mxcmmc: decrease minimum frequency to make MMC cards work

This is a temporary workaround until the MMC stack can be fixed.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Pierre Ossman <pierre@ossman.eu>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index b4a615c55f28..5950102113f4 100644
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -724,7 +724,9 @@ static int mxcmci_probe(struct platform_device *pdev)
                 goto out_clk_put;
         }
 
-        mmc->f_min = clk_get_rate(host->clk) >> 7;
+        mmc->f_min = clk_get_rate(host->clk) >> 16;
+        if (mmc->f_min < 400000)
+                mmc->f_min = 400000;
         mmc->f_max = clk_get_rate(host->clk) >> 1;
 
         /* recommended in data sheet */