From: Geert Uytterhoeven <geert@linux-m68k.org>
To: linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH/RFC 4/5] ARM: shmobile: R-Mobile: Add DT support for PM domains
Date: Wed, 10 Sep 2014 12:40:57 +0000 [thread overview]
Message-ID: <CAMuHMdUcaGNQWmfS4U=XhksscuWh6hk8gA8fOpaUwxSmChDbiQ@mail.gmail.com> (raw)
In-Reply-To: <7h1trkkc49.fsf@deeprootsystems.com>
Hi Kevin,
On Tue, Sep 9, 2014 at 6:11 PM, Kevin Hilman <khilman@kernel.org> wrote:
>> +static int r8a7740_pd_a4s_suspend(void)
>> +{
>> + /*
>> + * The A4S domain contains the CPU core and therefore it should
>> + * only be turned off if the CPU is in use.
>> + */
>> + return -EBUSY;
>> +}
>
>
> Do you have plans to use pm_genpd_attach_cpuidle() for this eventually,
> maybe by checking if the enclosing node is a CPU? If not, are there
> other plans to handle idle for the power domains that contain CPUs?
Yes, the plan is to add more power saving features, and use DT topology
analysis to get rid of the hardcoded domain logic.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Kevin Hilman <khilman@kernel.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
Simon Horman <horms@verge.net.au>,
Magnus Damm <magnus.damm@gmail.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
Tomasz Figa <tomasz.figa@gmail.com>,
Philipp Zabel <philipp.zabel@gmail.com>,
Linux PM list <linux-pm@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Linux-sh list <linux-sh@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH/RFC 4/5] ARM: shmobile: R-Mobile: Add DT support for PM domains
Date: Wed, 10 Sep 2014 14:40:57 +0200 [thread overview]
Message-ID: <CAMuHMdUcaGNQWmfS4U=XhksscuWh6hk8gA8fOpaUwxSmChDbiQ@mail.gmail.com> (raw)
In-Reply-To: <7h1trkkc49.fsf@deeprootsystems.com>
Hi Kevin,
On Tue, Sep 9, 2014 at 6:11 PM, Kevin Hilman <khilman@kernel.org> wrote:
>> +static int r8a7740_pd_a4s_suspend(void)
>> +{
>> + /*
>> + * The A4S domain contains the CPU core and therefore it should
>> + * only be turned off if the CPU is in use.
>> + */
>> + return -EBUSY;
>> +}
>
>
> Do you have plans to use pm_genpd_attach_cpuidle() for this eventually,
> maybe by checking if the enclosing node is a CPU? If not, are there
> other plans to handle idle for the power domains that contain CPUs?
Yes, the plan is to add more power saving features, and use DT topology
analysis to get rid of the hardcoded domain logic.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Kevin Hilman <khilman@kernel.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
Simon Horman <horms@verge.net.au>,
Magnus Damm <magnus.damm@gmail.com>,
Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
Tomasz Figa <tomasz.figa@gmail.com>,
Philipp Zabel <philipp.zabel@gmail.com>,
Linux PM list <linux-pm@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Linux-sh list <linux-sh@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH/RFC 4/5] ARM: shmobile: R-Mobile: Add DT support for PM domains
Date: Wed, 10 Sep 2014 14:40:57 +0200 [thread overview]
Message-ID: <CAMuHMdUcaGNQWmfS4U=XhksscuWh6hk8gA8fOpaUwxSmChDbiQ@mail.gmail.com> (raw)
In-Reply-To: <7h1trkkc49.fsf@deeprootsystems.com>
Hi Kevin,
On Tue, Sep 9, 2014 at 6:11 PM, Kevin Hilman <khilman@kernel.org> wrote:
>> +static int r8a7740_pd_a4s_suspend(void)
>> +{
>> + /*
>> + * The A4S domain contains the CPU core and therefore it should
>> + * only be turned off if the CPU is in use.
>> + */
>> + return -EBUSY;
>> +}
>
>
> Do you have plans to use pm_genpd_attach_cpuidle() for this eventually,
> maybe by checking if the enclosing node is a CPU? If not, are there
> other plans to handle idle for the power domains that contain CPUs?
Yes, the plan is to add more power saving features, and use DT topology
analysis to get rid of the hardcoded domain logic.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
WARNING: multiple messages have this Message-ID (diff)
From: geert@linux-m68k.org (Geert Uytterhoeven)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH/RFC 4/5] ARM: shmobile: R-Mobile: Add DT support for PM domains
Date: Wed, 10 Sep 2014 14:40:57 +0200 [thread overview]
Message-ID: <CAMuHMdUcaGNQWmfS4U=XhksscuWh6hk8gA8fOpaUwxSmChDbiQ@mail.gmail.com> (raw)
In-Reply-To: <7h1trkkc49.fsf@deeprootsystems.com>
Hi Kevin,
On Tue, Sep 9, 2014 at 6:11 PM, Kevin Hilman <khilman@kernel.org> wrote:
>> +static int r8a7740_pd_a4s_suspend(void)
>> +{
>> + /*
>> + * The A4S domain contains the CPU core and therefore it should
>> + * only be turned off if the CPU is in use.
>> + */
>> + return -EBUSY;
>> +}
>
>
> Do you have plans to use pm_genpd_attach_cpuidle() for this eventually,
> maybe by checking if the enclosing node is a CPU? If not, are there
> other plans to handle idle for the power domains that contain CPUs?
Yes, the plan is to add more power saving features, and use DT topology
analysis to get rid of the hardcoded domain logic.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
next prev parent reply other threads:[~2014-09-10 12:40 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-08 13:35 [PATCH/RFC 0/5] ARM: shmobile: R-Mobile: Prototype DT PM domain support Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-08 13:35 ` [PATCH/RFC 1/5] PM / Domains: Add DT bindings for power-on/off latencies Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-09 15:57 ` Kevin Hilman
2014-09-09 15:57 ` Kevin Hilman
2014-09-09 15:57 ` Kevin Hilman
2014-09-08 13:35 ` [PATCH/RFC 2/5] PM / Domains: Add DT bindings for the R-Mobile System Controller Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-08 22:44 ` Khiem Nguyen
2014-09-08 22:44 ` Khiem Nguyen
2014-09-08 22:44 ` Khiem Nguyen
2014-09-09 7:16 ` Geert Uytterhoeven
2014-09-09 7:16 ` Geert Uytterhoeven
2014-09-09 7:16 ` Geert Uytterhoeven
2014-09-09 7:16 ` Geert Uytterhoeven
2014-09-08 13:35 ` [PATCH/RFC 3/5] ARM: shmobile: R-Mobile: Store SYSC base address in rmobile_pm_domain Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-08 13:35 ` [PATCH/RFC 4/5] ARM: shmobile: R-Mobile: Add DT support for PM domains Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-09 15:40 ` Kevin Hilman
2014-09-09 15:40 ` Kevin Hilman
2014-09-09 15:40 ` Kevin Hilman
2014-09-10 12:37 ` Geert Uytterhoeven
2014-09-10 12:37 ` Geert Uytterhoeven
2014-09-10 12:37 ` Geert Uytterhoeven
2014-09-10 12:37 ` Geert Uytterhoeven
2014-09-09 16:11 ` Kevin Hilman
2014-09-09 16:11 ` Kevin Hilman
2014-09-09 16:11 ` Kevin Hilman
2014-09-10 12:40 ` Geert Uytterhoeven [this message]
2014-09-10 12:40 ` Geert Uytterhoeven
2014-09-10 12:40 ` Geert Uytterhoeven
2014-09-10 12:40 ` Geert Uytterhoeven
2014-09-08 13:35 ` [PATCH/RFC 5/5] ARM: shmobile: r8a7740 dtsi: Add PM domain support Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
2014-09-08 13:35 ` Geert Uytterhoeven
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