linux-kernel - Re: [PATCH] clk: mvebu: armada-37xx-periph: Fix initialization for cpu clocks

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Message-ID: <20190522070341.GA32613@apalos>
Date:   Wed, 22 May 2019 10:03:41 +0300
From:   Ilias Apalodimas <ilias.apalodimas@...aro.org>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Gregory CLEMENT <gregory.clement@...tlin.com>,
        Christian Neubert <christian.neubert.86@...il.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Mike Turquette <mturquette@...libre.com>,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Rafael J. Wysocki" <rjw@...ysocki.net>, linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        linux-arm-kernel@...ts.infradead.org,
        Antoine Tenart <antoine.tenart@...tlin.com>,
        Miquèl Raynal <miquel.raynal@...tlin.com>,
        Maxime Chevallier <maxime.chevallier@...tlin.com>,
        stable@...r.kernel.org
Subject: Re: [PATCH] clk: mvebu: armada-37xx-periph: Fix initialization for
 cpu clocks

Hi Viresh, Gregory
On Mon, May 20, 2019 at 04:50:42PM +0530, Viresh Kumar wrote:
> On 25-04-19, 15:33, Ilias Apalodimas wrote:
> > Hi Viresh,
> > 
> > > > > Also, during this week-end, Christian suggested that the issue might
> > > > > come from the AVS support.
> > > > > 
> > > > > Could you disable it and check you still have the issue?
> > > > > 
> > > > > For this, you just have to remove the avs node in
> > > > > arch/arm64/boot/dts/marvell/armada-37xx.dtsi and rebuild the dtb.
> > > > Sure. You'll have to wait for a week though. Currently on a trip. I'll run that
> > > >  once i return
> > > 
> > > @Ilias: Can you please try this now and confirm to Gregory ?
> > I am more overloaded than usual and totally forgot about this. Apologies.
> > I'll try finding some time and do this.
> 
> Ping Ilias.
Sorry for the huge delay. 
Applying this patch and removing tha 'avs' node from
arch/arm64/boot/dts/marvell/armada-37xx.dtsi seems to work.
Changing between governors does not freeze the board any more. I haven't checked
the actual impact on the CPU speed but the values on 
/sys/devices/system/cpu/cpufreq/policy0/scaling_governor are correct

Cheers
/Ilias