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arm64: dts: juno: add ETR SMMU power domain

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It is not at all clear from the documentation, but straightforward to
determine in practice, that the ETR SMMU is actually in the DEBUGSYS
power domain. Add that to the DT so that anyone brave enough to enable
said SMMU doesn't experience a system lockup on boot, especially a
sneaky one which goes away as soon as you connect an external debugger
to have a look at where it's stuck (thus powering up DEBUGSYS by other
means and allowing it to make progress again before actually halting...)

Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Robin Murphy 2017-01-18 12:12:51 +00:00 committed by Sudeep Holla
parent 193d00a2b3
commit fd47c2062a
1 changed files with 1 additions and 0 deletions
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arch/arm64/boot/dts/arm/juno-base.dtsi
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@ -52,6 +52,7 @@ smmu_etr: iommu@2b600000 {
#iommu-cells = <1>;
#global-interrupts = <1>;
dma-coherent;
power-domains = <&scpi_devpd 0>;
status = "disabled";
};