From: Graeme Russ <graeme.russ@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [RFC] Review of U-Boot timer API
Date: Thu, 26 May 2011 07:11:02 +1000 [thread overview]
Message-ID: <4DDD7066.4000505@gmail.com> (raw)
In-Reply-To: <20110525133859.C420DCEFB5B@gemini.denx.de>
On 25/05/11 23:38, Wolfgang Denk wrote:
> Dear Graeme Russ,
>
> In message <BANLkTimhtqYNWgvwr6w8kNOSV4U_tZs7yw@mail.gmail.com> you wrote:
>>
>> And what about platforms that do not support interrupts? Are you
>> mandating that get_timer() MUST always be supported by a timer updated
>> by an ISR?
>
> No, not at all. And I already answered this. For example on PPC, just
> reading the timebase would be perfectly sufficient, and simpler and
> more reliable than the current interrupt based approach.
I assume by 'timebase' you mean the 64-bit tick counter. If so, that is
_exactly_ what I am suggesting we do (and what does already happen on ARM).
The big change is, the prescaler is common code rather than haven dozens
(some of them broken) implementations
Regards,
Graeme
next prev parent reply other threads:[~2011-05-25 21:11 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-21 12:38 [U-Boot] [RFC] Review of U-Boot timer API Graeme Russ
[not found] ` <4DD7DB64.70605@comcast.net>
2011-05-22 0:06 ` Graeme Russ
2011-05-22 0:43 ` J. William Campbell
2011-05-22 4:26 ` Reinhard Meyer
2011-05-22 6:23 ` Graeme Russ
2011-05-22 7:21 ` J. William Campbell
2011-05-22 7:44 ` Graeme Russ
2011-05-22 8:15 ` Reinhard Meyer
2011-05-23 0:02 ` Graeme Russ
2011-05-23 0:20 ` J. William Campbell
2011-05-23 0:14 ` J. William Campbell
2011-05-23 1:00 ` Graeme Russ
[not found] ` <4DD9B608.7080307@comcast.net>
2011-05-23 1:42 ` Graeme Russ
2011-05-23 5:02 ` J. William Campbell
2011-05-23 5:25 ` Graeme Russ
2011-05-23 6:29 ` Albert ARIBAUD
2011-05-23 10:53 ` Graeme Russ
2011-05-23 16:22 ` J. William Campbell
2011-05-23 12:09 ` Wolfgang Denk
2011-05-23 12:29 ` Graeme Russ
2011-05-23 13:19 ` Wolfgang Denk
2011-05-23 17:30 ` J. William Campbell
2011-05-23 18:24 ` Albert ARIBAUD
2011-05-23 19:18 ` Wolfgang Denk
2011-05-23 18:27 ` J. William Campbell
2011-05-23 19:33 ` Wolfgang Denk
2011-05-23 20:26 ` J. William Campbell
2011-05-23 21:51 ` Wolfgang Denk
2011-05-23 20:48 ` Graeme Russ
2011-05-23 3:26 ` Reinhard Meyer
2011-05-23 5:20 ` J. William Campbell
2011-05-22 6:57 ` J. William Campbell
2011-05-23 12:13 ` Wolfgang Denk
2011-05-24 3:42 ` Mike Frysinger
2011-05-24 4:07 ` Graeme Russ
2011-05-24 4:24 ` Mike Frysinger
2011-05-24 4:35 ` Graeme Russ
2011-05-24 5:31 ` Reinhard Meyer
2011-05-24 5:43 ` Graeme Russ
2011-05-24 6:11 ` Albert ARIBAUD
2011-05-24 7:10 ` Graeme Russ
2011-05-24 14:15 ` Wolfgang Denk
2011-05-24 14:12 ` Wolfgang Denk
2011-05-24 15:23 ` J. William Campbell
2011-05-24 19:09 ` Wolfgang Denk
2011-05-24 13:29 ` Scott McNutt
2011-05-24 14:19 ` Wolfgang Denk
2011-05-24 16:51 ` Graeme Russ
2011-05-24 18:59 ` J. William Campbell
2011-05-24 19:31 ` Wolfgang Denk
2011-05-24 19:19 ` Wolfgang Denk
2011-05-24 22:32 ` J. William Campbell
2011-05-25 5:17 ` Wolfgang Denk
2011-05-25 16:50 ` J. William Campbell
2011-05-25 19:56 ` Wolfgang Denk
2011-05-25 0:17 ` Graeme Russ
2011-05-25 2:53 ` J. William Campbell
2011-05-25 3:21 ` Graeme Russ
2011-05-25 5:28 ` Wolfgang Denk
2011-05-25 6:06 ` Graeme Russ
2011-05-25 8:08 ` Wolfgang Denk
2011-05-25 8:38 ` Graeme Russ
2011-05-25 11:37 ` Wolfgang Denk
2011-05-25 11:52 ` Graeme Russ
2011-05-25 12:26 ` Wolfgang Denk
2011-05-25 12:42 ` Graeme Russ
2011-05-25 12:59 ` Wolfgang Denk
2011-05-25 13:14 ` Graeme Russ
2011-05-25 13:38 ` Wolfgang Denk
2011-05-25 21:11 ` Graeme Russ [this message]
2011-05-25 21:16 ` Wolfgang Denk
2011-05-25 23:13 ` Graeme Russ
2011-05-26 0:15 ` J. William Campbell
2011-05-26 0:33 ` Graeme Russ
2011-05-26 4:19 ` Reinhard Meyer
2011-05-26 4:40 ` Graeme Russ
2011-05-26 5:03 ` J. William Campbell
2011-05-26 5:16 ` Wolfgang Denk
2011-05-26 5:25 ` Graeme Russ
2011-05-26 5:55 ` Albert ARIBAUD
2011-05-26 6:18 ` Graeme Russ
2011-05-26 6:36 ` Reinhard Meyer
2011-05-26 8:48 ` Wolfgang Denk
2011-05-26 9:02 ` Graeme Russ
2011-05-26 4:54 ` J. William Campbell
2011-05-25 5:25 ` Wolfgang Denk
2011-05-25 6:02 ` Graeme Russ
2011-05-25 8:06 ` Wolfgang Denk
2011-05-25 8:26 ` Graeme Russ
2011-05-25 11:32 ` Wolfgang Denk
2011-05-25 11:53 ` Graeme Russ
2011-05-25 12:27 ` Wolfgang Denk
2011-05-25 12:36 ` Scott McNutt
2011-05-25 12:43 ` Graeme Russ
2011-05-25 13:08 ` Scott McNutt
2011-05-25 13:16 ` Graeme Russ
2011-05-25 13:46 ` Scott McNutt
2011-05-25 14:21 ` Graeme Russ
2011-05-25 19:46 ` Wolfgang Denk
2011-05-25 20:40 ` J. William Campbell
2011-05-25 20:48 ` Wolfgang Denk
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