From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8EEE8606A335 for ; Fri, 13 Nov 2026 15:00:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=Q0IPx5qh; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=mEcequ7l DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=ECU2TElv91yxQnOvgc867H8L47o3wHkMu4XssOR6zp4=; b=Q0IPx5qhFw2jzzDZycMaJsUKQQ 0k93mAaGnJrABLEVlxYbCj9Im7KRjQa/rJgro1N1zWOKcMw9gKNGvfJeE6GwQcdWSjiq+FbkBCppU DcI5deAZqEQFzfuhPS5X062UWHw32Uq9NMvQP9AO303BqayO2IFHLRmwqhvu/VpLu91oF/dbh52bb wcOo5heQ51Ub6ka/Daj+mmLcs2DR7kvGzl7bBcZ1sxbDQg7TVRZI0kloG1Y6XurUHB5/smY8yMuSh MMnwYGD2y/DC81VtE5mZ/bRYXqMy8P4bFtqfckGjmQWg6Q0LsYTzmG3zItvdMdnII/Vzk+pxWue8W B+9C62lQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xRslq-0000000DHib-11Eh; Fri, 13 Nov 2026 15:00:54 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xRslo-0000000DHiO-3TmO for linux-arm-kernel@lists.infradead.org; Fri, 13 Nov 2026 15:00:52 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id E6F3462471; Fri, 13 Nov 2026 15:00:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 657881F000C4; Fri, 13 Nov 2026 15:00:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794582051; bh=ECU2TElv91yxQnOvgc867H8L47o3wHkMu4XssOR6zp4=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=mEcequ7lJSY0QqmebgyYBL2GVsiv3FYw/JOKPUTDI5HDXixYS6ovbYXxqZvcL8N5k aEOwBGO72ci2H9mHCLHcszDgGwxlpA32YyUN10eWL2aRs/N40CVeZM33qg6Sk9RZpk X051Th5jZ37nOT/KqB1wOJwc+hT1nLCW/EZdePgikIwD1WZt79l57FhuoSrRcWguRl JF9OZXYVNaVgIlrJa1m57hWfJ+CDdbo7upeHd2Q1aUQiR6woEX3/u12fsgOY5CBeDG Ju9fHJ+XZ0vHCSr6gdPFK35z9GOmOvpIvzkvtkzK4SG3e05e4zgorUgxbkJ4jA9FO0 ys38v0vVQoqnQ== Date: Fri, 13 Nov 2026 09:00:49 -0600 From: Rob Herring To: Agustin Santiago Isasmendi Cc: Russell King , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Arnd Bergmann , Stefan =?iso-8859-1?Q?D=F6singer?= , Navid Ghahremani , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org Subject: Re: [PATCH v2 1/2] dt-bindings: cache: l2c2x0: a disabled node is left to the firmware Message-ID: <20261113150049.GA903773-robh@kernel.org> References: <20261112072953.989664-1-isasmendi.agus@gmail.com> <20261112072953.989664-2-isasmendi.agus@gmail.com> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261112072953.989664-2-isasmendi.agus@gmail.com> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-15.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Thu, Nov 12, 2026 at 08:29:52AM +0100, Agustin Santiago Isasmendi wrote: > l2x0_of_init() is about to honour status = "disabled" on the L2 cache > node by leaving the controller alone. Say that the firmware must then > leave the cache disabled: the kernel does not check or change its state. > > Assisted-by: LLM > Signed-off-by: Agustin Santiago Isasmendi > --- > Documentation/devicetree/bindings/cache/l2c2x0.yaml | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/Documentation/devicetree/bindings/cache/l2c2x0.yaml b/Documentation/devicetree/bindings/cache/l2c2x0.yaml > index ee604117ffb3..15b5d8c1ebdf 100644 > --- a/Documentation/devicetree/bindings/cache/l2c2x0.yaml > +++ b/Documentation/devicetree/bindings/cache/l2c2x0.yaml > @@ -24,6 +24,9 @@ description: |+ > early secure boot code. Thus no need to deal with their configuration > in the kernel at all. > > + Note 2: A node with status = "disabled" is not touched by the kernel at > + all: the firmware must leave the cache disabled. > + No need for this. That is the expectation of any disabled status. The OS should treat a disabled node like it is not there. CPU nodes are an exception. Rob