Re: [PATCH v2 4/6] usb: chipidea: imx: add wakeup interrupt handling

[Peter Chen <peter.chen@kernel.org>]

On 25-02-25 13:39:53, Xu Yang wrote:
> In previous imx platform, normal USB controller interrupt and wakeup
> interrupt are bound to one irq line. However, it changes on latest
> i.MX95 platform since it has a dedicated irq line for wakeup interrupt.
> This will add wakeup interrupt handling for i.MX95 to support various
> wakeup events.
> 
> Signed-off-by: Xu Yang <xu.yang_2@nxp.com>

Please fix the build error, and others are okay for me.

Peter
> ---
> Changes in v2:
>  - rename irq to wakeup_irq
>  - disable irq by default
>  - enable irq when suspend, disable irq when resume
> ---
>  drivers/usb/chipidea/ci_hdrc_imx.c | 32 ++++++++++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
> 
> diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_hdrc_imx.c
> index 1a7fc638213e..b36fc8c19748 100644
> --- a/drivers/usb/chipidea/ci_hdrc_imx.c
> +++ b/drivers/usb/chipidea/ci_hdrc_imx.c
> @@ -98,6 +98,7 @@ struct ci_hdrc_imx_data {
>  	struct clk *clk;
>  	struct clk *clk_wakeup;
>  	struct imx_usbmisc_data *usbmisc_data;
> +	int wakeup_irq;
>  	bool supports_runtime_pm;
>  	bool override_phy_control;
>  	bool in_lpm;
> @@ -336,6 +337,16 @@ static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event)
>  	return ret;
>  }
>  
> +static irqreturn_t ci_wakeup_irq_handler(int irq, void *data)
> +{
> +	struct ci_hdrc_imx_data *imx_data = data;
> +
> +	disable_irq_nosync(irq);
> +	pm_runtime_resume(&imx_data->ci_pdev->dev);
> +
> +	return IRQ_HANDLED;
> +}
> +
>  static int ci_hdrc_imx_probe(struct platform_device *pdev)
>  {
>  	struct ci_hdrc_imx_data *data;
> @@ -476,6 +487,16 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
>  	if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
>  		data->supports_runtime_pm = true;
>  
> +	data->wakeup_irq = platform_get_irq_optional(pdev, 1);
> +	if (data->wakeup_irq > 0) {
> +		ret = devm_request_threaded_irq(dev, data->wakeup_irq,
> +				NULL, ci_wakeup_irq_handler,
> +				IRQF_ONESHOT | IRQF_NO_AUTOEN,
> +				pdata.name, data);
> +		if (ret)
> +			goto err_clk;
> +	}
> +
>  	ret = imx_usbmisc_init(data->usbmisc_data);
>  	if (ret) {
>  		dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
> @@ -584,6 +605,7 @@ static int imx_controller_suspend(struct device *dev,
>  	}
>  
>  	imx_disable_unprepare_clks(dev);
> +	enable_irq(data->wakeup_irq);
>  	if (data->plat_data->flags & CI_HDRC_PMQOS)
>  		cpu_latency_qos_remove_request(&data->pm_qos_req);
>  
> @@ -608,6 +630,9 @@ static int imx_controller_resume(struct device *dev,
>  	if (data->plat_data->flags & CI_HDRC_PMQOS)
>  		cpu_latency_qos_add_request(&data->pm_qos_req, 0);
>  
> +	if (!irqd_irq_disabled(irq_get_irq_data(data->wakeup_irq)))
> +		disable_irq_nosync(data->wakeup_irq);
> +
>  	ret = imx_prepare_enable_clks(dev);
>  	if (ret)
>  		return ret;
> @@ -643,6 +668,10 @@ static int ci_hdrc_imx_suspend(struct device *dev)
>  		return ret;
>  
>  	pinctrl_pm_select_sleep_state(dev);
> +
> +	if (device_may_wakeup(dev))
> +		enable_irq_wake(data->wakeup_irq);
> +
>  	return ret;
>  }
>  
> @@ -651,6 +680,9 @@ static int ci_hdrc_imx_resume(struct device *dev)
>  	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
>  	int ret;
>  
> +	if (device_may_wakeup(dev))
> +		disable_irq_wake(data->wakeup_irq);
> +
>  	pinctrl_pm_select_default_state(dev);
>  	ret = imx_controller_resume(dev, PMSG_RESUME);
>  	if (!ret && data->supports_runtime_pm) {
> -- 
> 2.34.1
> 

-- 

Best regards,
Peter