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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: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Niklas Cassel 2018-03-28 13:50:16 +02:00 committed by Lorenzo Pieralisi
parent 6474a4e554
commit 96a3be4326
1 changed files with 4 additions and 0 deletions
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4
drivers/pci/dwc/pcie-designware-ep.c
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@ -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_writel_dbi2(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);
}