1 files changed, 27 insertions, 9 deletions

diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c
index 831a04dd5a53..de67480d4f19 100644
--- a/drivers/usb/musb/davinci.c
+++ b/drivers/usb/musb/davinci.c
@@ -56,6 +56,7 @@
 struct davinci_glue {
         struct device           *dev;
         struct platform_device  *musb;
+        struct clk              *clk;
 };
 
 /* REVISIT (PM) we should be able to keep the PHY in low power mode most
@@ -395,8 +396,6 @@ static int davinci_musb_init(struct musb *musb)
 
         musb->mregs += DAVINCI_BASE_OFFSET;
 
-        clk_enable(musb->clock);
-
         /* returns zero if e.g. not clocked */
         revision = musb_readl(tibase, DAVINCI_USB_VERSION_REG);
         if (revision == 0)
@@ -451,8 +450,6 @@ static int davinci_musb_init(struct musb *musb)
         return 0;
 
 fail:
-        clk_disable(musb->clock);
-
         otg_put_transceiver(musb->xceiv);
         usb_nop_xceiv_unregister();
         return -ENODEV;
@@ -502,8 +499,6 @@ static int davinci_musb_exit(struct musb *musb)
 
         phy_off();
 
-        clk_disable(musb->clock);
-
         otg_put_transceiver(musb->xceiv);
         usb_nop_xceiv_unregister();
 
@@ -529,6 +524,7 @@ static int __init davinci_probe(struct platform_device *pdev)
         struct musb_hdrc_platform_data  *pdata = pdev->dev.platform_data;
         struct platform_device          *musb;
         struct davinci_glue             *glue;
+        struct clk                      *clk;
 
         int                             ret = -ENOMEM;
 
@@ -544,12 +540,26 @@ static int __init davinci_probe(struct platform_device *pdev)
                 goto err1;
         }
 
+        clk = clk_get(&pdev->dev, "usb");
+        if (IS_ERR(clk)) {
+                dev_err(&pdev->dev, "failed to get clock\n");
+                ret = PTR_ERR(clk);
+                goto err2;
+        }
+
+        ret = clk_enable(clk);
+        if (ret) {
+                dev_err(&pdev->dev, "failed to enable clock\n");
+                goto err3;
+        }
+
         musb->dev.parent                = &pdev->dev;
         musb->dev.dma_mask              = &davinci_dmamask;
         musb->dev.coherent_dma_mask     = davinci_dmamask;
 
         glue->dev                       = &pdev->dev;
         glue->musb                      = musb;
+        glue->clk                       = clk;
 
         pdata->platform_ops             = &davinci_ops;
 
@@ -559,23 +569,29 @@ static int __init davinci_probe(struct platform_device *pdev)
                         pdev->num_resources);
         if (ret) {
                 dev_err(&pdev->dev, "failed to add resources\n");
-                goto err2;
+                goto err4;
         }
 
         ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
         if (ret) {
                 dev_err(&pdev->dev, "failed to add platform_data\n");
-                goto err2;
+                goto err4;
         }
 
         ret = platform_device_add(musb);
         if (ret) {
                 dev_err(&pdev->dev, "failed to register musb device\n");
-                goto err2;
+                goto err4;
         }
 
         return 0;
 
+err4:
+        clk_disable(clk);
+
+err3:
+        clk_put(clk);
+
 err2:
         platform_device_put(musb);
 
@@ -592,6 +608,8 @@ static int __exit davinci_remove(struct platform_device *pdev)
 
         platform_device_del(glue->musb);
         platform_device_put(glue->musb);
+        clk_disable(glue->clk);
+        clk_put(glue->clk);
         kfree(glue);
 
         return 0;