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usb: dwc2: get optional clock by devm_clk_get_optional() 

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2019-04-17 16:28:19 +08:00 committed by Greg Kroah-Hartman
parent bbe2028f43
commit e894cdc2cb
1 changed files with 3 additions and 3 deletions
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6
drivers/usb/dwc2/platform.c
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@ -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 */