[PATCH] cpufreq: instantiate cpufreq-cpu0 as a platform_driver

Shawn Guo shawn.guo at linaro.org
Mon Jan 28 02:02:08 EST 2013

On Mon, Jan 28, 2013 at 09:42:29AM +0530, Viresh Kumar wrote:
> >         struct platform_device_info devinfo = { .name = "cpufreq-cpu0", };
> >         platform_device_register_full(&devinfo);
> Something similar was being discussed with Andrew (cc'd) on his patch
> for kikwood cpufreq driver.
> We shouldn't encourage addition of above as we are moving towards DT.

Moving towards DT does not really mean that we should never register
platform_device from platform code.  DT is designed to present physical
devices, while what I'm adding here is somewhat a virtual one.  I'm
just using the platform_device/platform_driver mechanism to instantiate
the driver on particular platform.

> So, i would except an compatible array too in your patch and then driver
> can be probed based on compatible string being present in cpu node.

I believe device tree maintainer already stated that we should not
have node/compatible for cpuidle/cpufreq such stuff in DT merely for
asking DT core to create platform_device for them.


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