Re: ARM: mx28: cpufreq-cpu0 support?

Fabio Estevam <[email protected]> Mon, 22 Sep 2014 19:18:49 -0300

Newsgroups	org.kernel.vger.cpufreq,org.infradead.lists.linux-arm-kernel
Message-ID	<CAOMZO5A0of3_arOx2z0_t7xN37jQjJ5uU4gwcsgCuSdpBJJVzw@mail.gmail.com>

Hi Stefan,

On Mon, Sep 22, 2014 at 6:25 PM, Stefan Wahren <[email protected]> wrote:

> i've ported the mxs-regulator driver and now i'm getting an probing output
> like above with Linux 3.17-rc4.

Great, it looks like you are making good progress :-)

>
> Now i want to test the mxs-regulator driver with the cpufreq-cpu0 as
> consumer. So i defined cpu@0 according to cpufreq-cpu0 binding in imx28.dtsi
> and enabled cpufreq-cpu0 driver and userspace gov in Kernel config.
>
> But if i modprobe cpufreq-cpu0 i don't get any output and the entry
> /sys/devices/system/cpu/cpu0/cpufreq is also missing.
>
> Any ideas, what's wrong or missing?

Have you registered cpufreq-cpu0 inside arch/arm/mach-mxs/mach-mxs.c?

Take a look at this patch for an example:
http://www.spinics.net/lists/arm-kernel/msg363761.html