usb: ohci-nxp: Use helper function devm_clk_get_enabled()

devm_clk_get() and clk_prepare_enable() can be replaced by helper
function devm_clk_get_enabled(). Let's use devm_clk_get_enabled() to
simplify code and avoid calling clk_disable_unprepare().

Signed-off-by: Zhang Zekun <[e-mail]>
Acked-by: Alan Stern <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/host/ohci-nxp.c

···
 
 static struct i2c_client *isp1301_i2c_client;
 
-static struct clk *usb_host_clk;
-
 static void isp1301_configure_lpc32xx(void)
 {
 	/* LPC32XX only supports DAT_SE0 USB mode */
···
 	struct resource *res;
 	int ret = 0, irq;
 	struct device_node *isp1301_node;
+	struct clk *usb_host_clk;
 
 	if (pdev->dev.of_node) {
 		isp1301_node = of_parse_phandle(pdev->dev.of_node,
···
 	}
 
 	/* Enable USB host clock */
-	usb_host_clk = devm_clk_get(&pdev->dev, NULL);
+	usb_host_clk = devm_clk_get_enabled(&pdev->dev, NULL);
 	if (IS_ERR(usb_host_clk)) {
-		dev_err(&pdev->dev, "failed to acquire USB OHCI clock\n");
+		dev_err(&pdev->dev, "failed to acquire and start USB OHCI clock\n");
 		ret = PTR_ERR(usb_host_clk);
-		goto fail_disable;
-	}
-
-	ret = clk_prepare_enable(usb_host_clk);
-	if (ret < 0) {
-		dev_err(&pdev->dev, "failed to start USB OHCI clock\n");
 		goto fail_disable;
 	}
 
···
 	if (!hcd) {
 		dev_err(&pdev->dev, "Failed to allocate HC buffer\n");
 		ret = -ENOMEM;
-		goto fail_hcd;
+		goto fail_disable;
 	}
 
 	hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
···
 	ohci_nxp_stop_hc();
 fail_resource:
 	usb_put_hcd(hcd);
-fail_hcd:
-	clk_disable_unprepare(usb_host_clk);
 fail_disable:
 	isp1301_i2c_client = NULL;
 	return ret;
···
 	usb_remove_hcd(hcd);
 	ohci_nxp_stop_hc();
 	usb_put_hcd(hcd);
-	clk_disable_unprepare(usb_host_clk);
 	isp1301_i2c_client = NULL;
 }