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Add the 'regulator-always-on' >> property to avoid this. > > Mh, have this ever worked? Is there a commit which introduced a regression? Yes, this did work before, even without 'regulator-always-on'. I currently don't understand why this is needed. The regulator is referenced in the CPU nodes as 'cpu-supply'. This should be enough to not disable it as long as the CPU is up. 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Wed, 15 Sep 2021 12:09:08 +0000 Message-ID: <898fd5e0-2073-3689-89b6-2c5071773786@kontron.de> Date: Wed, 15 Sep 2021 14:09:06 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.0 Subject: Re: [PATCH] arm64: dts: imx8mm-kontron-n801x-som: do not allow to switch off buck2 Content-Language: en-US To: Michael Walle , Heiko Thiery Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Krzysztof Kozlowski , Joakim Zhang , Shengjiu Wang , Rob Herring , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team References: <20210915120325.20248-1-heiko.thiery@gmail.com> <7e7ee4244ababc0a46e0875222c7e37d@walle.cc> From: Frieder Schrempf In-Reply-To: <7e7ee4244ababc0a46e0875222c7e37d@walle.cc> X-ClientProxiedBy: AM0PR02CA0003.eurprd02.prod.outlook.com (2603:10a6:208:3e::16) To AM6PR10MB2968.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:20b:d6::31) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [192.168.31.128] (80.147.118.32) by AM0PR02CA0003.eurprd02.prod.outlook.com (2603:10a6:208:3e::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4500.14 via Frontend Transport; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 15.09.21 14:05, Michael Walle wrote: > Am 2021-09-15 14:03, schrieb Heiko Thiery: >> The buck2 output of the PMIC is the VDD core voltage of the cpu. >> Switching off this will poweroff the CPU. Add the 'regulator-always-on' >> property to avoid this. > > Mh, have this ever worked? Is there a commit which introduced a regression? Yes, this did work before, even without 'regulator-always-on'. I currently don't understand why this is needed. The regulator is referenced in the CPU nodes as 'cpu-supply'. This should be enough to not disable it as long as the CPU is up. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel