[PATCH V13 06/12] dt-bindings: PCI: designware: Add binding for CDM register check

[Vidya Sagar <vidyas@nvidia.com>]

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@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
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