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07 Feb 2025 13:37:34 +0100 X-CheckPoint: {67A5FE8C-43-727D2C21-EE1B71AA} X-MAIL-CPID: 1E6721796D650DEE10A7DEEE738D12C6_5 Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 9884B167399; Fri, 7 Feb 2025 13:37:27 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ew.tq-group.com; s=dkim; t=1738931848; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Hb1BL9HTKTtLH1zeyF/ibnMzCyaoavTXsXdsLMI6yWg=; b=I1/z7SKqrPX2qN6C5RiE/udQgARQgIi1j+FAtEhyXMgksxFGgHeGeoA+rs+40fd9orRLWg evVtGx5cAHqAkcNInDsomMTCCSaEiG6Oxcih+ogR+ni/+g/QOHub8Nrj+F+rvEs8Wj9W+J g2cyhZnxfSmghza5625asIvgAD6EV6okFThIaAbuX/fRCsCE8ntJCPm6XvQsTxJFJWay4d 4wcLWC2lES23ablBxxCOzSKEnc1TbQxvJucOOcDLZJFsJjSt+6HBI2x0UJ4a37YOKwRfTw xXNhKI+GBnWHQJucW7BXfW/7i+VmtB6OyUM7YHaA0t68UJuAR7VvAiskgA4mhQ== From: Alexander Stein To: Peng Fan Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Srinivas Kandagatla , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 04/10] arm64: dts: imx8mn: Add access-controller references Date: Fri, 07 Feb 2025 13:37:27 +0100 Message-ID: <8037692.EvYhyI6sBW@steina-w> Organization: TQ-Systems GmbH In-Reply-To: <20250207120213.GD14860@localhost.localdomain> References: <20250207083616.1442887-1-alexander.stein@ew.tq-group.com> <20250207083616.1442887-5-alexander.stein@ew.tq-group.com> <20250207120213.GD14860@localhost.localdomain> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1" X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250207_123759_590802_C9BC74A9 X-CRM114-Status: GOOD ( 14.17 ) 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 Hi Peng, Am Freitag, 7. Februar 2025, 13:02:13 CET schrieb Peng Fan: > On Fri, Feb 07, 2025 at 09:36:09AM +0100, Alexander Stein wrote: > >Mark ocotp as a access-controller and add references on peripherals > >which can be disabled (fused). >=20 > I am not sure whether gpcv2 changes should be included in this patchset > or not. Just add access-controller for fused IP will not work. Well, I was able to successfully boot a i.MX8M Nano DualLite. > i.MX8M BLK-CTRL/GPC will hang if the related power domain is still touched > by kernel. The pgc can't power up/down because clock is gated.=20 Well, with GPU node disabled, no one should enable the power domain. But to be on the safe side I would also add access-controllers to the corresponding power domains as well. > This comment also apply to i.MX8MM/P. Sure. Do you have any information what is actually disabled by those fused? It seems it's the IP and their power domains. Anything else? Best regards, Alexander =2D-=20 TQ-Systems GmbH | M=FChlstra=DFe 2, Gut Delling | 82229 Seefeld, Germany Amtsgericht M=FCnchen, HRB 105018 Gesch=E4ftsf=FChrer: Detlef Schneider, R=FCdiger Stahl, Stefan Schneider http://www.tq-group.com/