linux-kernel - [v2 PATCH 4/6] usb: dwc2: get optional clock by devm_clk_get

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Message-ID: <80836043f845d6afcdfe20adae5cfdd69a9c2a7f.1554877692.git.chunfeng.yun@mediatek.com>
Date:   Wed, 10 Apr 2019 14:47:27 +0800
From:   Chunfeng Yun <chunfeng.yun@...iatek.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     Mathias Nyman <mathias.nyman@...el.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        Minas Harutyunyan <hminas@...opsys.com>
Subject: [v2 PATCH 4/6] usb: dwc2: get optional clock by devm_clk_get_optional()

Use devm_clk_get_optional() to get optional clock

Cc: Minas Harutyunyan <hminas@...opsys.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
Acked-by: Minas Harutyunyan <hminas@...opsys.com>
---
v2: add Acked-by Minas Harutyunyan
---
 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 */
-- 
2.21.0