linux-kernel - [PATCH V3 07/16] dt-bindings: PCI: designware: Add binding for CDM register check

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Date:   Wed, 17 Apr 2019 00:57:21 +0530
From:   Vidya Sagar <vidyas@...dia.com>
To:     <bhelgaas@...gle.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <thierry.reding@...il.com>,
        <jonathanh@...dia.com>, <kishon@...com>, <catalin.marinas@....com>,
        <will.deacon@....com>, <lorenzo.pieralisi@....com>,
        <jingoohan1@...il.com>, <gustavo.pimentel@...opsys.com>
CC:     <mperttunen@...dia.com>, <linux-pci@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <kthota@...dia.com>,
        <mmaddireddy@...dia.com>, <vidyas@...dia.com>, <sagar.tv@...il.com>
Subject: [PATCH V3 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 <vidyas@...dia.com>
---
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 c124f9bc11f3..2b5f5e25a028 100644
--- a/Documentation/devicetree/bindings/pci/designware-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/designware-pcie.txt
@@ -31,6 +31,11 @@ Optional properties:
 - clock-names: Must include the following entries:
 	- "pcie"
 	- "pcie_bus"
+- 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