linux-kernel - Re: [PATCH mvebu v2 00/10] Armada 37xx: Fix cpufreq changing base CPU speed to 800 MHz from 1000 MHz

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Message-Id: <675b7a74-066b-4dc0-8dcb-f11c5606ae52@www.fastmail.com>
Date:   Mon, 15 Feb 2021 21:48:08 -0800
From:   nnet <nnet@...tmail.fm>
To:     Pali Rohár <pali@...nel.org>
Cc:     Marek Behún <kabel@...nel.org>,
        a.heider@...il.com, andrew@...n.ch, gerald@....net,
        gregory.clement@...tlin.com, kostap@...vell.com,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, luka.perkov@...tura.hr,
        miquel.raynal@...tlin.com, mturquette@...libre.com,
        rmk+kernel@...linux.org.uk, sboyd@...nel.org, tmn505@...il.com,
        vladimir.vid@...tura.hr
Subject: Re: [PATCH mvebu v2 00/10] Armada 37xx: Fix cpufreq changing base CPU speed to 800 MHz from 1000 MHz

> Could you test following change instead of PATCH 04/10? I added here also
> logic for 1.2 GHz variant with 1.132 V value another change is that
> value for load L0 is not touched as it is stable.

These changes to patch 04/10 worked going 600 MHz <-> 1.2 GHz , _but_ only with:

++#define MIN_VOLT_MV_FOR_L1_1200MHZ 1213

During this latest testing I saw freezes with 1132 mV.

I've had no lockups with 1213 mV which I just used from the values for L1/L0 from OTP.

I only tested with those two values.