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[vishwanath sripathy <784176@xxxxxxxxxxxxxxxxxx>]

linux-linaro-2.6.39 does not have DVFS Framework itself. So cpufreq is
not expected to work on 2.6.39 linaro kernel.

I applied this patch against 2.6.38 linaro kernel and I do see that l3
clock is properly scaling when I change mpu frequency via cpufreq sysfs
entries.

Note that bogomips does not show MPU Rate properly because of an issue
in cpufreq non SMP plafroms with SMP Enabled in menuconfig. But if you
read the actual clock rate (using below sysfs entry), you see that MPU
clock is scaling.

mount -t debugfs debugfs /debug

cat /debug/clock/virt_26m_ck/osc_sys_ck/sys_ck/dpll1_ck/dpll1_x2_ck/dpll1_x2m2
_ck/mpu_ck/arm_fck/rate

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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:
  Confirmed
Status in “linux-linaro-omap” package in Ubuntu:
  Confirmed
Status in “linux-ti-omap4” package in Ubuntu:
  Confirmed

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.

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