Re: [OT] Kernel device tree question

[Gary Thomas <gary@mlbassoc.com>]

On 2014-07-24 09:13, Alexandre Belloni wrote:
> Hi,
>
> On 24/07/2014 at 08:42:45 -0600, Gary Thomas wrote :
>> I have a board (i.MX53) that I need to adjust one of the main
>> clocks (CKO1).  The default setting uses the main CPU clock
>> and I need to change it to use one of the PLL based clocks.
>> I can see where this selector is available as cko1_sel, but
>> it's not clear to me if/where/how I can set this to be pll3_sw
>> in the device tree (which in the modern world is the only place
>> for target platform configuration and control).
>
> Actually, this is exactly what DT is not supposed to be used for. The
> device tree must only describe the hardware and the configuration must
> be avoided.
>
>>
>> Any ideas or pointers?
>>
>
> cko1_sel seems to be declared correctly as a mux so pll3_sw should be
> selected automatically when you need it, by setting ck01.

How/where can I do this?  As I understand it, the only place I can make
such a setup is in the device tree file as that's the only thing unique
for my board.

Thanks

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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