From: Sudeep Holla <sudeep.holla@arm.com>
To: Daniel Lezcano <daniel.lezcano@linaro.org>, rjw@rjwysocki.net
Cc: Sudeep Holla <sudeep.holla@arm.com>,
linux-pm@vger.kernel.org,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Leo Yan <leo.yan@linaro.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] ARM: cpuidle: Support asymmetric idle definition
Date: Tue, 13 Jun 2017 10:46:00 +0100 [thread overview]
Message-ID: <1ce6e228-39cf-a8be-ff65-a5fdf5e78605@arm.com> (raw)
In-Reply-To: <1497282910-19085-2-git-send-email-daniel.lezcano@linaro.org>
Hi Daniel,
On 12/06/17 16:55, Daniel Lezcano wrote:
> Some hardware have clusters with different idle states. The current code does
> not support this and fails as it expects all the idle states to be identical.
>
> Because of this, the Mediatek mtk8173 had to create the same idle state for a
> big.Little system and now the Hisilicon 960 is facing the same situation.
>
> Solve this by simply assuming the multiple driver will be needed for all the
> platforms using the ARM generic cpuidle driver which makes sense because of the
> different topologies we can support with a single kernel for ARM32 or ARM64.
>
> Every CPU has its own driver, so every single CPU can specify in the DT the
> idle states.
>
> This simple approach allows to support the future dynamIQ system, current SMP
> and HMP.
>
> Tested on:
> - 96boards: Hikey 620
> - 96boards: Hikey 960
> - 96boards: dragonboard410c
> - Mediatek 8173
>
> Cc: Sudeep Holla <sudeep.holla@arm.com>
Sorry for the delay, as I mentioned earlier I would like to add the
minimum change to avoid this on platforms that don't require this. But
that can be done later, I will try to come up with simple solution when
I get time. Though I am not 100% happy ;), I am fine with this change
for now:
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
--
Regards,
Sudeep
next prev parent reply other threads:[~2017-06-13 9:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20170612155441.GE2261@mai>
2017-06-12 15:55 ` [PATCH 1/2] cpuidle: dt: Add missing 'of_node_put()' Daniel Lezcano
2017-06-12 15:55 ` [PATCH 2/2] ARM: cpuidle: Support asymmetric idle definition Daniel Lezcano
2017-06-12 18:49 ` Rafael J. Wysocki
2017-06-12 19:17 ` Daniel Lezcano
2017-06-22 12:25 ` Daniel Lezcano
2017-06-22 14:27 ` Rafael J. Wysocki
2017-06-13 9:46 ` Sudeep Holla [this message]
2017-06-12 16:42 ` [PATCH 1/2] cpuidle: dt: Add missing 'of_node_put()' Lorenzo Pieralisi
2017-06-12 18:46 ` Rafael J. Wysocki
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1ce6e228-39cf-a8be-ff65-a5fdf5e78605@arm.com \
--to=sudeep.holla@arm.com \
--cc=daniel.lezcano@linaro.org \
--cc=leo.yan@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=lorenzo.pieralisi@arm.com \
--cc=rjw@rjwysocki.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).