From: Sudeep Holla <sudeep.holla@arm.com>
To: Sujeet Kumar Baranwal <sbaranwal@marvell.com>
Cc: linux-arm-kernel@lists.infradead.org,
Sudeep Holla <sudeep.holla@arm.com>
Subject: Re: SCMI & Devfreq
Date: Fri, 13 Sep 2019 11:23:04 +0100 [thread overview]
Message-ID: <20190913102304.GC2559@bogus> (raw)
In-Reply-To: <BYAPR18MB24387C9DDE32067F1763B6DEAFB00@BYAPR18MB2438.namprd18.prod.outlook.com>
On Thu, Sep 12, 2019 at 06:55:36PM +0000, Sujeet Kumar Baranwal wrote:
> Hi,
>
> I am a recent adopter of SCMI protocol on marvell processors and has been
> able to use cpufreq governor using scmi-cpufreq frame work to change CPU
> frequency.
>
Good, but just a quick question to check if this is ACPI or DT based
platform ? That matter a lot to answer you query.
> While SCMI_PERFORMANCE_PROTOCL allows multiple "domains" to be created, each
> domain representing one clock with several OPPs, it works well.
OK
> For sysfs command like "cat > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor".
I don't understand the context of above statement.
> I am trying to find how SCMI could help in similar facilities when it comes
> to devfreq for device specific OPP variation.
Yes it needs some work and I do have some prototype, but with no users
in the upstream, I haven't added it yet.
> If someone did similar work done or doing, please enlighten me too.
>
What kind of devices are these ? There was some work around generic
devfreq driver that I had seen on the list and my plan was to do something
similar, I need to dig up details as it was while ago.
--
Regards,
Sudeep
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next parent reply other threads:[~2019-09-13 10:23 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <BYAPR18MB24387C9DDE32067F1763B6DEAFB00@BYAPR18MB2438.namprd18.prod.outlook.com>
2019-09-13 10:23 ` Sudeep Holla [this message]
2019-09-16 5:22 ` [EXT] Re: SCMI & Devfreq Sujeet Kumar Baranwal
2019-09-16 10:15 ` Sudeep Holla
2019-09-16 17:36 ` Sujeet Kumar Baranwal
2019-09-18 22:53 ` Sujeet Kumar Baranwal
2019-09-19 15:23 ` Sudeep Holla
2019-10-07 18:20 ` Sujeet Kumar Baranwal
2019-10-14 16:58 ` Sudeep Holla
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