Re: [iPAQ] Cpu scaling ??

On my machine, Ipaq 3765, this appears to be in /proc/sys/cpu/0/speed, is
this the same reference?

If so when I use, for example, "echo [-n] 191700 > speed" the value doesn't
change. I take it from the comments and contents of sa1100_dram_settings
that this should change the cpu speed. I am running a home built kernel from
cvs checkout on 27 December.

Looking at the Makefile in arch/arm/mach-sa1100/ it appears that
"CONFIG_SA1100_LART" needs to be set to get cpu-sa1100.c compiled. In my
fairly stock .config, from the default 3600 config a la Jamey, this is not
set. From the help notes it shouldn't be, I'm not running a LART. So should
this compile option be tied to a different config item or items or should I
be defining LART and if so will this have a detrimental effect on the rest of
my 3600 operation??

Help!!

Bob

On Sunday 06 January 2002 12:17 pm, Erik Mouw wrote:
> On Fri, Jan 04, 2002 at 01:50:16PM +0100, Diego wrote:
> > I used to change my cpu speed when I had familiar .4 but now with 0.5 I
> > don't see where I can change it in /proc what am I doing wrong?
>
> We changed the interface, it's now in /proc/cpu/0/speed . It also
> expects the CPU speed in kHz instead of a simple clock divider. See the
> sa1100_dram_settings structure in arch/arm/mach-sa1100/cpu-sa1100.c for
> a list of valid numbers (and no, the speed won't go under 147500 on
> SA1110 systems, see arch/arm/mach-sa1100/cpu-sa1110.c).
>
>
> Erik
Received on Sun Jan 6 10:38:36 2002