The devm_clk_get_enabled() helpers: - call devm_clk_get() - call clk_prepare_enable() and register what is needed in order to call clk_disable_unprepare() when needed, as a managed resource. This simplifies the code and avoids calls to clk_disable_unprepare(). Signed-off-by: Lei Liu <liulei.rjpt@xxxxxxxx> --- drivers/usb/gadget/udc/r8a66597-udc.c | 16 ++++------------ 1 file changed, 4 insertions(+), 12 deletions(-) diff --git a/drivers/usb/gadget/udc/r8a66597-udc.c b/drivers/usb/gadget/udc/r8a66597-udc.c index db4a10a979f9..bdbe5ead741e 100644 --- a/drivers/usb/gadget/udc/r8a66597-udc.c +++ b/drivers/usb/gadget/udc/r8a66597-udc.c @@ -1812,10 +1812,6 @@ static void r8a66597_remove(struct platform_device *pdev) usb_del_gadget_udc(&r8a66597->gadget); del_timer_sync(&r8a66597->timer); r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req); - - if (r8a66597->pdata->on_chip) { - clk_disable_unprepare(r8a66597->clk); - } } static void nop_completion(struct usb_ep *ep, struct usb_request *r) @@ -1876,18 +1872,17 @@ static int r8a66597_probe(struct platform_device *pdev) if (r8a66597->pdata->on_chip) { snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id); - r8a66597->clk = devm_clk_get(dev, clk_name); + r8a66597->clk = devm_clk_get_enabled(dev, clk_name); if (IS_ERR(r8a66597->clk)) { dev_err(dev, "cannot get clock \"%s\"\n", clk_name); return PTR_ERR(r8a66597->clk); } - clk_prepare_enable(r8a66597->clk); } if (r8a66597->pdata->sudmac) { ret = r8a66597_sudmac_ioremap(r8a66597, pdev); if (ret < 0) - goto clean_up2; + goto err_add_udc; } disable_controller(r8a66597); /* make sure controller is disabled */ @@ -1896,7 +1891,7 @@ static int r8a66597_probe(struct platform_device *pdev) udc_name, r8a66597); if (ret < 0) { dev_err(dev, "request_irq error (%d)\n", ret); - goto clean_up2; + goto err_add_udc; } INIT_LIST_HEAD(&r8a66597->gadget.ep_list); @@ -1939,7 +1934,7 @@ static int r8a66597_probe(struct platform_device *pdev) GFP_KERNEL); if (r8a66597->ep0_req == NULL) { ret = -ENOMEM; - goto clean_up2; + goto err_add_udc; } r8a66597->ep0_req->complete = nop_completion; @@ -1952,9 +1947,6 @@ static int r8a66597_probe(struct platform_device *pdev) err_add_udc: r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req); -clean_up2: - if (r8a66597->pdata->on_chip) - clk_disable_unprepare(r8a66597->clk); if (r8a66597->ep0_req) r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req); -- 2.34.1