1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 7721de942c69..c471cdb1a0ba 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1061,7 +1061,15 @@ 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