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authorKumar Gala <galak@kernel.crashing.org>2011-01-29 15:36:10 -0600
committerKumar Gala <galak@kernel.crashing.org>2011-02-03 02:46:12 -0600
commit5103a03a0be2fd1a5270046d9f2bc77916e33a56 (patch)
tree969486ff9a138e255386e4767525027454235448 /drivers/mmc
parent6e7f0bc0ce33adbd028f4e34b7e9d3bf46e0f95b (diff)
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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>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/fsl_esdhc.c5
1 files changed, 5 insertions, 0 deletions
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 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
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;