1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/mmc/host/mvsdio.c b/drivers/mmc/host/mvsdio.c
index eeb8cd125b0c..3b9136c1a475 100644
--- a/drivers/mmc/host/mvsdio.c
+++ b/drivers/mmc/host/mvsdio.c
@@ -19,6 +19,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/scatterlist.h>
 #include <linux/irq.h>
+#include <linux/clk.h>
 #include <linux/gpio.h>
 #include <linux/mmc/host.h>
 
@@ -51,6 +52,7 @@ struct mvsd_host {
         struct device *dev;
         struct resource *res;
         int irq;
+        struct clk *clk;
         int gpio_card_detect;
         int gpio_write_protect;
 };
@@ -770,6 +772,13 @@ static int __init mvsd_probe(struct platform_device *pdev)
         } else
                 host->irq = irq;
 
+        /* Not all platforms can gate the clock, so it is not
+           an error if the clock does not exists. */
+        host->clk = clk_get(&pdev->dev, NULL);
+        if (!IS_ERR(host->clk)) {
+                clk_prepare_enable(host->clk);
+        }
+
         if (mvsd_data->gpio_card_detect) {
                 ret = gpio_request(mvsd_data->gpio_card_detect,
                                    DRIVER_NAME " cd");
@@ -854,6 +863,11 @@ static int __exit mvsd_remove(struct platform_device *pdev)
                 mvsd_power_down(host);
                 iounmap(host->base);
                 release_resource(host->res);
+
+                if (!IS_ERR(host->clk)) {
+                        clk_disable_unprepare(host->clk);
+                        clk_put(host->clk);
+                }
                 mmc_free_host(mmc);
         }
         platform_set_drvdata(pdev, NULL);