2014-12-13 21:35 GMT+01:00 Gérald Kerma <drea...@doukki.net>: > > > This serie of patches speed up access time of MVEBUMMC driver > > This is allowed by a fix in MVEBUMMC init status check inspired from linux > MVSDIO driver. > * Hardware weirdness. The FIFO_EMPTY bit of the HW_STATE > * register is sometimes not set before a while when some > * "unusual" data block sizes are used (such as with the SWITCH > * command), even despite the fact that the XFER_DONE interrupt > * was raised. And if another data transfer starts before > * this bit comes to good sense (which eventually happens by > * itself) then the new transfer simply fails with a timeout. > > It allows about 10x to 40x faster access time transfer on SHEEVAPLUG MMC > It may also fixes some SD types incompatibilities > > ### before patch > > Marvell>> ext2load mmc 0:1 0x800000 uImage > 1613392 bytes read in 977 ms (1.6 MiB/s) > > ### with fix > > Marvell>> ext2load mmc 0:1 0x800000 uImage > 1613392 bytes read in 83 ms (18.5 MiB/s) > > > Looks good to me. ACK to this series of patches:
> Gérald Kerma (6): > MVEBUMMC : Change copyright date > MVEBUMMC : Speed up access time > MVEBUMMC : FIX debug strings > MVEBUMMC : REMOVE unnecessary delays > MVEBUMMC : CLEAN code > MVEBUMMC : REMOVE unnecessary delay from init > drivers/mmc/mvebu_mmc.c | 103 > ++++++++++++++++++++++++++++-------------------- > include/mvebu_mmc.h | 1 + > 2 files changed, 61 insertions(+), 43 deletions(-) > > -- > 2.1.3 > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot >
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