Clock settings

Lars-Peter Clausen lars at metafoo.de
Sun Nov 8 15:01:42 EST 2009


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Bas Wijnen wrote:
> Hi,
>
> On Sun, Nov 08, 2009 at 05:32:03PM +0100, Lars-Peter Clausen wrote:
>> Xiangfu Liu wrote:
>>> Hi Bas Wijnen
>>>
>>> here is some info:
>
> Thanks, I'll see if it helps. :-)
>
> I also noticed that my guess about where the files would be wasn't
> entirely correct, which is why Wolfgang couldn't find them.  Sorry about
> that.
>
>>> root at BenNanoNote:/proc/jz# more pmc
>>> Low Power Mode : IDLE
>>> Doze Mode      : off
>>> IPU            : running
>>> DMAC           : running
>>> UHC            : running
>>> UDC            : stopped
>>> LCD            : running
>>> CIM            : running
>>> SADC           : running
>>> MSC            : running
>>> AIC1           : running
>>> AIC2           : running
>>> SSI            : running
>>> I2C            : running
>>> RTC            : running
>>> TCU            : running
>>> UART1          : running
>>> UART0          : running
>
> It's probably a good idea to stop everything that isn't used: IPU (or is
> it used?), UHC, CIM, SADC, SSI, I2C, UART1.  Not sure how much power it
> saves, but it doesn't bring any gain. :-)
Yup. Clock managment is currently less then optimal.
The question is whether the kernel or the bootloader should decide
which clock to disable?
I think the best would be to disable everything non essential in the
bootloader and if a kernel driver needs a clock it should enable it.

- - Lars
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iEYEARECAAYFAkr3I6YACgkQBX4mSR26RiMKdgCdFJPdEdcC42/TLDq96tDN/01b
uSYAni3UgqDvPyUYP7OJzZ4tn0BecjRh
=lDcp
-----END PGP SIGNATURE-----





More information about the discussion mailing list


interactive