[PATCH] ARM: dts: Specify default clocks for Exynos4 FIMC devices

Daniel Drake drake at endlessm.com
Thu Sep 25 12:44:30 PDT 2014


On Thu, Sep 25, 2014 at 12:05 PM, Sylwester Nawrocki
<s.nawrocki at samsung.com> wrote:
>> Just curious about the Exynos4x12 situation here.
>> You set the FIMC clocks as 176MHz, child of MPLL, which works for
>> ODROID with a divider:
>>
>> 880MHz MPLL / 5 = 176MHz
>>
>> However, talking of recommended frequencies... Is 880MHz really the
>> standard there?
>> Isn't 800MHz the more common one?
>
> AFAIK 880 MHz is recommended MPLL frequency for Exynos4412 EVT2.0, which
> is revision of the Exynos4412 SoC the Odroid U3 boards are populated with.
> You can read the main/sub revision information from the chip ID register
> (at 0x10000000).

Thanks for the information. Might be worth a quick comment in
exynos4x12.dtsi then, saying that the defaults here are for Exynos4412
EVT2.0 and might want to be overridden for other versions of the SoC.

Thanks
Daniel



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