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Subject[PATCH V2 07/16] dt-bindings: PCI: designware: Add binding for CDM register check
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 <>
Changes since [v1]:
* This is a new patch in v2 series

Documentation/devicetree/bindings/pci/designware-pcie.txt | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/designware-pcie.txt b/Documentation/devicetree/bindings/pci/designware-pcie.txt
index c124f9bc11f3..728281b5bcd5 100644
--- a/Documentation/devicetree/bindings/pci/designware-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/designware-pcie.txt
@@ -31,6 +31,10 @@ Optional properties:
- clock-names: Must include the following entries:
- "pcie"
- "pcie_bus"
+- 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 configuration space registers 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.
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