1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index 6c6a5a3b4ea7..82de1073aa52 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/mbus.h>
+#include <linux/clk.h>
 #include <plat/ehci-orion.h>
 
 #define rdl(off)        __raw_readl(hcd->regs + (off))
@@ -198,6 +199,7 @@ static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)
         struct resource *res;
         struct usb_hcd *hcd;
         struct ehci_hcd *ehci;
+        struct clk *clk;
         void __iomem *regs;
         int irq, err;
 
@@ -238,6 +240,14 @@ static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)
                 goto err2;
         }
 
+        /* Not all platforms can gate the clock, so it is not
+           an error if the clock does not exists. */
+        clk = clk_get(&pdev->dev, NULL);
+        if (!IS_ERR(clk)) {
+                clk_prepare_enable(clk);
+                clk_put(clk);
+        }
+
         hcd = usb_create_hcd(&ehci_orion_hc_driver,
                         &pdev->dev, dev_name(&pdev->dev));
         if (!hcd) {
@@ -301,12 +311,18 @@ err1:
 static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
 {
         struct usb_hcd *hcd = platform_get_drvdata(pdev);
+        struct clk *clk;
 
         usb_remove_hcd(hcd);
         iounmap(hcd->regs);
         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
         usb_put_hcd(hcd);
 
+        clk = clk_get(&pdev->dev, NULL);
+        if (!IS_ERR(clk)) {
+                clk_disable_unprepare(clk);
+                clk_put(clk);
+        }
         return 0;
 }