[PATCH 4/5] usb: dwc2: get optional clock by devm_clk_get_optional()

[Chunfeng Yun]

Use devm_clk_get_optional() to get optional clock

Cc: Minas Harutyunyan <hminas@xxxxxxxxxxxx>
Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
---
 drivers/usb/dwc2/platform.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index c0b64d483552..9aa9682a5cd2 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -284,10 +284,10 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
 	}
 
 	/* Clock */
-	hsotg->clk = devm_clk_get(hsotg->dev, "otg");
+	hsotg->clk = devm_clk_get_optional(hsotg->dev, "otg");
 	if (IS_ERR(hsotg->clk)) {
-		hsotg->clk = NULL;
-		dev_dbg(hsotg->dev, "cannot get otg clock\n");
+		dev_err(hsotg->dev, "cannot get otg clock\n");
+		return PTR_ERR(hsotg->clk);
 	}
 
 	/* Regulators */
-- 
2.20.1