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

Daniel Drake drake at endlessm.com
Thu Sep 18 12:27:29 PDT 2014

Hi Sylwester,

On Wed, Sep 10, 2014 at 10:37 AM, Sylwester Nawrocki
<s.nawrocki at samsung.com> wrote:
> The default mux and divider clocks are specified in device tree
> so that the FIMC devices in Exynos4210 and Exynos4x12 SoCs are
> clocked from recommended clock source and with maximum supported
> frequency. If needed these settings could be overrode in board
> specific dts files, however they are in practice optimal in most
> cases.

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?

Also, if you happen to know, I would be curious about the equivalent
and recommended situation for the sclk_mfc clock. On the vendor kernel
it is clocked at 880/4 = 220MHz. When booting mainline on an odroid it
is 880/16 = 55MHz :/


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