linux-kernel - [PATCH v3 0/4] pmdomain: core: Introduce device_set/get_out_band

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Message-Id: <20250902-pm-v3-0-ffadbb454cdc@nxp.com>
Date: Tue, 02 Sep 2025 11:32:59 +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 v3 0/4] pmdomain: core: Introduce
 device_set/get_out_band_wakeup and use it in usb

This is pick up of [1] which does not have response in about 5 months.
This V2 patchset
- includes usb driver changes(patch 2,3) to give people a full picture on how it is used.
- Rebased next-20250729 to resolve conflicts

To i.MX95, USB2 and USB3 are in HSIOMIX, but there is always on logic
to make USB2 and USB3 has wakeup capability when HSIOMIX power domain
is in off state. Otherwise the HSIOMIX will be kept on when
USB2 and USB3 are configured to be wakeup source and Linux suspended.
With this patchset, HSIOMIX could be powered off and Linux could still
be woke up by USB hotplug event.

Patch 1 introduces device_set/get_out_band_wakeup
Patch 2 and 3 are drivers changes to use device_set_out_band_wakeup

[1]https://lore.kernel.org/linux-pm/20250311083239.3336439-1-peng.fan@oss.nxp.com/

More old discussions:
https://lore.kernel.org/linux-pm/20250311083239.3336439-1-peng.fan@oss.nxp.com/

Signed-off-by: Peng Fan <peng.fan@....com>
---
Changes in v3:
- Add a new patch from Xu Yang to detach power domain for ci hdrc
- Add A-b for patch 4
- Link to v2: https://lore.kernel.org/r/20250801-pm-v2-0-97c8fb2a433c@nxp.com

---
Peng Fan (3):
      pmdomain: core: Introduce device_set/get_out_band_wakeup()
      usb: chipidea: ci_hdrc_imx: Set out of band wakeup for i.MX95
      usb: dwc3: imx8mp: Set out of band wakeup for i.MX95

Xu Yang (1):
      usb: chipidea: core: detach power domain for ci_hdrc platform device

 drivers/pmdomain/core.c            |  6 ++++--
 drivers/usb/chipidea/ci_hdrc_imx.c |  8 ++++++++
 drivers/usb/chipidea/core.c        |  3 +++
 drivers/usb/dwc3/dwc3-imx8mp.c     |  4 ++++
 include/linux/pm.h                 |  1 +
 include/linux/pm_wakeup.h          | 17 +++++++++++++++++
 include/linux/usb/chipidea.h       |  1 +
 7 files changed, 38 insertions(+), 2 deletions(-)
---
base-commit: 1b09efec32046a9c78cfecc46a26b1b139a3e8a8
change-id: 20250729-pm-243ff7097e44

Best regards,
-- 
Peng Fan <peng.fan@....com>