[PATCH 1/2] usb: dwc3: Use helper function devm_clk_get_enabled()

[Zhang Zekun <zhangzekun11@xxxxxxxxxx>]

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 <zhangzekun11@xxxxxxxxxx>
---
 drivers/usb/dwc3/dwc3-imx8mp.c | 47 ++++++++--------------------------
 1 file changed, 11 insertions(+), 36 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-imx8mp.c b/drivers/usb/dwc3/dwc3-imx8mp.c
index 392fa1232788..a7e5ee797ae7 100644
--- a/drivers/usb/dwc3/dwc3-imx8mp.c
+++ b/drivers/usb/dwc3/dwc3-imx8mp.c
@@ -178,37 +178,20 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev)
 			return PTR_ERR(dwc3_imx->glue_base);
 	}
 
-	dwc3_imx->hsio_clk = devm_clk_get(dev, "hsio");
-	if (IS_ERR(dwc3_imx->hsio_clk)) {
-		err = PTR_ERR(dwc3_imx->hsio_clk);
-		dev_err(dev, "Failed to get hsio clk, err=%d\n", err);
-		return err;
-	}
+	dwc3_imx->hsio_clk = devm_clk_get_enabled(dev, "hsio");
+	if (IS_ERR(dwc3_imx->hsio_clk))
+		return dev_err_probe(dev, PTR_ERR(dwc3_imx->hsio_clk),
+				     "Failed to get and enable hsio clk\n");
 
-	err = clk_prepare_enable(dwc3_imx->hsio_clk);
-	if (err) {
-		dev_err(dev, "Failed to enable hsio clk, err=%d\n", err);
-		return err;
-	}
-
-	dwc3_imx->suspend_clk = devm_clk_get(dev, "suspend");
-	if (IS_ERR(dwc3_imx->suspend_clk)) {
-		err = PTR_ERR(dwc3_imx->suspend_clk);
-		dev_err(dev, "Failed to get suspend clk, err=%d\n", err);
-		goto disable_hsio_clk;
-	}
-
-	err = clk_prepare_enable(dwc3_imx->suspend_clk);
-	if (err) {
-		dev_err(dev, "Failed to enable suspend clk, err=%d\n", err);
-		goto disable_hsio_clk;
-	}
+	dwc3_imx->suspend_clk = devm_clk_get_enabled(dev, "suspend");
+	if (IS_ERR(dwc3_imx->suspend_clk))
+		return dev_err_probe(dev, PTR_ERR(dwc3_imx->suspend_clk),
+				     "Failed to get and enable suspend clk\n");
 
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0) {
-		err = irq;
-		goto disable_clks;
-	}
+	if (irq < 0)
+		return irq;
+
 	dwc3_imx->irq = irq;
 
 	imx8mp_configure_glue(dwc3_imx);
@@ -259,25 +242,17 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev)
 disable_rpm:
 	pm_runtime_disable(dev);
 	pm_runtime_put_noidle(dev);
-disable_clks:
-	clk_disable_unprepare(dwc3_imx->suspend_clk);
-disable_hsio_clk:
-	clk_disable_unprepare(dwc3_imx->hsio_clk);
 
 	return err;
 }
 
 static void dwc3_imx8mp_remove(struct platform_device *pdev)
 {
-	struct dwc3_imx8mp *dwc3_imx = platform_get_drvdata(pdev);
 	struct device *dev = &pdev->dev;
 
 	pm_runtime_get_sync(dev);
 	of_platform_depopulate(dev);
 
-	clk_disable_unprepare(dwc3_imx->suspend_clk);
-	clk_disable_unprepare(dwc3_imx->hsio_clk);
-
 	pm_runtime_disable(dev);
 	pm_runtime_put_noidle(dev);
 }
-- 
2.17.1