[PATCH v2 1/8] clk: rockchip: Allow more precision for some mmc clock phases
heiko at sntech.de
Thu Oct 22 06:47:20 PDT 2015
Am Donnerstag, 22. Oktober 2015, 05:03:26 schrieb Michael Turquette:
> Quoting Heiko Stuebner (2015-09-30 07:07:37)
> > From: Douglas Anderson <dianders at chromium.org>
> > Because of the inexact nature of the extra MMC delay elements (it's
> > not possible to keep the phase monotonic and to also make phases (mod
> > 90) > 70), we previously only allowed phases (mod 90) of 22.5, 45,
> > and 67.5.
> > But it's not the end of the world if the MMC clock phase goes
> > non-monotonic. At most we'll be 25 degrees off. It's way better to
> > test more phases to look for bad ones than to be 25 degrees off, because
> > in the case of MMC really the point is to find bad phases and get as far
> > asway from the as possible. If we get to test extra phases by going
> > slightly non-monotonic then that might be fine. Worst case we would
> > end up at a phases that's slight differnt than the one we wanted, but
> > at least we'd still be quite far away from the a bad phase.
> > Signed-off-by: Douglas Anderson <dianders at chromium.org>
> > Fold in more precise variance-values of 44-77 instead of 40-80.
> > Fold in the actual removal of the monotonic requirement and adapt
> > patch message accordingly.
> > Signed-off-by: Heiko Stuebner <heiko at sntech.de>
> Looks good to me. What tree do you want this to go through?
we got already an Ack from Stephen [in the thread of patch3] for the clock
patches and they are already in the mmc.tree .
More information about the linux-arm-kernel