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From: Santosh Shilimkar <santosh.shilimkar-l0cyMroinI0@public.gmane.org>
To: Peter De Schrijver
	<pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: Colin Cross <ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org>,
	"linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>,
	"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
	<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
	Joseph Lo <josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH V3 1/5] ARM: tegra: add pending SGI checking API
Date: Thu, 20 Dec 2012 17:36:35 +0530	[thread overview]
Message-ID: <50D2FF4B.5010401@ti.com> (raw)
In-Reply-To: <20121220111409.GH19258-Rysk9IDjsxmJz7etNGeUX8VPkgjIgRvpAL8bYrjMMd8@public.gmane.org>

On Thursday 20 December 2012 04:44 PM, Peter De Schrijver wrote:
>>>
>>> So why does OMAP4 have working coupled idle without the SGI check then?
>>>
>> Because whenever the OMAP4 CPUs enter into any power states apart from
>> ON, clock-domain force wakeup method us being used to wakeup
>> secondary CPUs. And secondly CPU RET is not supported on purpose because
>> of some known IP block issues.
>>
>
> Aha. That explains indeed why you don't need the check.
>
Just for the information on OMAP5 SOC, CPU RET is supported and the
couple idle works on it without IPI. As I mentioned, we do use
clock-domain force wakeup method for wakeup. Code is out of the
tree hence i didn't mention that in first place.

Regards
Santosh

  parent reply	other threads:[~2012-12-20 12:06 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-18  2:30 [PATCH V3 0/5] ARM: tegra20: cpuidle: add power-down state Joseph Lo
     [not found] ` <1355797861-12759-1-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-12-18  2:30   ` [PATCH V3 1/5] ARM: tegra: add pending SGI checking API Joseph Lo
2012-12-18  2:42     ` Colin Cross
     [not found]       ` <CAMbhsRSorDf-BebFn+t39zOK4VX4N0Fu0iPrM7XpKZcssTgX9A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-12-18  2:57         ` Joseph Lo
2012-12-18 10:15         ` Peter De Schrijver
     [not found]           ` <20121218101548.GO19258-Rysk9IDjsxmJz7etNGeUX8VPkgjIgRvpAL8bYrjMMd8@public.gmane.org>
2012-12-18 19:36             ` Colin Cross
     [not found]               ` <CAMbhsRSDwSoHoEs93NZhDchCS28-vQCuW2p+kqfNKeqLygL2sQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-12-19  1:06                 ` Joseph Lo
     [not found]                   ` <1355879172.4449.10.camel-yx3yKKdKkHfc7b1ADBJPm0n48jw8i0AO@public.gmane.org>
2012-12-19  3:47                     ` Joseph Lo
2012-12-20  7:16                 ` Santosh Shilimkar
     [not found]                   ` <50D2BB51.9000109-l0cyMroinI0@public.gmane.org>
2012-12-20  9:34                     ` Peter De Schrijver
     [not found]                       ` <20121220093412.GE19258-Rysk9IDjsxmJz7etNGeUX8VPkgjIgRvpAL8bYrjMMd8@public.gmane.org>
2012-12-20  9:49                         ` Santosh Shilimkar
     [not found]                           ` <50D2DF45.1000305-l0cyMroinI0@public.gmane.org>
2012-12-20  9:59                             ` Peter De Schrijver
     [not found]                               ` <20121220095951.GG19258-Rysk9IDjsxmJz7etNGeUX8VPkgjIgRvpAL8bYrjMMd8@public.gmane.org>
2012-12-20 10:24                                 ` Santosh Shilimkar
     [not found]                                   ` <50D2E76C.7050309-l0cyMroinI0@public.gmane.org>
2012-12-20 11:14                                     ` Peter De Schrijver
     [not found]                                       ` <20121220111409.GH19258-Rysk9IDjsxmJz7etNGeUX8VPkgjIgRvpAL8bYrjMMd8@public.gmane.org>
2012-12-20 12:06                                         ` Santosh Shilimkar [this message]
2012-12-18  2:30   ` [PATCH V3 2/5] ARM: tegra20: cpuidle: add powered-down state for secondary CPU Joseph Lo
2012-12-18  2:46     ` Colin Cross
     [not found]       ` <CAMbhsRTLo6jS_7hqVVtgaa8_ZweAwicrgghaaFWfnzHpc6f1Pg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-12-18  3:06         ` Joseph Lo
     [not found]     ` <1355797861-12759-3-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-12-20 17:43       ` Stephen Warren
     [not found]         ` <50D34E28.5000208-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-12-21  6:36           ` Joseph Lo
     [not found]             ` <1356071804.26029.34.camel-yx3yKKdKkHfc7b1ADBJPm0n48jw8i0AO@public.gmane.org>
2012-12-21 21:04               ` Stephen Warren
2012-12-18  2:30   ` [PATCH V3 3/5] ARM: tegra20: clocks: add CPU low-power function into tegra_cpu_car_ops Joseph Lo
     [not found]     ` <1355797861-12759-4-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-12-20 17:46       ` Stephen Warren
     [not found]         ` <50D34F12.9080801-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-12-21  5:02           ` Joseph Lo
     [not found]             ` <1356066131.26029.26.camel-yx3yKKdKkHfc7b1ADBJPm0n48jw8i0AO@public.gmane.org>
2012-12-21 21:10               ` Stephen Warren
2012-12-18  2:31   ` [PATCH V3 4/5] ARM: tegra20: flowctrl: add support for cpu_suspend_enter/exit Joseph Lo
2012-12-18  2:31   ` [PATCH V3 5/5] ARM: tegra20: cpuidle: apply coupled cpuidle for powered-down mode Joseph Lo
     [not found]     ` <1355797861-12759-6-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-12-18 10:18       ` Peter De Schrijver
2012-12-20 17:54       ` Stephen Warren
     [not found]         ` <50D350C1.6070400-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-12-21  7:10           ` Joseph Lo
     [not found]             ` <1356073828.26029.49.camel-yx3yKKdKkHfc7b1ADBJPm0n48jw8i0AO@public.gmane.org>
2012-12-21 21:06               ` Stephen Warren
2013-01-02 19:05   ` [PATCH V3 0/5] ARM: tegra20: cpuidle: add power-down state Stephen Warren
     [not found]     ` <50E484ED.90108-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-01-03  8:39       ` Joseph Lo

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