From: linux@arm.linux.org.uk (Russell King - ARM Linux)
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 10:29:04 +0100 [thread overview]
Message-ID: <20120410092904.GE25053@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <4F83F600.4000002@ti.com>
On Tue, Apr 10, 2012 at 02:27:36PM +0530, Santosh Shilimkar wrote:
> 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.
Which means folk should be given the choice at boot time between running
with the deeper power states and having a higher resolution timing source,
rather than denying them the higher resolution timing source when PM is
enabled.
next prev parent reply other threads:[~2012-04-10 9:29 UTC|newest]
Thread overview: 73+ 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 ` [PATCH 1/3] ARM: OMAP2+: 32k-counter: Use hwmod lookup to check presence of 32k timer Vaibhav Hiremath
2012-01-23 23:38 ` Kevin Hilman
2012-01-24 8:53 ` Hiremath, Vaibhav
2012-01-24 17:47 ` Kevin Hilman
2012-02-01 8:00 ` Hiremath, Vaibhav
2012-03-13 11:37 ` Ming Lei
2012-03-19 11:11 ` Hiremath, Vaibhav
2012-03-19 11:44 ` Ming Lei
2012-03-19 12:15 ` Santosh Shilimkar
2012-03-21 11:42 ` Hiremath, Vaibhav
2012-03-21 14:00 ` Shilimkar, Santosh
2012-03-28 14:16 ` Hiremath, Vaibhav
2012-03-28 14:20 ` Shilimkar, Santosh
2012-03-28 14:37 ` Hiremath, Vaibhav
2012-03-28 14:49 ` Shilimkar, Santosh
2012-03-30 6:34 ` Hiremath, Vaibhav
2012-03-30 7:41 ` Shilimkar, Santosh
2012-03-30 8:32 ` Hiremath, Vaibhav
2012-03-30 8:38 ` Santosh Shilimkar
2012-03-30 9:12 ` Hiremath, Vaibhav
2012-03-30 9:20 ` Shilimkar, Santosh
2012-03-30 9:28 ` Hiremath, Vaibhav
2012-03-30 9:42 ` Shilimkar, Santosh
2012-03-30 11:29 ` Hiremath, Vaibhav
2012-03-30 11:35 ` Santosh Shilimkar
2012-03-31 1:30 ` Ming Lei
2012-03-31 6:30 ` Shilimkar, Santosh
2012-03-31 8:39 ` Ming Lei
2012-03-31 19:10 ` Shilimkar, Santosh
2012-04-01 1:39 ` Ming Lei
2012-04-01 5:53 ` Shilimkar, Santosh
2012-04-02 18:35 ` Kevin Hilman
2012-04-03 5:50 ` Shilimkar, Santosh
2012-04-03 15:35 ` Hiremath, Vaibhav
2012-04-04 9:04 ` Shilimkar, Santosh
2012-04-04 10:39 ` Hiremath, Vaibhav
2012-04-05 9:36 ` Hiremath, Vaibhav
2012-04-05 9:52 ` Russell King - ARM Linux
2012-04-05 10:31 ` Hiremath, Vaibhav
2012-04-05 10:46 ` Santosh Shilimkar
2012-04-05 21:33 ` Kevin Hilman
2012-04-06 5:21 ` Hiremath, Vaibhav
2012-04-06 18:04 ` Tony Lindgren
2012-04-09 6:19 ` Hiremath, Vaibhav
2012-04-09 20:18 ` Jon Hunter
2012-04-10 5:42 ` Hiremath, Vaibhav
2012-04-10 8:44 ` Russell King - ARM Linux
2012-04-10 8:57 ` Santosh Shilimkar
2012-04-10 9:29 ` Russell King - ARM Linux [this message]
2012-04-10 9:51 ` Shilimkar, Santosh
2012-04-10 21:03 ` Jon Hunter
2012-04-11 1:00 ` Ming Lei
2012-04-11 7:47 ` Shilimkar, Santosh
2012-04-06 21:18 ` Kevin Hilman
2012-04-09 6:25 ` Hiremath, Vaibhav
2012-03-21 11:29 ` Hiremath, Vaibhav
2012-03-23 8:20 ` Ming Lei
2012-03-30 6:39 ` Hiremath, Vaibhav
2012-03-05 22:55 ` Tony Lindgren
2012-03-07 9:48 ` Hiremath, Vaibhav
2012-03-09 17:58 ` Hiremath, Vaibhav
2012-03-12 9:39 ` Felipe Balbi
2012-03-12 9:48 ` Hiremath, Vaibhav
2012-03-12 10:17 ` Felipe Balbi
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
2012-03-05 22:56 ` Tony Lindgren
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
2012-01-23 8:47 ` [PATCH 0/3] ARM: OMAP1/2+: 32k-timer: Add hwmod lookup for 32k-timer Hiremath, Vaibhav
2012-03-05 22:57 ` Tony Lindgren
2012-03-07 9:50 ` Hiremath, Vaibhav
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