From: Santosh Shilimkar <santosh.shilimkar@ti.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Jon Hunter <jon-hunter@ti.com>,
"Hiremath, Vaibhav" <hvaibhav@ti.com>,
Tony Lindgren <tony@atomide.com>,
"Hilman, Kevin" <khilman@ti.com>, Paul Walmsley <paul@pwsan.com>,
"Cousson, Benoit" <b-cousson@ti.com>,
"marc.zyngier@arm.com" <marc.zyngier@arm.com>,
Ming Lei <tom.leiming@gmail.com>, "Balbi, Felipe" <balbi@ti.com>,
"johnstul@us.ibm.com" <johnstul@us.ibm.com>,
"linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>,
"DebBarma, Tarun Kanti" <tarun.kanti@ti.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 1/3] ARM: OMAP2+: 32k-counter: Use hwmod lookup to check presence of 32k timer
Date: Tue, 10 Apr 2012 14:27:36 +0530 [thread overview]
Message-ID: <4F83F600.4000002@ti.com> (raw)
In-Reply-To: <20120410084413.GD25053@n2100.arm.linux.org.uk>
On Tuesday 10 April 2012 02:14 PM, Russell King - ARM Linux wrote:
> On Mon, Apr 09, 2012 at 03:18:22PM -0500, Jon Hunter wrote:
>> True, but we would always want to use the 32k timer if CONFIG_PM is
>> specified. So what I am saying is that if a device has a 32ksync timer
>> and CONFIG_PM is defined, we always want to use the 32ksync timer and a
>> gptimer should never be used.
>
> Why? What if you want to have PM enabled, and you also want to use the
> kernels high resolution timers, or you want more accurate timing than
> the 30.5us tick interval of the 32k timer?
You might have missed the earlier comments on the thread. High
resolution GP timer(sysclk) will stop in deeper power states and
hence it can't be used with PM enabled usecases.
Regards
Santosh
WARNING: multiple messages have this Message-ID (diff)
From: santosh.shilimkar@ti.com (Santosh Shilimkar)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/3] ARM: OMAP2+: 32k-counter: Use hwmod lookup to check presence of 32k timer
Date: Tue, 10 Apr 2012 14:27:36 +0530 [thread overview]
Message-ID: <4F83F600.4000002@ti.com> (raw)
In-Reply-To: <20120410084413.GD25053@n2100.arm.linux.org.uk>
On Tuesday 10 April 2012 02:14 PM, Russell King - ARM Linux wrote:
> On Mon, Apr 09, 2012 at 03:18:22PM -0500, Jon Hunter wrote:
>> True, but we would always want to use the 32k timer if CONFIG_PM is
>> specified. So what I am saying is that if a device has a 32ksync timer
>> and CONFIG_PM is defined, we always want to use the 32ksync timer and a
>> gptimer should never be used.
>
> Why? What if you want to have PM enabled, and you also want to use the
> kernels high resolution timers, or you want more accurate timing than
> the 30.5us tick interval of the 32k timer?
You might have missed the earlier comments on the thread. High
resolution GP timer(sysclk) will stop in deeper power states and
hence it can't be used with PM enabled usecases.
Regards
Santosh
next prev parent reply other threads:[~2012-04-10 8:57 UTC|newest]
Thread overview: 146+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-19 14:28 [PATCH 0/3] ARM: OMAP1/2+: 32k-timer: Add hwmod lookup for 32k-timer Vaibhav Hiremath
2012-01-19 14:28 ` Vaibhav Hiremath
2012-01-19 14:28 ` [PATCH 1/3] ARM: OMAP2+: 32k-counter: Use hwmod lookup to check presence of 32k timer Vaibhav Hiremath
2012-01-19 14:28 ` Vaibhav Hiremath
2012-01-23 23:38 ` Kevin Hilman
2012-01-23 23:38 ` Kevin Hilman
2012-01-24 8:53 ` Hiremath, Vaibhav
2012-01-24 8:53 ` Hiremath, Vaibhav
2012-01-24 17:47 ` Kevin Hilman
2012-01-24 17:47 ` Kevin Hilman
2012-02-01 8:00 ` Hiremath, Vaibhav
2012-02-01 8:00 ` Hiremath, Vaibhav
2012-03-13 11:37 ` Ming Lei
2012-03-13 11:37 ` Ming Lei
2012-03-19 11:11 ` Hiremath, Vaibhav
2012-03-19 11:11 ` Hiremath, Vaibhav
2012-03-19 11:44 ` Ming Lei
2012-03-19 11:44 ` Ming Lei
2012-03-19 12:15 ` Santosh Shilimkar
2012-03-19 12:15 ` Santosh Shilimkar
2012-03-21 11:42 ` Hiremath, Vaibhav
2012-03-21 11:42 ` Hiremath, Vaibhav
2012-03-21 14:00 ` Shilimkar, Santosh
2012-03-21 14:00 ` Shilimkar, Santosh
2012-03-28 14:16 ` Hiremath, Vaibhav
2012-03-28 14:16 ` Hiremath, Vaibhav
2012-03-28 14:20 ` Shilimkar, Santosh
2012-03-28 14:20 ` Shilimkar, Santosh
2012-03-28 14:37 ` Hiremath, Vaibhav
2012-03-28 14:37 ` Hiremath, Vaibhav
2012-03-28 14:49 ` Shilimkar, Santosh
2012-03-28 14:49 ` Shilimkar, Santosh
2012-03-30 6:34 ` Hiremath, Vaibhav
2012-03-30 6:34 ` Hiremath, Vaibhav
2012-03-30 7:41 ` Shilimkar, Santosh
2012-03-30 7:41 ` Shilimkar, Santosh
2012-03-30 8:32 ` Hiremath, Vaibhav
2012-03-30 8:32 ` Hiremath, Vaibhav
2012-03-30 8:38 ` Santosh Shilimkar
2012-03-30 8:38 ` Santosh Shilimkar
2012-03-30 9:12 ` Hiremath, Vaibhav
2012-03-30 9:12 ` Hiremath, Vaibhav
2012-03-30 9:20 ` Shilimkar, Santosh
2012-03-30 9:20 ` Shilimkar, Santosh
2012-03-30 9:28 ` Hiremath, Vaibhav
2012-03-30 9:28 ` Hiremath, Vaibhav
2012-03-30 9:42 ` Shilimkar, Santosh
2012-03-30 9:42 ` Shilimkar, Santosh
2012-03-30 11:29 ` Hiremath, Vaibhav
2012-03-30 11:29 ` Hiremath, Vaibhav
2012-03-30 11:35 ` Santosh Shilimkar
2012-03-30 11:35 ` Santosh Shilimkar
2012-03-31 1:30 ` Ming Lei
2012-03-31 1:30 ` Ming Lei
2012-03-31 6:30 ` Shilimkar, Santosh
2012-03-31 6:30 ` Shilimkar, Santosh
2012-03-31 8:39 ` Ming Lei
2012-03-31 8:39 ` Ming Lei
2012-03-31 19:10 ` Shilimkar, Santosh
2012-03-31 19:10 ` Shilimkar, Santosh
2012-04-01 1:39 ` Ming Lei
2012-04-01 1:39 ` Ming Lei
2012-04-01 5:53 ` Shilimkar, Santosh
2012-04-01 5:53 ` Shilimkar, Santosh
2012-04-02 18:35 ` Kevin Hilman
2012-04-02 18:35 ` Kevin Hilman
2012-04-03 5:50 ` Shilimkar, Santosh
2012-04-03 5:50 ` Shilimkar, Santosh
2012-04-03 15:35 ` Hiremath, Vaibhav
2012-04-03 15:35 ` Hiremath, Vaibhav
2012-04-04 9:04 ` Shilimkar, Santosh
2012-04-04 9:04 ` Shilimkar, Santosh
2012-04-04 10:39 ` Hiremath, Vaibhav
2012-04-04 10:39 ` Hiremath, Vaibhav
2012-04-05 9:36 ` Hiremath, Vaibhav
2012-04-05 9:36 ` Hiremath, Vaibhav
2012-04-05 9:52 ` Russell King - ARM Linux
2012-04-05 9:52 ` Russell King - ARM Linux
2012-04-05 10:31 ` Hiremath, Vaibhav
2012-04-05 10:31 ` Hiremath, Vaibhav
2012-04-05 10:46 ` Santosh Shilimkar
2012-04-05 10:46 ` Santosh Shilimkar
2012-04-05 21:33 ` Kevin Hilman
2012-04-05 21:33 ` Kevin Hilman
2012-04-06 5:21 ` Hiremath, Vaibhav
2012-04-06 5:21 ` Hiremath, Vaibhav
2012-04-06 18:04 ` Tony Lindgren
2012-04-06 18:04 ` Tony Lindgren
2012-04-09 6:19 ` Hiremath, Vaibhav
2012-04-09 6:19 ` Hiremath, Vaibhav
2012-04-09 20:18 ` Jon Hunter
2012-04-09 20:18 ` Jon Hunter
2012-04-10 5:42 ` Hiremath, Vaibhav
2012-04-10 5:42 ` Hiremath, Vaibhav
2012-04-10 8:44 ` Russell King - ARM Linux
2012-04-10 8:44 ` Russell King - ARM Linux
2012-04-10 8:57 ` Santosh Shilimkar [this message]
2012-04-10 8:57 ` Santosh Shilimkar
2012-04-10 9:29 ` Russell King - ARM Linux
2012-04-10 9:29 ` Russell King - ARM Linux
2012-04-10 9:51 ` Shilimkar, Santosh
2012-04-10 9:51 ` Shilimkar, Santosh
2012-04-10 21:03 ` Jon Hunter
2012-04-10 21:03 ` Jon Hunter
2012-04-11 1:00 ` Ming Lei
2012-04-11 1:00 ` Ming Lei
2012-04-11 7:47 ` Shilimkar, Santosh
2012-04-11 7:47 ` Shilimkar, Santosh
2012-04-06 21:18 ` Kevin Hilman
2012-04-06 21:18 ` Kevin Hilman
2012-04-09 6:25 ` Hiremath, Vaibhav
2012-04-09 6:25 ` Hiremath, Vaibhav
2012-03-21 11:29 ` Hiremath, Vaibhav
2012-03-21 11:29 ` Hiremath, Vaibhav
2012-03-23 8:20 ` Ming Lei
2012-03-23 8:20 ` Ming Lei
2012-03-30 6:39 ` Hiremath, Vaibhav
2012-03-30 6:39 ` Hiremath, Vaibhav
2012-03-05 22:55 ` Tony Lindgren
2012-03-05 22:55 ` Tony Lindgren
2012-03-07 9:48 ` Hiremath, Vaibhav
2012-03-07 9:48 ` Hiremath, Vaibhav
2012-03-09 17:58 ` Hiremath, Vaibhav
2012-03-09 17:58 ` Hiremath, Vaibhav
2012-03-12 9:39 ` Felipe Balbi
2012-03-12 9:39 ` Felipe Balbi
2012-03-12 9:48 ` Hiremath, Vaibhav
2012-03-12 9:48 ` Hiremath, Vaibhav
2012-03-12 10:17 ` Felipe Balbi
2012-03-12 10:17 ` Felipe Balbi
2012-03-12 10:39 ` Hiremath, Vaibhav
2012-03-12 10:39 ` Hiremath, Vaibhav
2012-01-19 14:28 ` [PATCH 2/3] ARM: OMAP2/3: Add idle_st bits for ST_32KSYNC timer to prcm-common header Vaibhav Hiremath
2012-01-19 14:28 ` Vaibhav Hiremath
2012-03-05 22:56 ` Tony Lindgren
2012-03-05 22:56 ` Tony Lindgren
2012-03-07 9:49 ` Hiremath, Vaibhav
2012-03-07 9:49 ` Hiremath, Vaibhav
2012-01-19 14:28 ` [PATCH 3/3] ARM: OMAP2+: hwmod data: Add 32k-sync timer data to hwmod database Vaibhav Hiremath
2012-01-19 14:28 ` Vaibhav Hiremath
2012-01-23 8:47 ` [PATCH 0/3] ARM: OMAP1/2+: 32k-timer: Add hwmod lookup for 32k-timer Hiremath, Vaibhav
2012-01-23 8:47 ` Hiremath, Vaibhav
2012-03-05 22:57 ` Tony Lindgren
2012-03-05 22:57 ` Tony Lindgren
2012-03-07 9:50 ` Hiremath, Vaibhav
2012-03-07 9:50 ` Hiremath, Vaibhav
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