i.MX28: Lower the amount of blocks transfered in one DMA cycle
Some MMC cards, like my ancient 32.0MB SanDisk RS-MMC cards had issue if b_max
was set to 0x40 and DMA was enabled. Lower this value to 0x20, which allows
these cards to work too.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Detlev Zundel <dzu@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
diff --git a/drivers/mmc/mxsmmc.c b/drivers/mmc/mxsmmc.c
index 35c6bda..6572e95 100644
--- a/drivers/mmc/mxsmmc.c
+++ b/drivers/mmc/mxsmmc.c
@@ -406,7 +406,7 @@
*/
mmc->f_min = 400000;
mmc->f_max = mxc_get_clock(MXC_SSP0_CLK + id) * 1000 / 2;
- mmc->b_max = 0x40;
+ mmc->b_max = 0x20;
mmc_register(mmc);
return 0;