[PATCH V6 06/15] dt-bindings: PCI: designware: Add binding for CDM register check
From: Vidya Sagar
Date: Mon May 13 2019 - 01:09:04 EST
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
Signed-off-by: Vidya Sagar <vidyas@xxxxxxxxxx>
Changes since [v5]:
Changes since [v4]:
Changes since [v3]:
Changes since [v2]:
* Changed flag name from 'cdm-check' to 'enable-cdm-check'
* Added info about Port Logic and DMA registers being part of CDM
Changes since [v1]:
* 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..85b872c42a9f 100644
@@ -34,6 +34,11 @@ Optional properties:
- clock-names: Must include the following entries:
+- 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.
- num-viewport: number of view ports configured in hardware. If a platform
does not specify it, the driver assumes 2.