From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 55AB532E156; Mon, 22 Dec 2025 11:50:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766404239; cv=none; b=aSDaIPrPifMVrOqHLJhhrLJoOQ02Ohj1Ek4cqWJS1jPSBnCJWOmyYOz3dZVzLwc1skcf1j1fo4saNYImuvksrWh1e0wDHwp/cGj/EIRCtZlzLiuEDGyJcYA0NRKFDQaQckfCxXnwYi92T/RwVhoCpsS1AA2lYG3EklQFbQw5w0Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766404239; c=relaxed/simple; bh=qtFhad+oksdajZTyUIhQ/cThE6gZHtNWEc9qENT9c2E=; h=From:To:Cc:In-Reply-To:References:Subject:Message-Id:Date: MIME-Version:Content-Type; b=VOsAxYzBKZUnjHKUZ0E4v4j6mNa0SSvOVGEzGaIwFXTFCd0HYTF3Q2FPHHktobxSO0wYUG/76mgixKFwCvdmeoA0dcg09sHzh0DQFQQ5c3lrNZ5/+7UJ53IqUtSHRiiCyUAfyW5XgMzx/aTdCkZxB7Ntb5Pisq7TwgLEYcQr6/o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=qSyz+iFe; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="qSyz+iFe" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7178DC116C6; Mon, 22 Dec 2025 11:50:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1766404239; bh=qtFhad+oksdajZTyUIhQ/cThE6gZHtNWEc9qENT9c2E=; h=From:To:Cc:In-Reply-To:References:Subject:Date:From; b=qSyz+iFeGQEA+35kpg996olqXKNHMAZ+5ja+4eg3YnH0hkrrbawEJgu7DR41OERnx TjDB6udahrCOjg2YGo/0RXCsWDxLj4QSfgbD1kPjrj9EbK/K9w/IPHUMpMOIXA3SIp rckEAFf+K+L6J9nt3PirhSYqE9EWnNvUpWeIw0JVa0Sng24Tj36HcOO05PPNhE7naf ulnRBFXtlWmUxiiMAvLLmOu/dvaTyc6NUzJ1ZxbeJ2UQVcb6FX+GUb3ioKeYajVAl/ u9nto3aGPWJnLzyLus8bJU2URh3sCpXO1yXvRYfPTVhLaZQloN7Jje57TAfQZYknNi MTUObcXAjfrLw== From: Krzysztof Kozlowski To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alim Akhtar , =?utf-8?q?Andr=C3=A9_Draszik?= , Tudor Ambarus , Michael Turquette , Stephen Boyd , Sam Protsenko , Sylwester Nawrocki , Chanwoo Choi , Peter Griffin Cc: Will McVicker , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, kernel-team@android.com In-Reply-To: <20251222-automatic-clocks-v7-0-fec86fa89874@linaro.org> References: <20251222-automatic-clocks-v7-0-fec86fa89874@linaro.org> Subject: Re: (subset) [PATCH v7 0/4] Implement hardware automatic clock gating (HWACG) for gs101 Message-Id: <176640423317.47079.9046133168071940495.b4-ty@kernel.org> Date: Mon, 22 Dec 2025 12:50:33 +0100 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="utf-8" Content-Transfer-Encoding: 7bit X-Mailer: b4 0.14.3 On Mon, 22 Dec 2025 10:22:11 +0000, Peter Griffin wrote: > This series addresses an issue with Samsung Exynos based upstream clock driver > whereby the upstream clock driver sets all the clock gates into "manual mode" > (which uses a bit that is documented as reserved in the gate registers). > > Another issue with the current "manual clock gating" approach upstream is > there are many bus/interconnect clocks whose relationships to the IPs > are not well documented or defined in the specs. When adding a new CMU until > now we have tried to label these clocks appropriately with CLK_IS_CRITICAL and > CLK_IGNORE_UNUSED but doing so is both error prone and time consuming. If > your lucky disabling a critical bus clock causes an immediate hang. Other > clocks however aren't so obvious and show up through random instability > some period of time later. > > [...] Applied, thanks! [2/4] arm64: dts: exynos: gs101: add samsung,sysreg property to CMU nodes https://git.kernel.org/krzk/linux/c/01272f05aae5f6aca4337eb52e6b9290ce12e9f7 Best regards, -- Krzysztof Kozlowski