linux-kernel - Re: [PATCH V6 06/15] dt-bindings: PCI: designware: Add binding for CDM register check

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Date:   Tue, 14 May 2019 10:57:04 +0530
From:   Vidya Sagar <vidyas@...dia.com>
To:     Rob Herring <robh@...nel.org>
CC:     <lorenzo.pieralisi@....com>, <bhelgaas@...gle.com>,
        <mark.rutland@....com>, <thierry.reding@...il.com>,
        <jonathanh@...dia.com>, <kishon@...com>, <catalin.marinas@....com>,
        <will.deacon@....com>, <jingoohan1@...il.com>,
        <gustavo.pimentel@...opsys.com>, <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>, <sagar.tv@...il.com>
Subject: Re: [PATCH V6 06/15] dt-bindings: PCI: designware: Add binding for
 CDM register check

On 5/13/2019 8:40 PM, Rob Herring wrote:
> On Mon, May 13, 2019 at 10:36:17AM +0530, Vidya Sagar wrote:
>> 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 [v5]:
>> * None
>>
>> Changes since [v4]:
>> * None
>>
>> Changes since [v3]:
>> * None
>>
>> 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
>> --- 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"
>> +- 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.
> 
> snps,enable-cdm-check
Ok. Done.

> 
>>   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
>>