[PATCH 2/2] clk: bcm2835: expose current divider, parent and mash via debugfs

[Eric Anholt]

kernel at martin.sperl.org writes:

> From: Martin Sperl <kernel at martin.sperl.org>
>
> For each clock expose the following values via debugfs:
> * current_parent - the currently selected parent
> * current_divi - the integer portion of the currently set divider
> * current_divf - the fractional portion of the currently set divider
> * current_frac - the current frac/mash settings for the divider

current_parent can already be found through /debug/clk/clk_summary quite
nicely I think.  If we wanted a per-clock parent file, that seems like
something the core ought to be doing.

current_frac is looking at a bit that doesn't exist for non-MASH clocks.

divi/divf are OK, I guess, but don't seem particularly useful given the
raw register output already.  A cooked floating point point divider
debugfs entry would be nice, but I don't know if we can do that.
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