| Date | Wed, 10 Nov 2021 09:40:16 +0100 | From | Stephan Gerhold <> | Subject | Re: [PATCH AUTOSEL 5.15 73/82] arm64: dts: qcom: msm8916: Add CPU ACC and SAW/SPM |
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Hi Sasha,
On Tue, Nov 09, 2021 at 05:16:31PM -0500, Sasha Levin wrote: > From: Stephan Gerhold <stephan@gerhold.net> > > [ Upstream commit a22f9a766e1dc61f8f6ee2edfe83d4d23d78e059 ] > > Add the device tree nodes necessary for SMP bring-up and cpuidle > without PSCI on ARM32. The hardware is typically controlled by the > PSCI implementation in the TrustZone firmware and is therefore marked > as status = "reserved" by default (from the device tree specification): > > "Indicates that the device is operational, but should not be used. > Typically this is used for devices that are controlled by another > software component, such as platform firmware." > > Since this is part of the MSM8916 SoC it should be added to msm8916.dtsi > but in practice these nodes should only get enabled via an extra include > on ARM32. > > This is necessary for some devices with signed firmware which is missing > both ARM64 and PSCI support and can therefore only boot ARM32 kernels. > > Signed-off-by: Stephan Gerhold <stephan@gerhold.net> > Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> > Link: https://lore.kernel.org/r/20211004204955.21077-13-stephan@gerhold.net > Signed-off-by: Sasha Levin <sashal@kernel.org> >
This patch is not useful without other changes that landed in 5.16 (in particular, the new device actually making use of these nodes).
Can you drop this patch?
Thanks, Stephan
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