[PATCH 2/2] ARM: omap5/dra7xx: Fix counter frequency drift for AM572x errata i856.

Lennart Sorensen lsorense at csclub.uwaterloo.ca
Wed Dec 17 07:49:11 PST 2014

On Wed, Dec 17, 2014 at 05:45:05PM +0200, Tero Kristo wrote:
> Yea clock mux can be used. However, we don't have support for DRA7
> control module clocks in the DT yet. I have posted patches with
> support towards this a couple of weeks back, but they need some
> revising.
> Thus, we maybe need to apply the timer patches as is for now, and
> fix the clock tree a bit later.

Certainly the patches so far fix the system time issue.  I don't think
anything else in the clock tree using this clock is that picky about
the clock being of by 0.05% (when using 20MHz SYSCLK1, which I believe
all boards so far do, other than the one board on my desk with a 19.2MHz
clock because we wanted to see what happened).  Certainly if someone
does build a baord using either 19.2 or 27MHz as supported in the
documentation, then it becomes more relevant potentially.

But I certainly don't consider fixing the clock tree urgent.  I think
we can start shipping products with the clock tree in the current state
(but we couldn't with the system time being that bad, which the patches
so far fix).

Len Sorensen

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