diff mbox series

[v3,4/6] usb: dwc2: get optional clock by devm_clk_get_optional()

Message ID 39be1493f7760c3c06858046f64d02e7cb86884e.1555488276.git.chunfeng.yun@mediatek.com (mailing list archive)
State Mainlined
Commit 60722c4eefbc9acddaf5e641f6dfb24bce930f9a
Headers show
Series [v3,1/6] usb: xhci-mtk: get optional clock by devm_clk_get_optional() | expand

Commit Message

Chunfeng Yun (云春峰) April 17, 2019, 8:28 a.m. UTC 
When the driver tries to get optional clock, it ignores all errors,
but if only ignores -ENOENT, it will cover some real errors, such as
-EPROBE_DEFER, so use devm_clk_get_optional() to get optional clock.

Cc: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Acked-by: Minas Harutyunyan <hminas@synopsys.com>
---
v3: modify changelog comment
v2: add Acked-by Minas Harutyunyan
---
 drivers/usb/dwc2/platform.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

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 */