Commit 96a3be43 authored by Niklas Cassel's avatar Niklas Cassel Committed by Lorenzo Pieralisi
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PCI: designware-ep: Make dw_pcie_ep_reset_bar() handle 64-bit BARs properly 



Since a 64-bit BAR consists of a BAR pair, we need to write to both
BARs in the BAR pair to clear the BAR properly.

Signed-off-by: default avatarNiklas Cassel <niklas.cassel@axis.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: default avatarGustavo Pimentel <gustavo.pimentel@synopsys.com>
Acked-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
parent 6474a4e5

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

+4 −0
Original line number Original line Diff line number Diff line
@@ -28,6 +28,10 @@ static void __dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar, 
	dw_pcie_dbi_ro_wr_en(pci);

	dw_pcie_dbi_ro_wr_en(pci);

	dw_pcie_writel_dbi2(pci, reg, 0x0);

	dw_pcie_writel_dbi2(pci, reg, 0x0);

	dw_pcie_writel_dbi(pci, reg, 0x0);

	dw_pcie_writel_dbi(pci, reg, 0x0);

	if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) {

		dw_pcie_writel_dbi2(pci, reg + 4, 0x0);

		dw_pcie_writel_dbi(pci, reg + 4, 0x0);

	}

	dw_pcie_dbi_ro_wr_dis(pci);

	dw_pcie_dbi_ro_wr_dis(pci);

}

}