]> Git Repo - J-u-boot.git/commit
MMC: DWMMC: Fix FIFO_DEPTH calculation
authorRajeshwari Shinde <[email protected]>
Fri, 24 May 2013 12:45:34 +0000 (18:15 +0530)
committerMinkyu Kang <[email protected]>
Mon, 17 Jun 2013 02:03:42 +0000 (11:03 +0900)
commited7bdc03eb516fb698ccc12ec5b4b9f132d05c5f
treea77142276a7ad943fd02b3dd303cd5b42a22edbe
parenteeb7d6a238f42c5c87892f9849cea00725f6d2d5
MMC: DWMMC: Fix FIFO_DEPTH calculation

Current DWMMC driver used to give FIFO underrun/overrun error every 3rd time
for mmc rescan command.
In current code FIFO_DEPTH is getting calculated after reading the default FIFOTH
register and extracting the RX_WMARK bits from it i.e (RX_WMARK = FIFO_DEPTH/2 -1).
Instead of storing the correct value, we were recalculating the FIFO_DEPT each
time which is not correct.

Based on "[PATCH V9 3/9] DWMMC: Initialise dwmci and resolve EMMC read write issues"
http://permalink.gmane.org/gmane.comp.boot-loaders.u-boot/160247

Signed-off-by: Hatim Ali <[email protected]>
Signed-off-by: Rajeshwari Shinde <[email protected]>
Acked-by: Simon Glass <[email protected]>
Tested-by: Simon Glass <[email protected]>
Acked-by: Jaehoon Chung <[email protected]>
Acked-by: Andy Fleming <[email protected]>
Signed-off-by: Minkyu Kang <[email protected]>
drivers/mmc/dw_mmc.c
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