DTS, and the DesignWare common code now
handles address translation properly without requiring this workaround.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 drivers/pci/controller/dwc/pcie-visconti.c | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-visconti.c b/drivers/pci/controller/dwc/pcie-visconti.c
index cdeac6177143c..9c3386c965948 100644
--- a/drivers/pci/controller/dwc/pcie-visconti.c
+++ b/drivers/pci/controller/dwc/pcie-visconti.c
@@ -171,20 +171,7 @@ static void visconti_pcie_stop_link(struct dw_pcie *pci)
 	visconti_mpu_writel(pcie, val | MPU_MP_EN_DISABLE, PCIE_MPU_REG_MP_EN);
 }
 
-/*
- * In this SoC specification, the CPU bus outputs the offset value from
- * 0x40000000 to the PCIe bus, so 0x40000000 is subtracted from the CPU
- * bus address. This 0x40000000 is also based on io_base from DT.
- */
-static u64 visconti_pcie_cpu_addr_fixup(struct dw_pcie *pci, u64 cpu_addr)
-{
-	struct dw_pcie_rp *pp = &pci->pp;
-
-	return cpu_addr & ~pp->io_base;
-}
-
 static const struct dw_pcie_ops dw_pcie_ops = {
-	.cpu_addr_fixup = visconti_pcie_cpu_addr_fixup,
 	.link_up = visconti_pcie_link_up,
 	.start_link = visconti_pcie_start_link,
 	.stop_link = visconti_pcie_stop_link,

-- 
2.34.1