ARM: mx28: cpufreq-cpu0 support?

Fabio Estevam festevam at gmail.com
Wed Sep 24 14:47:46 PDT 2014


On Wed, Sep 24, 2014 at 5:46 PM, Stefan Wahren <info at lategoodbye.de> wrote:

> thanks, registering cpufreq-cpu0 and adding missing properties reg & clocks
> did the trick.
>
> Now the sys interface of cpufreq is available and the mxs-regulator seems to
> handle frequency change. But the frequency selection do not work as
> expected. If i set cpu frequency to 454736, 392727 or 261818 kHz, the

Why 454736 instead of 454MHz? Same for the other values.

> cpufreq driver change it silently to 240000 kHz.

24MHz is the osc clock. It seems you did not turn on the PLL0.

Check the POWER bit of HW_CLKCTRL_PLL0CTRL0 register.



More information about the linux-arm-kernel mailing list