commit 5103a03a0be2fd1a5270046d9f2bc77916e33a56
author Kumar Gala <galak@kernel.crashing.org> Sat Jan 29 15:36:10 2011 -0600
committer Kumar Gala <galak@kernel.crashing.org> Thu Feb 03 02:46:12 2011 -0600
tree 969486ff9a138e255386e4767525027454235448
parent 6e7f0bc0ce33adbd028f4e34b7e9d3bf46e0f95b

fsl_esdhc: Add the workaround for erratum ESDHC-A001 (enable on P2020)

Data timeout counter (SYSCTL[DTOCV]) is not reliable for values of 4, 8,
and 12. Program one more than the desired value: 4 -> 5, 8 -> 9, 12 -> 13.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

drivers/mmc/fsl_esdhc.c

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index d01c926..f3cccbe 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -219,6 +219,11 @@
 	if (timeout < 0)
 		timeout = 0;
 
+#ifdef CONFIG_SYS_FSL_ERRATUM_ESDHC_A001
+	if ((timeout == 4) || (timeout == 8) || (timeout == 12))
+		timeout++;
+#endif
+
 	esdhc_clrsetbits32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
 
 	return 0;