Re: [iPAQ] Cpu scaling ??

So, if the old cpu-scale method worked OK, without dram timing problems, then
either the ipaq is less sensitive to such issues or cpu-scale related code
has the timings required. (I guess there are other conclusions, but these
spring to mind first) I can't check the old 2.4.7 code as I don't have it
any more, needed the disk space:( Can anyone who has the code for the
cpu-scale related clock changes comment?

Bob

On Monday 07 January 2002 12:08 pm, bob lees wrote:
> So as it currently stands, there is no way of changing the cpu speed on the
> IPAQ, with the current cvs baseline. Is this correct? or can we go back to
> the old cpu-scale method with the current 2.4.16 cvs.
>
> Bob
>
> On Sunday 06 January 2002 7:15 pm, Erik Mouw wrote:
> > On Sun, Jan 06, 2002 at 06:37:14PM +0000, bob lees wrote:
> > > On my machine, Ipaq 3765, this appears to be in /proc/sys/cpu/0/speed,
> > > is this the same reference?
> >
> > Yes, that's the same. I forgot the 'sys' part.
> >
> > > 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.
> >
> > Ipaq is not yet supported, somebody with exact knowledge of the memory
> > parameters (i.e.: the Compaq people) should put a struct sdram_params
> > for each Ipaq in cpu-sa1110.c.
> >
> > > 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??
> >
> > The Ipaq uses an SA1110 CPU, so you need cpu-sa1110.c instead of
> > cpu-sa1100.c.
> >
> >
> > Erik
Received on Mon Jan 7 14:22:32 2002