[PATCH 3/5] usb: r8a66597-udc: Use devm_clk_get_enabled() helpers

[Lei Liu]

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 at vivo.com>
---
 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