linux-kernel - Re: [PATCH] arm64: dts: qcom: sdm845-mtp: Mark protected gcc clocks

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Date:   Wed, 21 Nov 2018 23:30:43 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sdm845-mtp: Mark protected gcc clocks

On Wed 21 Nov 01:01 PST 2018, Stephen Boyd wrote:

> Quoting Bjorn Andersson (2018-11-05 21:50:13)
> > As of v4.20-rc1 probing the GCC driver on a SDM845 device with the
> > standard security implementation causes an access violation and an
> > immediate system restart. Use the protected-clocks property to mark the
> > offending clocks protected for the MTP, in order to allow it to boot.
> > 
> > Cc: Stephen Boyd <sboyd@...nel.org>
> > Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> > ---
> > 
> > This depends on the acceptance of
> > https://lore.kernel.org/lkml/20181105194011.43770-1-swboyd@chromium.org/
> 
> Do you need me to merge this into clk-fixes so that Andy can send this
> up for v4.20 final? I thought you may have other boot blocking issues so
> this wouldn't be a critical fix.
> 

We resolved the gpio-related issues, so iirc this is the only other item
preventing the MTP from booting. So yes please.

Unless you enable USB support, because configuring the first USB
controller in host currently crashes the device - I've not yet found the
cause for this though.

Regards,
Bjorn