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To support this case, introduce device_set/get_out_band_wakeup() to allow device drivers to control the behaviour in genpd for a device that is attached to it. Signed-off-by: Peng Fan Tested-by: Xu Yang --- drivers/pmdomain/core.c | 6 ++++-- include/linux/pm.h | 1 + include/linux/pm_wakeup.h | 17 +++++++++++++++++ 3 files changed, 22 insertions(+), 2 deletions(-) diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c index 0006ab3d078972cc72a6dd22a2144fb31443e3da..8e37758cea88a9ee051ad9fb13b= dd3feb4f8745e 100644 --- a/drivers/pmdomain/core.c +++ b/drivers/pmdomain/core.c @@ -1549,7 +1549,8 @@ static int genpd_finish_suspend(struct device *dev, if (ret) return ret; =20 - if (device_awake_path(dev) && genpd_is_active_wakeup(genpd)) + if (device_awake_path(dev) && genpd_is_active_wakeup(genpd) && + !device_get_out_band_wakeup(dev)) return 0; =20 if (genpd->dev_ops.stop && genpd->dev_ops.start && @@ -1604,7 +1605,8 @@ static int genpd_finish_resume(struct device *dev, if (IS_ERR(genpd)) return -EINVAL; =20 - if (device_awake_path(dev) && genpd_is_active_wakeup(genpd)) + if (device_awake_path(dev) && genpd_is_active_wakeup(genpd) && + !device_get_out_band_wakeup(dev)) return resume_noirq(dev); =20 genpd_lock(genpd); diff --git a/include/linux/pm.h b/include/linux/pm.h index cc7b2dc28574c24ece2f651352d4d23ecaf15f31..5b28a4f2e87e2aa34acc709e146= ce729acace344 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -684,6 +684,7 @@ struct dev_pm_info { bool smart_suspend:1; /* Owned by the PM core */ bool must_resume:1; /* Owned by the PM core */ bool may_skip_resume:1; /* Set by subsystems */ + bool out_band_wakeup:1; bool strict_midlayer:1; #else bool should_wakeup:1; diff --git a/include/linux/pm_wakeup.h b/include/linux/pm_wakeup.h index c838b4a30f876ef5a66972d16f461cfba9ff2814..c461c7edef6f7927d696b7d18b5= 9a6a1147f53a3 100644 --- a/include/linux/pm_wakeup.h +++ b/include/linux/pm_wakeup.h @@ -94,6 +94,16 @@ static inline void device_set_wakeup_path(struct device = *dev) dev->power.wakeup_path =3D true; } =20 +static inline void device_set_out_band_wakeup(struct device *dev, bool cap= able) +{ + dev->power.out_band_wakeup =3D capable; +} + +static inline bool device_get_out_band_wakeup(struct device *dev) +{ + return dev->power.out_band_wakeup; 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If power-domains property is provided in the OF node, both two platform devices will be attached to the same power domain. This should be unnecessary and may bring other inconsistent behavior. For example, to support wakeup capability, these two platform device need different power domain state. The parent device need NOT power domain on for out-band interrupt, but the ci_hdrc device need power domain on for in-band interrupt. The i.MX95 Soc support out-band wakeup interrupt, the user need to enable wakeup for the parent device, but if the user also enable wakeup for ci_hdrc device, the power domain will keep at on state finally. To exclude such inconsistent behavior and simplify the power management, detach power domain for ci_hdrc platform device. Signed-off-by: Xu Yang Reviewed-by: Ulf Hansson Tested-by: Xu Yang --- drivers/usb/chipidea/core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 694b4a8e4e1d8583dcbf4a42f8c2dfd785d5745c..70597f40b9997a9766934c67bbb= ed38e96c210f8 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -915,6 +916,8 @@ struct platform_device *ci_hdrc_add_device(struct devic= e *dev, if (ret) goto err; =20 + dev_pm_domain_detach(&pdev->dev, false); + return pdev; =20 err: --=20 2.37.1 From nobody Fri Oct 3 11:25:01 2025 Received: from GVXPR05CU001.outbound.protection.outlook.com (mail-swedencentralazon11013069.outbound.protection.outlook.com [52.101.83.69]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BD6862E1F08; Tue, 2 Sep 2025 03:33:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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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 usb2 could wakeup system even if HSIOMIX power domain is in off state. Signed-off-by: Peng Fan Reviewed-by: Xu Yang Tested-by: Xu Yang --- drivers/usb/chipidea/ci_hdrc_imx.c | 8 ++++++++ include/linux/usb/chipidea.h | 1 + 2 files changed, 9 insertions(+) diff --git a/drivers/usb/chipidea/ci_hdrc_imx.c b/drivers/usb/chipidea/ci_h= drc_imx.c index d7c2a1a3c2715967203b98c819fa864e06a00a32..a2b3f673dfc1183a02783bf6ef9= 2f8570c6042cf 100644 --- a/drivers/usb/chipidea/ci_hdrc_imx.c +++ b/drivers/usb/chipidea/ci_hdrc_imx.c @@ -79,6 +79,10 @@ static const struct ci_hdrc_imx_platform_flag imx8ulp_us= b_data =3D { CI_HDRC_HAS_PORTSC_PEC_MISSED, }; =20 +static const struct ci_hdrc_imx_platform_flag imx95_usb_data =3D { + .flags =3D CI_HDRC_SUPPORTS_RUNTIME_PM | CI_HDRC_OUT_BAND_WAKEUP, +}; + static const struct ci_hdrc_imx_platform_flag s32g_usb_data =3D { .flags =3D CI_HDRC_DISABLE_HOST_STREAMING, }; @@ -94,6 +98,7 @@ static const struct of_device_id ci_hdrc_imx_dt_ids[] =3D= { { .compatible =3D "fsl,imx7d-usb", .data =3D &imx7d_usb_data}, { .compatible =3D "fsl,imx7ulp-usb", .data =3D &imx7ulp_usb_data}, { .compatible =3D "fsl,imx8ulp-usb", .data =3D &imx8ulp_usb_data}, + { .compatible =3D "fsl,imx95-usb", .data =3D &imx95_usb_data}, { .compatible =3D "nxp,s32g2-usb", .data =3D &s32g_usb_data}, { /* sentinel */ } }; @@ -570,6 +575,9 @@ static int ci_hdrc_imx_probe(struct platform_device *pd= ev) =20 device_set_wakeup_capable(dev, true); =20 + if (pdata.flags & CI_HDRC_OUT_BAND_WAKEUP) + device_set_out_band_wakeup(dev, true); + return 0; =20 disable_device: diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h index e17ebeee24e3ecc4b1c2d153d9ea9b656b5a3d35..c6451191d2de68607a938048270= 1d11f949d0ff7 100644 --- a/include/linux/usb/chipidea.h +++ b/include/linux/usb/chipidea.h @@ -66,6 +66,7 @@ struct ci_hdrc_platform_data { #define CI_HDRC_HAS_PORTSC_PEC_MISSED BIT(17) #define CI_HDRC_FORCE_VBUS_ACTIVE_ALWAYS BIT(18) #define CI_HDRC_HAS_SHORT_PKT_LIMIT BIT(19) +#define CI_HDRC_OUT_BAND_WAKEUP BIT(20) enum usb_dr_mode dr_mode; #define CI_HDRC_CONTROLLER_RESET_EVENT 0 #define CI_HDRC_CONTROLLER_STOPPED_EVENT 1 --=20 2.37.1 From nobody Fri Oct 3 11:25:01 2025 Received: from PA4PR04CU001.outbound.protection.outlook.com (mail-francecentralazon11013065.outbound.protection.outlook.com [40.107.162.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2D9B22E0B60; 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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. Acked-by: Thinh Nguyen Signed-off-by: Peng Fan Reviewed-by: Xu Yang Tested-by: Xu Yang --- 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..fde158d1f6e3d89d261ed3689a1= 7d703878c7e37 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 *p= dev) } =20 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); =20 return 0; --=20 2.37.1