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(h-178-174-189-39.A498.priv.bahnhof.se. [178.174.189.39]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-568190f8040sm445440e87.148.2025.09.09.04.11.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Sep 2025 04:11:33 -0700 (PDT) From: Ulf Hansson To: Geert Uytterhoeven , Nicolas Frattaroli , Saravana Kannan , linux-pm@vger.kernel.org Cc: Stephen Boyd , "Rafael J . Wysocki" , Heiko Stuebner , Sebastian Reichel , Sebin Francis , Diederik de Haas , Bjorn Andersson , Abel Vesa , Peng Fan , Tomi Valkeinen , Johan Hovold , Maulik Shah , Michal Simek , Konrad Dybcio , Thierry Reding , Jonathan Hunter , Ulf Hansson , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/5] pmdomain: Restore behaviour for disabling unused PM domains Date: Tue, 9 Sep 2025 13:11:19 +0200 Message-ID: <20250909111130.132976-1-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250909_121136_971039_78DB52CE X-CRM114-Status: GOOD ( 10.90 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Recent changes to genpd prevents those PM domains being powered-on during initialization from being powered-off during the boot sequence. Based upon whether CONFIG_PM_CONFIG_PM_GENERIC_DOMAINS_OF is set of not, genpd relies on the sync_state mechanism or the genpd_power_off_unused() (which is a late_initcall_sync), to understand when it's okay to allow these PM domains to be powered-off. This new behaviour in genpd has lead to problems on different platforms [1]. In this series, I am therefore suggesting to restore the behavior of genpd_power_off_unused() along with introducing a new genpd config flag, GENPD_FLAG_NO_STAY_ON, to allow genpd OF providers to opt-out from the new behaviour. Kind regards Ulf Hansson [1] https://lore.kernel.org/all/20250701114733.636510-1-ulf.hansson@linaro.org/ https://lore.kernel.org/all/20250902-rk3576-lockup-regression-v1-1-c4a0c9daeb00@collabora.com/ Ulf Hansson (5): pmdomain: core: Restore behaviour for disabling unused PM domains pmdomain: rockchip: Fix regulator dependency with GENPD_FLAG_NO_STAY_ON pmdomain: renesas: rcar-sysc: Don't keep unused PM domains powered-on pmdomain: renesas: rcar-gen4-sysc: Don't keep unused PM domains powered-on pmdomain: renesas: rmobile-sysc: Don't keep unused PM domains powered-on drivers/pmdomain/core.c | 20 ++++++++++++++------ drivers/pmdomain/renesas/rcar-gen4-sysc.c | 1 + drivers/pmdomain/renesas/rcar-sysc.c | 1 + drivers/pmdomain/renesas/rmobile-sysc.c | 3 ++- drivers/pmdomain/rockchip/pm-domains.c | 2 +- include/linux/pm_domain.h | 7 +++++++ 6 files changed, 26 insertions(+), 8 deletions(-) -- 2.43.0