From patchwork Tue Feb 11 21:02:52 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. 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Wysocki" To: Linux PM Cc: LKML , Alan Stern , Ulf Hansson , Johan Hovold , Manivannan Sadhasivam , Jon Hunter Subject: [PATCH v1 01/10] PM: runtime: Introduce pm_runtime_no_support() Date: Tue, 11 Feb 2025 22:02:52 +0100 Message-ID: <22608556.EfDdHjke4D@rjwysocki.net> In-Reply-To: <2314745.iZASKD2KPV@rjwysocki.net> References: <2314745.iZASKD2KPV@rjwysocki.net> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CLIENT-IP: 195.136.19.94 X-CLIENT-HOSTNAME: 195.136.19.94 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeefvddrtddtgdegvddtjecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfjqffogffrnfdpggftiffpkfenuceurghilhhouhhtmecuudehtdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvvefufffkjghfggfgtgesthfuredttddtjeenucfhrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqeenucggtffrrghtthgvrhhnpedvffeuiedtgfdvtddugeeujedtffetteegfeekffdvfedttddtuefhgeefvdejhfenucfkphepudelhedrudefiedrudelrdelgeenucevlhhushhtvghrufhiiigvpedunecurfgrrhgrmhepihhnvghtpeduleehrddufeeirdduledrleegpdhhvghlohepkhhrvggrtghhvghrrdhlohgtrghlnhgvthdpmhgrihhlfhhrohhmpehrjhifsehrjhifhihsohgtkhhirdhnvghtpdhnsggprhgtphhtthhopeejpdhrtghpthhtoheplhhinhhugidqphhmsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtohepshhtvghrnhesrhhofihlrghnugdrhhgrrhhvrghrugdrvgguuhdprhgtphhtthhopehulhhfrdhhrghnshhsohhnsehlihhnrghrohdrohhrghdprhgtphhtthhopehjohhhrghnsehkvghrnhgvlhdrohhrghdprhgtphh X-DCC--Metrics: v370.home.net.pl 1024; Body=7 Fuz1=7 Fuz2=7 From: Rafael J. Wysocki Introduce a new helper function called pm_runtime_no_support() for checking the power.last_status value indicating whether or not runtime PM has ever been enabled for the given device. Signed-off-by: Rafael J. Wysocki --- include/linux/pm_runtime.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) --- a/include/linux/pm_runtime.h +++ b/include/linux/pm_runtime.h @@ -182,6 +182,19 @@ } /** + * pm_runtime_no_support - Check runtime PM support. + * @dev: Target device. + * + * Return %true if runtime PM is currently disabled for @dev and its last + * runtime PM status value is %RPM_INVALID, which means that runtime PM has + * never been enabled for it, or %false otherwise. + */ +static inline bool pm_runtime_no_support(struct device *dev) +{ + return dev->power.disable_depth && dev->power.last_status == RPM_INVALID; +} + +/** * pm_runtime_enabled - Check if runtime PM is enabled. * @dev: Target device. * @@ -284,6 +297,7 @@ static inline bool pm_runtime_suspended(struct device *dev) { return false; } static inline bool pm_runtime_active(struct device *dev) { return true; } static inline bool pm_runtime_status_suspended(struct device *dev) { return false; } +static inline bool pm_runtime_no_support(struct device *dev) { return true; } static inline bool pm_runtime_enabled(struct device *dev) { return false; } static inline void pm_runtime_no_callbacks(struct device *dev) {}