From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Mikael Pettersson <mikpe@csd.uu.se>
Cc: Andrew Morton <akpm@osdl.org>,
Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH][2.6.7-mm1] perfctr ppc32 update
Date: Tue, 22 Jun 2004 16:19:55 -0500 [thread overview]
Message-ID: <1087939194.1839.13.camel@gaston> (raw)
In-Reply-To: <16600.39256.669322.177553@alkaid.it.uu.se>
> So what you're saying is that PLL_CFG may not reflect the true
> relationship between the TB frequency and the core frequency?
Right.
> That shouldn't be a problem as long as there's _some_ in-kernel
> interface for finding that out. If querying OF isn't the correct
> approach, then what is?
What do you need exactly ? The TB one or the core one ? the core
I suppose ? Well, we should probably define an ppc_get_cpu_core_frequency
or something like that that uses the cpufreq callback like the pmac code
when cpufreq is enabled or default to the old parsing when not. Look at
the pmac code. You may also want to install a cpufreq notifier callback
to be informed of core frequency changes.
Ben.
next prev parent reply other threads:[~2004-06-22 21:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-21 20:14 [PATCH][2.6.7-mm1] perfctr ppc32 update Mikael Pettersson
2004-06-22 18:17 ` Benjamin Herrenschmidt
2004-06-22 20:09 ` Mikael Pettersson
2004-06-22 20:21 ` Benjamin Herrenschmidt
2004-06-22 20:40 ` Mikael Pettersson
2004-06-22 21:19 ` Benjamin Herrenschmidt [this message]
2004-06-22 22:18 ` Mikael Pettersson
2004-06-22 22:14 ` Benjamin Herrenschmidt
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