linux-kernel - Re: [PATCH 4/5] usb: dwc2: get optional clock by devm_clk_get

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Date:   Mon, 1 Apr 2019 08:47:47 +0000
From:   Minas Harutyunyan <minas.harutyunyan@...opsys.com>
To:     Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     Matthias Brugger <matthias.bgg@...il.com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        Minas Harutyunyan <minas.harutyunyan@...opsys.com>
Subject: Re: [PATCH 4/5] usb: dwc2: get optional clock by
 devm_clk_get_optional()

On 3/30/2019 1:28 PM, Chunfeng Yun wrote:
> 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>

> ---
>   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 */
>