tree 1270d542e8e13e1399be7a4e7cc42ebf2ef29c31
parent ecd94dd59c9eca85079ac124db676f0629e3be89
author Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com> 1509311338 +0100
committer Stefano Babic <sbabic@denx.de> 1510046787 +0100

mmc: fsl_esdhc: Fix PIO timeout

The following error has been observed on i.MX25 with a high-speed SDSC
card:
    Data Write Failed in PIO Mode.

It was caused by the timeout set on PRSSTAT.BWEN, which was triggered
because this bit takes 15 ms to be set after writing the first block to
DATPORT with this card. Without this timeout, all the blocks are
properly written.

This timeout was implemented by decrementing a variable, so it was
depending on the CPU frequency. Fix this issue by setting this timeout
to a long enough absolute duration (500 ms).

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>