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path: root/drivers/usb/host/ehci-orion.c
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Diffstat (limited to 'drivers/usb/host/ehci-orion.c')
-rw-r--r--drivers/usb/host/ehci-orion.c16
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;
}