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PCI: dwc: Add support to enable CDM register check

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Add support to enable CDM (Configuration Dependent Module) register
check for any data corruption based on the DT property
'snps,enable-cdm-check'.

Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Acked-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
This commit is contained in:
Vidya Sagar
2019-08-13 17:06:22 +05:30
committed by Lorenzo Pieralisi
parent f4e84a5d9d
commit 07f123def7
2 changed files with 16 additions and 0 deletions
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7
drivers/pci/controller/dwc/pcie-designware.c
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@@ -547,4 +547,11 @@ void dw_pcie_setup(struct dw_pcie *pci)
break;
}
dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
if (of_property_read_bool(np, "snps,enable-cdm-check")) {
val = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS);
val |= PCIE_PL_CHK_REG_CHK_REG_CONTINUOUS |
PCIE_PL_CHK_REG_CHK_REG_START;
dw_pcie_writel_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS, val);
}
}