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[73.183.53.213]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-532620acc1bsm51463701cf.25.2026.09.17.09.01.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Sep 2026 09:01:43 -0700 (PDT) Date: Thu, 17 Sep 2026 12:01:42 -0400 From: Brian Masney To: alexandre.belloni@bootlin.com Cc: Stephen Boyd , Brian Masney , Jerome Brunet , linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] clk: disable unused clocks registered after boot Message-ID: References: <20260917144011.3014860-1-alexandre.belloni@bootlin.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260917144011.3014860-1-alexandre.belloni@bootlin.com> User-Agent: Mutt/2.4.0 (2026-06-19) Hi Alexandre, On Thu, Sep 17, 2026 at 04:40:10PM +0200, alexandre.belloni@bootlin.com wrote: > From: Alexandre Belloni > > clk_disable_unused() only runs once as a late_initcall, so clocks > registered afterwards by loading a module are never checked and may be left > running needlessly. > > So record when clk_disable_unused has run and afterwards, schedule a > delayed work to run the scan when new clocks are registered. > > Signed-off-by: Alexandre Belloni We're actually in the process of redoing the way clk_disable_unused is handled. I posted a series to add sync_state support to the clk framework: https://lore.kernel.org/linux-clk/20260626-clk-sync-state-v1-0-4156d8196dc8@redhat.com/ Will you be at Linux Plumbers in Prague in 2.5 weeks? If so, come to this talk where we will talk about the clk subsystem. Evolving support for sync_state to subsystems beyond genpd https://lpc.events/event/20/contributions/2504/ Brian