From: Stephen Warren <swarren@wwwdotorg.org>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: rjw@sisk.pl, swarren@nvidia.com, linaro-kernel@lists.linaro.org,
patches@linaro.org, cpufreq@vger.kernel.org,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
mturquette@linaro.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 5/6] ARM: Tegra: start using cpufreq-cpu0 driver
Date: Wed, 07 Aug 2013 12:51:34 -0600 [thread overview]
Message-ID: <52029736.8040007@wwwdotorg.org> (raw)
In-Reply-To: <CAKohpom3o1y+xXof3iKCn6SWxYKNAE=aBGO2P3JF+Y0Ce4GmQQ@mail.gmail.com>
On 08/07/2013 11:59 AM, Viresh Kumar wrote:
> On 7 August 2013 23:23, Stephen Warren <swarren@wwwdotorg.org> wrote:
>> That link only describes why we shouldn't have a dedicated compatible
>> value for cpufreq. I certainly agree with that. However, I think it's
>> reasonable that whatever code binds to:
>>
>> compatible = "arm,cortex-a9";
>>
>> ... should instantiate any virtual devices that relate to the CPU.
>
> But how would we know here if platform really wants us to probe
> cpufreq-cpu0 driver? On multiplatform kernel there can be multiple
> cpufreq drivers available and there has to be some sort of code
> in DT or platform code that reflects which driver we want to use.
Presumably the code would look at the top-level DT node's compatible
value (e.g. "nvidia,tegra20").
WARNING: multiple messages have this Message-ID (diff)
From: swarren@wwwdotorg.org (Stephen Warren)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 5/6] ARM: Tegra: start using cpufreq-cpu0 driver
Date: Wed, 07 Aug 2013 12:51:34 -0600 [thread overview]
Message-ID: <52029736.8040007@wwwdotorg.org> (raw)
In-Reply-To: <CAKohpom3o1y+xXof3iKCn6SWxYKNAE=aBGO2P3JF+Y0Ce4GmQQ@mail.gmail.com>
On 08/07/2013 11:59 AM, Viresh Kumar wrote:
> On 7 August 2013 23:23, Stephen Warren <swarren@wwwdotorg.org> wrote:
>> That link only describes why we shouldn't have a dedicated compatible
>> value for cpufreq. I certainly agree with that. However, I think it's
>> reasonable that whatever code binds to:
>>
>> compatible = "arm,cortex-a9";
>>
>> ... should instantiate any virtual devices that relate to the CPU.
>
> But how would we know here if platform really wants us to probe
> cpufreq-cpu0 driver? On multiplatform kernel there can be multiple
> cpufreq drivers available and there has to be some sort of code
> in DT or platform code that reflects which driver we want to use.
Presumably the code would look at the top-level DT node's compatible
value (e.g. "nvidia,tegra20").
next prev parent reply other threads:[~2013-08-07 18:51 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-07 14:46 [PATCH 0/6] Tegra: Use cpufreq-cpu0 driver Viresh Kumar
2013-08-07 14:46 ` Viresh Kumar
2013-08-07 14:46 ` [PATCH 1/6] clk: Tegra: Add CPU0 clock driver Viresh Kumar
2013-08-07 14:46 ` Viresh Kumar
2013-08-07 16:44 ` Mike Turquette
2013-08-07 16:44 ` Mike Turquette
2013-08-07 16:44 ` Mike Turquette
2013-08-07 17:38 ` Stephen Warren
2013-08-07 17:38 ` Stephen Warren
2013-08-07 17:45 ` Viresh Kumar
2013-08-07 17:45 ` Viresh Kumar
2013-08-07 17:48 ` Stephen Warren
2013-08-07 17:48 ` Stephen Warren
2013-08-07 17:54 ` Viresh Kumar
2013-08-07 17:54 ` Viresh Kumar
2013-08-07 18:50 ` Stephen Warren
2013-08-07 18:50 ` Stephen Warren
2013-08-08 2:42 ` Viresh Kumar
2013-08-08 2:42 ` Viresh Kumar
2013-08-08 18:50 ` Stephen Warren
2013-08-08 18:50 ` Stephen Warren
2013-08-09 3:19 ` Viresh Kumar
2013-08-09 3:19 ` Viresh Kumar
2013-08-07 14:46 ` [PATCH 2/6] ARM: Tegra: Add CPU's OPPs for using cpufreq-cpu0 driver Viresh Kumar
2013-08-07 14:46 ` Viresh Kumar
2013-08-07 17:42 ` Stephen Warren
2013-08-07 17:42 ` Stephen Warren
2013-08-07 18:06 ` Viresh Kumar
2013-08-07 18:06 ` Viresh Kumar
2013-08-07 18:55 ` Stephen Warren
2013-08-07 18:55 ` Stephen Warren
2013-08-08 2:57 ` Viresh Kumar
2013-08-08 2:57 ` Viresh Kumar
2013-08-08 18:55 ` Stephen Warren
2013-08-08 18:55 ` Stephen Warren
2013-08-08 13:58 ` Lucas Stach
2013-08-08 13:58 ` Lucas Stach
2013-08-08 13:58 ` Lucas Stach
2013-08-08 14:11 ` Viresh Kumar
2013-08-08 14:11 ` Viresh Kumar
2013-08-08 14:22 ` Lucas Stach
2013-08-08 14:22 ` Lucas Stach
2013-08-08 14:37 ` Viresh Kumar
2013-08-08 14:37 ` Viresh Kumar
2013-08-08 15:52 ` Nishanth Menon
2013-08-08 15:52 ` Nishanth Menon
2013-08-08 15:52 ` Nishanth Menon
2013-08-07 14:46 ` [PATCH 3/6] ARM: Tegra: Enable OPP library Viresh Kumar
2013-08-07 14:46 ` Viresh Kumar
2013-08-07 17:43 ` Stephen Warren
2013-08-07 17:43 ` Stephen Warren
2013-08-07 18:08 ` Viresh Kumar
2013-08-07 18:08 ` Viresh Kumar
2013-08-07 14:46 ` [PATCH 4/6] ARM: Tegra: defconfig: select cpufreq-cpu0 driver Viresh Kumar
2013-08-07 14:46 ` Viresh Kumar
2013-08-07 14:46 ` [PATCH 5/6] ARM: Tegra: start using " Viresh Kumar
2013-08-07 14:46 ` Viresh Kumar
2013-08-07 17:46 ` Stephen Warren
2013-08-07 17:46 ` Stephen Warren
2013-08-07 17:49 ` Viresh Kumar
2013-08-07 17:49 ` Viresh Kumar
2013-08-07 17:53 ` Stephen Warren
2013-08-07 17:53 ` Stephen Warren
2013-08-07 17:59 ` Viresh Kumar
2013-08-07 17:59 ` Viresh Kumar
2013-08-07 18:51 ` Stephen Warren [this message]
2013-08-07 18:51 ` Stephen Warren
2013-08-08 2:48 ` Viresh Kumar
2013-08-08 2:48 ` Viresh Kumar
2013-08-07 14:46 ` [PATCH 6/6] cpufreq: Tegra: Remove tegra-cpufreq driver Viresh Kumar
2013-08-07 14:46 ` Viresh Kumar
2013-08-08 8:31 ` [PATCH 0/6] Tegra: Use cpufreq-cpu0 driver Richard Zhao
2013-08-08 8:31 ` Richard Zhao
2013-08-08 8:33 ` Viresh Kumar
2013-08-08 8:33 ` Viresh Kumar
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