linaro-release team mailing list archive

[Amit Kucheria <784176@xxxxxxxxxxxxxxxxxx>]

On 11 May 19, Alexander Sack wrote:
> amit, is it ok to have CPU_FREQ not working for any of our kernels? any
> way forward for 11.05 release?

The patches applied to Nico's tree have been rejected upstream. They should
work for OMAP3, but for OMAP4 it only supports MPU scaling.

I've cc'ed Vishwa who is author on some of the patches.

TBH, I feel we shouldn't worry about the OMAP4 case and only get it working
on OMAP3 for now.

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https://bugs.launchpad.net/bugs/784176

Title:
  CPU_FREQ support is broken for OMAP 3 and OMAP 4

Status in Linaro Linux:
  New
Status in “linux-linaro-omap” package in Ubuntu:
  New
Status in “linux-ti-omap4” package in Ubuntu:
  New

Bug description:
  Current both Nicolas and Andy's kernel tree (2.6.38) is lacking proper
  support for CPU_FREQ. On OMAP 4 it tries to change the frequencies for
  the first CPU, and on OMAP 3 is basically freezes when calling
  cpufreq-info, besides not having a proper frequency scaling.

  The workaround now for the linux-linaro-omap kernel is to disable
  CPU_FREQ, so this bug is basically to track why it's currently
  disabled.