linux-kernel - [PATCH 07/11] dt-bindings: iommu: qcom

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Date:   Tue, 27 Jun 2023 18:24:23 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     cros-qcom-dts-watchers@...omium.org,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Benjamin Li <benl@...areup.com>,
        James Willcox <jwillcox@...areup.com>,
        Joseph Gates <jgates@...areup.com>,
        Stephan Gerhold <stephan@...hold.net>,
        Zac Crosby <zac@...areup.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Banajit Goswami <bgoswami@...cinc.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, Lee Jones <lee@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Xu Yang <xu.yang_2@....com>, Peng Fan <peng.fan@....com>,
        Christian Marangi <ansuelsmth@...il.com>,
        Wesley Cheng <quic_wcheng@...cinc.com>,
        Jun Nie <jun.nie@...aro.org>, Max Chen <mchen@...areup.com>,
        Shawn Guo <shawn.guo@...aro.org>,
        Vivek Gautam <vivek.gautam@...eaurora.org>
Cc:     Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Vincent Knecht <vincent.knecht@...loo.org>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        alsa-devel@...a-project.org, iommu@...ts.linux.dev,
        linux-usb@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Leo Yan <leo.yan@...aro.org>, Rob Herring <robh@...nel.org>,
        Andy Gross <andy.gross@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH 07/11] dt-bindings: iommu: qcom_iommu: Allow 'tbu' clock

Some IOMMUs on some platforms (there doesn't seem to be a good denominator
for this) require the presence of a third clock, specifically for
accessing the IOMMU's Translation Buffer Unit (TBU). Allow it.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 Documentation/devicetree/bindings/iommu/qcom,iommu.yaml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/iommu/qcom,iommu.yaml b/Documentation/devicetree/bindings/iommu/qcom,iommu.yaml
index d9fabdf930d9..3b7acb459f8e 100644
--- a/Documentation/devicetree/bindings/iommu/qcom,iommu.yaml
+++ b/Documentation/devicetree/bindings/iommu/qcom,iommu.yaml
@@ -24,14 +24,18 @@ properties:
       - const: qcom,msm-iommu-v1
 
   clocks:
+    minItems: 2
     items:
       - description: Clock required for IOMMU register group access
       - description: Clock required for underlying bus access
+      - description: Clock required for Translation Buffer Unit access
 
   clock-names:
+    minItems: 2
     items:
       - const: iface
       - const: bus
+      - const: tbu
 
   power-domains:
     maxItems: 1

-- 
2.41.0