On Wed, Sep 03, 2014 at 10:03:39AM -0700, Mike Turquette wrote: > Quoting Leigh Brown (2014-09-03 07:40:56) > > On 2014-09-02 09:15, Gregory CLEMENT wrote: > > > Few users reported a timer drift on the Armada 370 based board such as > > > the mirabox or the Netgear ReadyNAS 102. This is the second series > > > with few improvements after the review of the 1st version. > > > > > > The reason is that when the SSCG (Spread Spectrum Clock Generator) is > > > enabled, it shifts the frequency of the clock. The percentage is no > > > more than 1% but when the clock is used for a timer it leads to a > > > clock drift. > > > > > > This series allows to correct the affected clock when the SSCG is > > > enabled. This drift can happen on all the mvebu SoC on the cpu clock > > > block (ie cpu, ddr and l2 cache). Currently the only notable effect is > > > for the Armada 370 because this SoC use the l2cache clock as source > > > for the timer. That's why even if the series allow any of the mvebu > > > SoC to benefit to this correction, Armada 370 is the only user of it. > > > > > > The first 2 patches should go through the clk subsystem, whereas the > > > third one should go to the arm-soc through the mvebu tree. > > > > > > The last one is just to fix a typo I found while I was reading the clk > > > code. > > > > This is working superbly for me on my Mirabox, and ntpd is now > > completely stable. > > > > Tested-by: Leigh Brown <[email protected]> > > > > Clock patches look good to me.
Ok, I'll pull it together into a clock branch and so forth. thx, Jason. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
