All of lore.kernel.org
 help / color / mirror / Atom feed
From: Dan Malek <dan@embeddededge.com>
To: Bob Lees <bob@diamond.demon.co.uk>
Cc: linux-mips@linux-mips.org
Subject: Re: Frequency (cpu speed) control on AU1100
Date: Tue, 30 Mar 2004 16:56:19 -0500	[thread overview]
Message-ID: <4069ED03.8060202@embeddededge.com> (raw)
In-Reply-To: 200403302137.38123.bob@diamond.demon.co.uk

Bob Lees wrote:

 > ....I suspect I am
> missing something somewhere, but I can't find any references to cpu speed 
> control for the MIPS processors, specically the au1x range.

The Au1xxx has a PLL that multiplies the incoming 12 MHz clock up to the
internal frequency.  Just be aware there are lots of peripheral clocks
and bus clocks derived from this internal frequency.  There is code
in the kernel power management to allow changing the frequency during
operation of Linux, but I don't know how well it works today as I have
not tested that for quite some time.

Thanks.


	-- Dan

  parent reply	other threads:[~2004-03-30 21:54 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-03-30 20:37 Frequency (cpu speed) control on AU1100 Bob Lees
2004-03-30 21:14 ` Pete Popov
2004-03-30 21:56 ` Dan Malek [this message]
2004-03-30 22:38   ` Bob Lees
2004-03-30 22:48     ` Pete Popov
2004-03-31 14:33       ` Bob Lees
2004-03-30 23:26     ` Dan Malek

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4069ED03.8060202@embeddededge.com \
    --to=dan@embeddededge.com \
    --cc=bob@diamond.demon.co.uk \
    --cc=linux-mips@linux-mips.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.