From: Jon Hunter <jon-hunter@ti.com>
To: Paul Walmsley <paul@pwsan.com>
Cc: "Hiremath, Vaibhav" <hvaibhav@ti.com>,
Igor Grinberg <grinberg@compulab.co.il>,
Tony Lindgren <tony@atomide.com>,
"Hilman, Kevin" <khilman@ti.com>,
"linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"Shilimkar, Santosh" <santosh.shilimkar@ti.com>
Subject: Re: [PATCH] ARM: OMAP2+: timer: remove CONFIG_OMAP_32K_TIMER
Date: Thu, 8 Nov 2012 12:08:37 -0600 [thread overview]
Message-ID: <509BF525.80309@ti.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1211081754390.20703@utopia.booyaka.com>
On 11/08/2012 11:58 AM, Paul Walmsley wrote:
> On Thu, 8 Nov 2012, Jon Hunter wrote:
>
>> Igor was mentioning a h/w scenario where the 32kHz source is not
>> present. However, I am not sure which devices support this and is
>> applicable too.
>
> Pretty sure Igor is referring to the AM3517/3505. This is very poorly
> documented, but can be observed in the AM3517 TRM Rev B (SPRUGR0B) Figure
> 4-23 "PRM Clock Generator" and the AM3517 DM Rev C (SPRS550C) Section 4
> "Clock Specifications".
Thanks Paul. But AFAICT, even in that h/w configuration the internal 32k
oscillator will be used and so the gptimer will still have a 32k clock
source.
So I still don't see a use-case where the gptimer would not have a 32k
source available. Admittedly, I could be missing one somewhere or I am
just plain old wrong ...
Cheers
Jon
WARNING: multiple messages have this Message-ID (diff)
From: jon-hunter@ti.com (Jon Hunter)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: OMAP2+: timer: remove CONFIG_OMAP_32K_TIMER
Date: Thu, 8 Nov 2012 12:08:37 -0600 [thread overview]
Message-ID: <509BF525.80309@ti.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1211081754390.20703@utopia.booyaka.com>
On 11/08/2012 11:58 AM, Paul Walmsley wrote:
> On Thu, 8 Nov 2012, Jon Hunter wrote:
>
>> Igor was mentioning a h/w scenario where the 32kHz source is not
>> present. However, I am not sure which devices support this and is
>> applicable too.
>
> Pretty sure Igor is referring to the AM3517/3505. This is very poorly
> documented, but can be observed in the AM3517 TRM Rev B (SPRUGR0B) Figure
> 4-23 "PRM Clock Generator" and the AM3517 DM Rev C (SPRS550C) Section 4
> "Clock Specifications".
Thanks Paul. But AFAICT, even in that h/w configuration the internal 32k
oscillator will be used and so the gptimer will still have a 32k clock
source.
So I still don't see a use-case where the gptimer would not have a 32k
source available. Admittedly, I could be missing one somewhere or I am
just plain old wrong ...
Cheers
Jon
next prev parent reply other threads:[~2012-11-08 18:08 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-07 14:42 [PATCH] ARM: OMAP2+: timer: remove CONFIG_OMAP_32K_TIMER Igor Grinberg
2012-11-07 14:42 ` Igor Grinberg
2012-11-07 17:33 ` Tony Lindgren
2012-11-07 17:33 ` Tony Lindgren
2012-11-08 7:13 ` Igor Grinberg
2012-11-08 7:13 ` Igor Grinberg
2012-11-08 16:20 ` Tony Lindgren
2012-11-08 16:20 ` Tony Lindgren
2012-11-08 17:09 ` Hiremath, Vaibhav
2012-11-08 17:09 ` Hiremath, Vaibhav
2012-11-11 9:16 ` Igor Grinberg
2012-11-11 9:16 ` Igor Grinberg
2012-11-12 19:05 ` Jon Hunter
2012-11-12 19:05 ` Jon Hunter
2012-11-13 9:08 ` Igor Grinberg
2012-11-13 9:08 ` Igor Grinberg
2012-11-12 22:06 ` Tony Lindgren
2012-11-12 22:06 ` Tony Lindgren
2012-11-07 21:36 ` Jon Hunter
2012-11-07 21:36 ` Jon Hunter
2012-11-08 7:59 ` Igor Grinberg
2012-11-08 7:59 ` Igor Grinberg
2012-11-08 16:16 ` Jon Hunter
2012-11-08 16:16 ` Jon Hunter
2012-11-08 17:08 ` Hiremath, Vaibhav
2012-11-08 17:08 ` Hiremath, Vaibhav
2012-11-08 17:39 ` Jon Hunter
2012-11-08 17:39 ` Jon Hunter
2012-11-08 17:47 ` Hiremath, Vaibhav
2012-11-08 17:47 ` Hiremath, Vaibhav
2012-11-08 17:58 ` Jon Hunter
2012-11-08 17:58 ` Jon Hunter
2012-11-08 18:06 ` Hiremath, Vaibhav
2012-11-08 18:06 ` Hiremath, Vaibhav
2012-11-08 18:13 ` Jon Hunter
2012-11-08 18:13 ` Jon Hunter
2012-11-08 18:28 ` Hiremath, Vaibhav
2012-11-08 18:28 ` Hiremath, Vaibhav
2012-11-08 18:47 ` Jon Hunter
2012-11-08 18:47 ` Jon Hunter
2012-11-09 0:55 ` Jon Hunter
2012-11-09 0:55 ` Jon Hunter
2012-11-12 6:42 ` Hiremath, Vaibhav
2012-11-12 6:42 ` Hiremath, Vaibhav
2012-11-08 17:58 ` Paul Walmsley
2012-11-08 17:58 ` Paul Walmsley
2012-11-08 18:08 ` Jon Hunter [this message]
2012-11-08 18:08 ` Jon Hunter
2012-11-08 18:17 ` Paul Walmsley
2012-11-08 18:17 ` Paul Walmsley
2012-11-08 18:34 ` Jon Hunter
2012-11-08 18:34 ` Jon Hunter
2012-11-11 11:35 ` Igor Grinberg
2012-11-11 11:35 ` Igor Grinberg
2012-11-12 6:38 ` Hiremath, Vaibhav
2012-11-12 6:38 ` Hiremath, Vaibhav
2012-11-12 7:24 ` Igor Grinberg
2012-11-12 7:24 ` Igor Grinberg
2012-11-12 10:40 ` Hiremath, Vaibhav
2012-11-12 10:40 ` Hiremath, Vaibhav
2012-12-10 20:49 ` Paul Walmsley
2012-12-10 20:49 ` Paul Walmsley
2012-12-14 23:58 ` Russ Dill
2012-12-14 23:58 ` Russ Dill
2012-11-11 11:25 ` Igor Grinberg
2012-11-11 11:25 ` Igor Grinberg
2012-11-08 18:54 ` Jon Hunter
2012-11-08 18:54 ` Jon Hunter
2012-11-08 18:59 ` Hiremath, Vaibhav
2012-11-08 18:59 ` Hiremath, Vaibhav
2012-11-08 19:16 ` Jon Hunter
2012-11-08 19:16 ` Jon Hunter
2012-11-11 11:28 ` Igor Grinberg
2012-11-11 11:28 ` Igor Grinberg
2012-11-12 19:15 ` Jon Hunter
2012-11-12 19:15 ` Jon Hunter
2012-11-13 9:14 ` Igor Grinberg
2012-11-13 9:14 ` Igor Grinberg
2012-11-13 16:13 ` Jon Hunter
2012-11-13 16:13 ` Jon Hunter
2012-11-14 7:23 ` Igor Grinberg
2012-11-14 7:23 ` Igor Grinberg
2012-11-12 10:38 ` Hiremath, Vaibhav
2012-11-12 10:38 ` Hiremath, Vaibhav
2012-11-12 11:01 ` Benoit Cousson
2012-11-12 11:01 ` Benoit Cousson
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