linux-kernel - Re: [PATCH v2 1/3] pmdomain: core: Introduce device_set/get_out_band

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Message-ID: <20250822052222.GA31356@nxa18884-linux.ap.freescale.net>
Date: Fri, 22 Aug 2025 13:22:22 +0800
From: Peng Fan <peng.fan@....nxp.com>
To: Peng Fan <peng.fan@....com>
Cc: 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>, 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
Subject: Re: [PATCH v2 1/3] pmdomain: core: Introduce
 device_set/get_out_band_wakeup()

Hi Ulf,

On Fri, Aug 01, 2025 at 12:34:22PM +0800, Peng Fan wrote:
>For some cases, a device could still wakeup the system even if its power
>domain is in off state, because the device's wakeup hardware logic is
>in an always-on domain.
>
>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.

Would you please give a look on this patch? Is it the right way
to resolve the issue or any suggestions?

Thanks,
Peng