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Fri, 03 Jul 2020 02:26:33 -0700 (PDT) Subject: Re: [PATCH v3 3/4] dt-bindings: arm-smmu: add compatible string for Marvell Armada-AP806 SMMU-500 To: Robin Murphy , will@kernel.org, joro@8bytes.org, gregory.clement@bootlin.com, robh+dt@kernel.org, hannah@marvell.com Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, devicetree@vger.kernel.org, catalin.marinas@arm.com, nadavh@marvell.com, linux-arm-kernel@lists.infradead.org, mw@semihalf.com References: <20200702201633.22693-1-tn@semihalf.com> <20200702201633.22693-4-tn@semihalf.com> <3172ec21-d773-7fcb-f1ee-f557f72f20c5@arm.com> From: Tomasz Nowicki Message-ID: <972f5cbd-705b-e18a-7477-5f6922804361@semihalf.com> Date: Fri, 3 Jul 2020 11:26:32 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <3172ec21-d773-7fcb-f1ee-f557f72f20c5@arm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 03.07.2020 11:05, Robin Murphy wrote: > On 2020-07-02 21:16, Tomasz Nowicki wrote: >> Add specific compatible string for Marvell usage due to errata of >> accessing 64bits registers of ARM SMMU, in AP806. >> >> AP806 SoC uses the generic ARM-MMU500, and there's no specific >> implementation of Marvell, this compatible is used for errata only. >> >> Signed-off-by: Hanna Hawa >> Signed-off-by: Gregory CLEMENT >> Signed-off-by: Tomasz Nowicki >> --- >>   Documentation/devicetree/bindings/iommu/arm,smmu.yaml | 5 +++++ >>   1 file changed, 5 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml >> b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml >> index d7ceb4c34423..7beca9c00b12 100644 >> --- a/Documentation/devicetree/bindings/iommu/arm,smmu.yaml >> +++ b/Documentation/devicetree/bindings/iommu/arm,smmu.yaml >> @@ -38,6 +38,11 @@ properties: >>                 - qcom,sc7180-smmu-500 >>                 - qcom,sdm845-smmu-500 >>             - const: arm,mmu-500 >> +      - description: Marvell SoCs implementing "arm,mmu-500" >> +        items: >> +          - enum: >> +              - marvell,ap806-smmu-500 > > Isn't a single-valued enum just a constant? :P That's how copy-paste engineering ends up :) Thanks, Tomasz