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Commit ca12cb7c authored by Chunfeng Yun's avatar Chunfeng Yun Committed by Greg Kroah-Hartman
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usb: mtu3: make the reference clock optional 



Make the reference clock optional for DTS backward compatibility
and ignore the error if it does not exist.

Signed-off-by: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent cb6efc7b

drivers/usb/mtu3/mtu3_plat.c

+9 −2
Original line number Diff line number Diff line
@@ -225,10 +225,17 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb) 
		return PTR_ERR(ssusb->sys_clk);

	}



	/*

	 * reference clock is usually a "fixed-clock", make it optional

	 * for backward compatibility and ignore the error if it does

	 * not exist.

	 */

	ssusb->ref_clk = devm_clk_get(dev, "ref_ck");

	if (IS_ERR(ssusb->ref_clk)) {

		dev_err(dev, "failed to get ref clock\n");

		return PTR_ERR(ssusb->ref_clk);

		if (PTR_ERR(ssusb->ref_clk) == -EPROBE_DEFER)

			return -EPROBE_DEFER;



		ssusb->ref_clk = NULL;

	}



	ssusb->num_phys = of_count_phandle_with_args(node,