linux-kernel - [PATCH v2 3/3] usb: dwc3: imx8mp: Set out of band wakeup for i.MX95

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Message-Id: <20250801-pm-v2-3-97c8fb2a433c@nxp.com>
Date: Fri, 01 Aug 2025 12:34:24 +0800
From: Peng Fan <peng.fan@....com>
To: Ulf Hansson <ulf.hansson@...aro.org>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>, 
 Pavel Machek <pavel@...nel.org>, Peter Chen <peter.chen@...nel.org>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, 
 Thinh Nguyen <Thinh.Nguyen@...opsys.com>, 
 Vincent Guittot <vincent.guittot@...aro.org>, Xu Yang <xu.yang_2@....com>
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-usb@...r.kernel.org, imx@...ts.linux.dev, arm-scmi@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, Peng Fan <peng.fan@....com>
Subject: [PATCH v2 3/3] usb: dwc3: imx8mp: Set out of band wakeup for
 i.MX95

i.MX95 DWC3 inside HSIOMIX could still wakeup Linux, even if HSIOMIX
power domain(Digital logic) is off. There is still always on logic
have the wakeup capability which is out band wakeup capbility.

So use device_set_out_band_wakeup for i.MX95 to make sure DWC3 could
wakeup system even if HSIOMIX power domain is in off state.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/usb/dwc3/dwc3-imx8mp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/dwc3/dwc3-imx8mp.c b/drivers/usb/dwc3/dwc3-imx8mp.c
index bce6af82f54c24423c1e1fcc46913c8456b6f035..fde158d1f6e3d89d261ed3689a17d703878c7e37 100644
--- a/drivers/usb/dwc3/dwc3-imx8mp.c
+++ b/drivers/usb/dwc3/dwc3-imx8mp.c
@@ -248,6 +248,10 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev)
 	}

 	device_set_wakeup_capable(dev, true);
+
+	if (device_is_compatible(dev, "fsl,imx95-dwc3"))
+		device_set_out_band_wakeup(dev, true);
+
 	pm_runtime_put(dev);

 	return 0;

-- 
2.37.1