# Re: \[PATCH v7 5/5\] usb: dwc3: qcom: Modify interrupt handling for eUSB2 Phy targets

- From: Konrad Dybcio \<hidden\>
- Date: 2026-09-09 13:00:20 
- List: linux-phy
- Page: https://ratatoskr.run/linux-phy/2026/09/17538366
- Thread: https://ratatoskr.run/linux-phy/2026/09/17518831/t.md

```text
On 9/5/26 5:29 PM, Krishna Kurapati wrote:
> eUSB2 targets handle wakeup interrupts differently depending on device
> speed when operating in host mode.
> 
> According to the eUSB2 specification, remote wakeup signaling in host
> mode is detected via different data-line assertions based on the
> connected device speed.

[...]


> @@ -628,6 +649,7 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
>  	int			ret;
>  	bool			ignore_pipe_clk;
>  	bool			wakeup_source;
> +	struct phy		*phy;
>  
>  	qcom = devm_kzalloc(&pdev->dev, sizeof(*qcom), GFP_KERNEL);
>  	if (!qcom)
> @@ -698,6 +720,17 @@ static int dwc3_qcom_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto clk_disable;
>  
> +	phy = devm_of_phy_get_by_index(dev, dev->of_node, 0);
> +	if (IS_ERR(phy)) {
> +		if (PTR_ERR(phy) != -ENODEV) {

GPT reports:

When CONFIG_GENERIC_PHY is disabled, the stub in include/linux/phy/phy.h:489-493
returns ERR_PTR(-ENOSYS). The patch only treats -ENODEV as “no PHY”:

But it's not like one can really use this driver without a PHY..
We can add a follow-up to depend on that for the qcom driver

otherwise

Acked-by: Konrad Dybcio <redacted>

Konrad

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```