On Mon, 9 Dec 2013 12:19:25 -0300 Emilio López <[email protected]> wrote:
> Hi all, > > This series adds support for 400MHz MBUS on A20 hardware, when using the > FAST_MBUS flag on board configuration. The dcdc3 voltage needs to be > increased for stability, as confirmed by Allwinner [1]. > > This series has been tested on 50 pieces of Cubieboard2 and was found to > be stable. Thanks Cubietech! :) > > This should ideally work fine for all A20 boards, but I will let people > with actual hardware verify it is indeed the case before flipping the > switch. > > Cheers, > > Emilio > > [1] http://irclog.whitequark.org/linux-sunxi/2013-11-06#5472723; > > Emilio López (3): > sunxi: fix CCM MBUS N factor interpretation > sunxi: fast MBUS support on sun7i > sunxi: enable 400MHz MBUS on Cubieboard2 and Cubietruck > > arch/arm/cpu/armv7/sunxi/dram.c | 12 +++++++++--- > arch/arm/include/asm/arch-sunxi/clock.h | 2 +- > board/sunxi/board.c | 4 ++++ > boards.cfg | 8 ++++---- > 4 files changed, 18 insertions(+), 8 deletions(-) Looks good. Not sure if my testing means anything though (my hardware seems to be able to handle quite a moderate overclocking just fine, not only 400MHz MBUS, but higher and even without increasing the voltage). But let's see if this improves reliability of clocking dram at 480MHz on cubieboard2 hardware for the other users. It makes sense to ask the people, who have been experiencing problems earlier, to re-run their tests. -- Best regards, Siarhei Siamashka -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
