Commit d565d60d authored Dec 22, 2022 by Krzysztof Kozlowski Committed by Will Deacon Jan 24, 2023

dt-bindings: arm-smmu: disallow clocks when not used



Disallow clocks for variants other than:
1. SMMUs with platform-specific compatibles which list explicit clocks
   and clock-names,
2. SMMUs using only generic compatibles, e.g. arm,mmu-500, which have a
   variable clocks on different implementations.

This requires such variants with platform-specific compatible, to
explicitly list the clocks or omit them, making the binding more
constraint.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20221222092355.74586-1-krzysztof.kozlowski@linaro.org


Signed-off-by: Will Deacon <will@kernel.org>

parent 6dbffe46

Documentation/devicetree/bindings/iommu/arm,smmu.yaml

+28 −0

Original line number	Diff line number	Diff line
		@@ -368,6 +368,34 @@ allOf:
		- description: interface clock required to access smmu's registers
		through the TCU's programming interface.

		# Disallow clocks for all other platforms with specific compatibles
		- if:
		properties:
		compatible:
		contains:
		enum:
		- cavium,smmu-v2
		- marvell,ap806-smmu-500
		- nvidia,smmu-500
		- qcom,qcm2290-smmu-500
		- qcom,qdu1000-smmu-500
		- qcom,sc7180-smmu-500
		- qcom,sc8180x-smmu-500
		- qcom,sc8280xp-smmu-500
		- qcom,sdm670-smmu-500
		- qcom,sdm845-smmu-500
		- qcom,sdx55-smmu-500
		- qcom,sdx65-smmu-500
		- qcom,sm6115-smmu-500
		- qcom,sm6350-smmu-500
		- qcom,sm6375-smmu-500
		- qcom,sm8350-smmu-500
		- qcom,sm8450-smmu-500
		then:
		properties:
		clock-names: false
		clocks: false

		- if:
		properties:
		compatible: