linux-kernel - Re: [PATCH v3] dt-bindings: iommu: qcom

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Message-Id: <176400331869.702885.5460533582186170525.b4-ty@kernel.org>
Date: Mon, 24 Nov 2025 19:18:32 +0000
From: Will Deacon <will@...nel.org>
To: Joerg Roedel <joro@...tes.org>,
	Robin Murphy <robin.murphy@....com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>
Cc: catalin.marinas@....com,
	kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	linux-arm-msm@...r.kernel.org,
	iommu@...ts.linux.dev,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] dt-bindings: iommu: qcom_iommu: Allow 'tbu' clock

On Tue, 04 Nov 2025 15:47:26 +0100, Konrad Dybcio wrote:
> Some IOMMUs on some platforms (there doesn't seem to be a good denominator
> for this) require the presence of a third clock, specifically relating
> to the instance's Translation Buffer Unit (TBU).
> 
> Stephan Gerhold noted [1] that according to Qualcomm Snapdragon 410E
> Processor (APQ8016E) Technical Reference Manual, SMMU chapter, section
> "8.8.3.1.2 Clock gating", which reads:
> 
> [...]

Applied to iommu (arm/smmu/bindings), thanks!

[1/1] dt-bindings: iommu: qcom_iommu: Allow 'tbu' clock
      https://git.kernel.org/iommu/c/fe6262910cd3

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
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