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-rw-r--r--drivers/mmc/host/mmci.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index fef7140eb1d..56e9a416826 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1184,7 +1184,15 @@ static int __devinit mmci_probe(struct amba_device *dev,
}
mmc->ops = &mmci_ops;
- mmc->f_min = (host->mclk + 511) / 512;
+ /*
+ * The ARM and ST versions of the block have slightly different
+ * clock divider equations which means that the minimum divider
+ * differs too.
+ */
+ if (variant->st_clkdiv)
+ mmc->f_min = DIV_ROUND_UP(host->mclk, 257);
+ else
+ mmc->f_min = DIV_ROUND_UP(host->mclk, 512);
/*
* If the platform data supplies a maximum operating
* frequency, this takes precedence. Else, we fall back