[PATCH v4 5/5] phy: fsl-imx8mq-usb: keep PHY power domain runtime always-on for i.MX8MP

Xu Yang xu.yang_2 at oss.nxp.com
Mon Jun 8 04:27:52 PDT 2026


On Fri, Jun 05, 2026 at 11:30:15AM -0400, Frank Li wrote:
> On Fri, Jun 05, 2026 at 07:13:06PM +0800, Xu Yang wrote:
> > From: Xu Yang <xu.yang_2 at nxp.com>
> >
> > On i.MX8MP, the USB PHY has a dedicated power domain that was previously
> > never powered off at runtime. With the introduction of runtime PM support,
> > the power domain will be powered off if the device is runtime suspended,
> > which breaks USB wakeup functionality.
> 
> Does it need depend on if device enable wakeup?

No. The wakeup is for system suspend. We handle the runtime case here.

Thanks,
Xu Yang



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