phy: fsl-imx8mq-usb: keep PHY power domain runtime always-on for i.MX8MP

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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.

To preserve wakeup functionality, mark the PHY power domain as runtime
always-on for i.MX8MP platform. To limit the behavior to i.MX8MP, add a
need_genpd_rpm_on to imx8mq_usb_phy_drvdata and set it as true for i.MX8MP.

Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260731-imx8mp-usb-phy-improvement-v8-6-2ec8d6b3854d@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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Xu Yang 2026-07-31 16:11:24 +08:00 • committed by Vinod Koul

parent 2d9dcffd5d

commit ee9e2b39ea

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drivers/phy/freescale/phy-fsl-imx8mq-usb.c

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