3 files changed, 13 insertions, 1 deletions

diff --git a/drivers/mmc/host/sdhci-of.c b/drivers/mmc/host/sdhci-of.c
index d79fa55c3b8..908844327db 100644
--- a/drivers/mmc/host/sdhci-of.c
+++ b/drivers/mmc/host/sdhci-of.c
@@ -158,6 +158,13 @@ static unsigned int esdhc_get_max_clock(struct sdhci_host *host)
         return of_host->clock;
 }
 
+static unsigned int esdhc_get_min_clock(struct sdhci_host *host)
+{
+        struct sdhci_of_host *of_host = sdhci_priv(host);
+
+        return of_host->clock / 256 / 16;
+}
+
 static unsigned int esdhc_get_timeout_clock(struct sdhci_host *host)
 {
         struct sdhci_of_host *of_host = sdhci_priv(host);
@@ -184,6 +191,7 @@ static struct sdhci_of_data sdhci_esdhc = {
                 .set_clock = esdhc_set_clock,
                 .enable_dma = esdhc_enable_dma,
                 .get_max_clock = esdhc_get_max_clock,
+                .get_min_clock = esdhc_get_min_clock,
                 .get_timeout_clock = esdhc_get_timeout_clock,
         },
 };
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 6779b4ecab1..62041c7e924 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1766,7 +1766,10 @@ int sdhci_add_host(struct sdhci_host *host)
          * Set host parameters.
          */
         mmc->ops = &sdhci_ops;
-        mmc->f_min = host->max_clk / 256;
+        if (host->ops->get_min_clock)
+                mmc->f_min = host->ops->get_min_clock(host);
+        else
+                mmc->f_min = host->max_clk / 256;
         mmc->f_max = host->max_clk;
         mmc->caps = MMC_CAP_SDIO_IRQ;
 
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 831ddf7dcb4..c77e9ff3022 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -302,6 +302,7 @@ struct sdhci_ops {
 
         int             (*enable_dma)(struct sdhci_host *host);
         unsigned int    (*get_max_clock)(struct sdhci_host *host);
+        unsigned int    (*get_min_clock)(struct sdhci_host *host);
         unsigned int    (*get_timeout_clock)(struct sdhci_host *host);
 };