Re: [PATCH mvebu v3 00/10] Armada 37xx: Fix cpufreq changing base CPU speed to 800 MHz from 1000 MHz

From: Gregory CLEMENT <gregory.clement@bootlin.com>
To: "Pali Rohár" <pali@kernel.org>
Cc: "Andrew Lunn" <andrew@lunn.ch>,
	"Michael Turquette" <mturquette@baylibre.com>,
	"Stephen Boyd" <sboyd@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
	"Marek Behún" <kabel@kernel.org>,
	"Miquel Raynal" <miquel.raynal@bootlin.com>,
	"Tomasz Maciej Nowak" <tmn505@gmail.com>,
	"Luka Perkov" <luka.perkov@sartura.hr>,
	"Andre Heider" <a.heider@gmail.com>,
	"Vladimir Vid" <vladimir.vid@sartura.hr>,
	"Russell King" <rmk+kernel@armlinux.org.uk>,
	"Gérald Kerma" <gerald@gk2.net>,
	"Konstantin Porotchkin" <kostap@marvell.com>
Subject: Re: [PATCH mvebu v3 00/10] Armada 37xx: Fix cpufreq changing base CPU speed to 800 MHz from 1000 MHz
Date: Fri, 12 Mar 2021 10:12:06 +0100	[thread overview]
Message-ID: <87a6r8ka6x.fsf@BL-laptop> (raw)
In-Reply-To: <20210301192024.tgvp6f5zscbknepo@pali>

Hello Pali,

> Hello Gregory!
>
> Patches are the for almost two months and more people have tested them.
> They are marked with Fixed/CC-stable tags, they should go also into
> stable trees as they are fixing CPU scaling and instability issues.
>
> Are there any issues with these patches? If not, could you please merge
> them for upcoming Linux version?

Actually I am not the maintainer of the clk and cpufreq subsystems, so
the only thing I can apply is the device tree relative patch.

Gregory

>
> On Monday 22 February 2021 20:41:48 Pali Rohár wrote:
>> Hello!
>> 
>> This is third version of patches for Armada 37xx cpufreq driver which
>> fix CPU scaling with 1 GHz base frequency.
>> 
>> The only change in this third version is modified patch 04/10 with fixes
>> for 1.2 GHz variant of Espressobin. Minimal CPU voltage in L1 load for
>> 1.2 GHz variant was increased to 1.155V.
>> 
>> Patches are now rebased on top of the kernel version 5.11 with all
>> collected Acked-by/Tested-by lines and are available also in my git
>> tree in branch a3720-cpufreq-issues:
>> 
>> https://git.kernel.org/pub/scm/linux/kernel/git/pali/linux.git/log/?h=a3720-cpufreq-issues
>> 
>> If you have other Armada 3720 boards with 1.2 GHz CPU, including
>> Espressobin V7, let us know if it is working fine for you.
>> 
>> Marek & Pali
>> 
>> Marek Behún (3):
>>   arm64: dts: marvell: armada-37xx: add syscon compatible to NB clk node
>>   cpufreq: armada-37xx: Fix setting TBG parent for load levels
>>   clk: mvebu: armada-37xx-periph: remove .set_parent method for CPU PM
>>     clock
>> 
>> Pali Rohár (7):
>>   cpufreq: armada-37xx: Fix the AVS value for load L1
>>   clk: mvebu: armada-37xx-periph: Fix switching CPU freq from 250 Mhz to
>>     1 GHz
>>   clk: mvebu: armada-37xx-periph: Fix workaround for switching from L1
>>     to L0
>>   cpufreq: armada-37xx: Fix driver cleanup when registration failed
>>   cpufreq: armada-37xx: Fix determining base CPU frequency
>>   cpufreq: armada-37xx: Remove cur_frequency variable
>>   cpufreq: armada-37xx: Fix module unloading
>> 
>>  arch/arm64/boot/dts/marvell/armada-37xx.dtsi |   3 +-
>>  drivers/clk/mvebu/armada-37xx-periph.c       |  83 +++++++-------
>>  drivers/cpufreq/armada-37xx-cpufreq.c        | 111 +++++++++++++++----
>>  3 files changed, 135 insertions(+), 62 deletions(-)
>> 
>> -- 
>> 2.20.1
>> 

-- 
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com

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