linux-kernel - RE: [PATCH 6/7] arm64: tegra: Add DT node for T194 SMMU

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Message-ID: <BYAPR12MB27102584FA929CBD92002DD9B3BD0@BYAPR12MB2710.namprd12.prod.outlook.com>
Date:   Fri, 30 Aug 2019 18:39:56 +0000
From:   Krishna Reddy <vdumpa@...dia.com>
To:     Mikko Perttunen <cyndis@...si.fi>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
        Thierry Reding <treding@...dia.com>,
        "Yu-Huan Hsu" <YHsu@...dia.com>, Sachin Nikam <Snikam@...dia.com>,
        Pritesh Raithatha <praithatha@...dia.com>,
        Timo Alho <talho@...dia.com>,
        Alexander Van Brunt <avanbrunt@...dia.com>,
        "Thomas Zeng (SW-TEGRA)" <thomasz@...dia.com>,
        "olof@...om.net" <olof@...om.net>,
        Juha Tukkinen <jtukkinen@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        "will.deacon@....com" <will.deacon@....com>,
        "joro@...tes.org" <joro@...tes.org>
Subject: RE: [PATCH 6/7] arm64: tegra: Add DT node for T194 SMMU

>> +	smmu: iommu@...00000 {
>> +		compatible = "nvidia,smmu-v2";

>Should we have a compatibility string like "nvidia,tegra194-smmu" so that we can have other chips with SMMUv2 that could be different?

As pointed by Robin as well, as Nvidia hasn't modified ARM MMU-500 implementation, we can update it to specific chip based. 
Let me update.

-KR