Re: [PATCH 3/9] usb: dwc3: qcom: Add support for selecting UTMI as reference clock

[Varadarajan Narayanan <varadarajan.narayanan@oss.qualcomm.com>]

[...]
> diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
> index ac68b4218b56..17292517c594 100644
> --- a/drivers/usb/dwc3/dwc3-qcom.c
> +++ b/drivers/usb/dwc3/dwc3-qcom.c
> @@ -617,6 +617,8 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
>  	int			ret;
>  	bool			ignore_pipe_clk;
>  	bool			wakeup_source;
> +	bool			select_utmi_as_ref_clk;
> +	struct clk		*ref_clk;

Any reason why glue layer can't send the ref_clk_rate directly?

-Varada

>  	qcom = devm_kzalloc(&pdev->dev, sizeof(*qcom), GFP_KERNEL);
>  	if (!qcom)
> @@ -698,6 +700,18 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
>  			qcom->current_role = USB_ROLE_DEVICE;
>  	}
>
> +	select_utmi_as_ref_clk = device_property_read_bool(dev,
> +					"qcom,select-utmi-as-ref-clk");
> +	if (select_utmi_as_ref_clk) {
> +		ref_clk = devm_clk_get_optional(dev, "mock_utmi");
> +		if (IS_ERR(ref_clk)) {
> +			ret = PTR_ERR(ref_clk);
> +			dev_warn(dev, "failed to get ref clock: %d\n", ret);
> +		} else {
> +			probe_data.ref_clk = ref_clk;
> +		}
> +	}
> +
>  	qcom->dwc.glue_ops = &dwc3_qcom_glue_ops;
>
>  	qcom->dwc.dev = dev;
>
> --
> 2.53.0
>
>