Add support to enable CDM (Configuration Dependent Module) registers check for any data corruption. CDM registers include standard PCIe configuration space registers, Port Logic registers and iATU and DMA registers. Refer Section S.4 of Synopsys DesignWare Cores PCI Express Controller Databook Version 4.90a. Signed-off-by: Vidya Sagar <vidyas@xxxxxxxxxx> Reviewed-by: Thierry Reding <treding@xxxxxxxxxx> Reviewed-by: Rob Herring <robh@xxxxxxxxxx> --- V14: * Added a full stop(.) at the end of commit message. V13: * None V12: * None V11: * None V10: * None V9: * None V8: * None V7: * Changed "enable-cdm-check" to "snps,enable-cdm-check" V6: * None V5: * None V4: * None V3: * Changed flag name from 'cdm-check' to 'enable-cdm-check' * Added info about Port Logic and DMA registers being part of CDM V2: * This is a new patch in v2 series Documentation/devicetree/bindings/pci/designware-pcie.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/designware-pcie.txt b/Documentation/devicetree/bindings/pci/designware-pcie.txt index 5561a1c060d0..3fba04da6a59 100644 --- a/Documentation/devicetree/bindings/pci/designware-pcie.txt +++ b/Documentation/devicetree/bindings/pci/designware-pcie.txt @@ -34,6 +34,11 @@ Optional properties: - clock-names: Must include the following entries: - "pcie" - "pcie_bus" +- snps,enable-cdm-check: This is a boolean property and if present enables + automatic checking of CDM (Configuration Dependent Module) registers + for data corruption. CDM registers include standard PCIe configuration + space registers, Port Logic registers, DMA and iATU (internal Address + Translation Unit) registers. RC mode: - num-viewport: number of view ports configured in hardware. If a platform does not specify it, the driver assumes 2. -- 2.17.1
