[U-Boot] [PATCH v3 0/6] ARM: kirkwood: mvebu_mmc: Speed up access time

[Mario Schuknecht]

2014-12-13 21:35 GMT+01:00 Gérald Kerma <drEagle at 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
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