[PATCH 3/6] clk: bcm2835: enable clocks that have been enabled by firmware

[Eric Anholt]

kernel at martin.sperl.org writes:

> From: Martin Sperl <kernel at martin.sperl.org>
>
> If a clock that has been enabled by the firmware gets disabled
> by a driver this may right now result in a crash of the system
> as then also the corresponding PLL_dividers as well as PLLs
> get disabled (if not used) - some of which are used by the
> VideoCore GPU (which also runs the firmware)
>
> This patch prepares/enables those clocks that have been
> configured by the firmware.
>
> Whenever the clock framework implements either
> CLK_IS_CRITICAL or HAND_OFF this can get changed to use this
> new mechanism.
>
> For this to be completely successful (i.e not missing a clock
> and subsequently a pll) it is recommended to add all the known
> clocks of the soc so that this can get applied to all clocks.

I think this makes sense to have, for now at least.

Reviewed-by: Eric Anholt <eric at anholt.net>
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