linux-kernel - RE: [PATCH 2/7] dt-bindings: arm-smmu: Add binding for nvidia,smmu-v2

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Message-ID: <BYAPR12MB271012F225E35C1459E58D07B3BD0@BYAPR12MB2710.namprd12.prod.outlook.com>
Date:   Fri, 30 Aug 2019 18:12:08 +0000
From:   Krishna Reddy <vdumpa@...dia.com>
To:     Robin Murphy <robin.murphy@....com>
CC:     Sachin Nikam <Snikam@...dia.com>,
        "Thomas Zeng (SW-TEGRA)" <thomasz@...dia.com>,
        Juha Tukkinen <jtukkinen@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        Pritesh Raithatha <praithatha@...dia.com>,
        "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Timo Alho <talho@...dia.com>, Yu-Huan Hsu <YHsu@...dia.com>,
        "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
        Thierry Reding <treding@...dia.com>,
        Alexander Van Brunt <avanbrunt@...dia.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH 2/7] dt-bindings: arm-smmu: Add binding for nvidia,smmu-v2

>> +                        "nidia,smmu-v2"
>>                           "qcom,smmu-v2"

>I agree with Mikko that the compatible must be at least SoC-specific, but potentially even instance-specific (e.g. "nvidia,tegra194-gpu-smmu")
> depending on how many of these parallel-SMMU configurations might be hiding in current and future SoCs.

I am correcting the spelling mistake pointed by Mikko.  The NVIDIA SMMUv2 implementation is getting used beyond  Tegra194 SOC.  
To be able to use the smmu compatible string across multiple SOC's, "nvidia,smmu-v2" compatible string is chosen.
Are you suggesting to make it soc specific and add another one in future?

-KR