From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6638BFF60FF for ; Tue, 31 Mar 2026 10:12:32 +0000 (UTC) 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:Content-Transfer-Encoding: Content-Type:Subject:References:In-Reply-To:Message-Id:Cc:To:From:Date: MIME-Version:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Ppm8Ahxu3yD+PaCS+Jim/Aqx0Ce8DbNQlo2I+oBEARU=; b=tQtRHA1Yn+OKEm15wY6wmO3JUz WSyDE/dFoO79jizKzyj5viLLWQkE9J2BghTJy+NfWLSBTY2vzyCG/iCDTgyHUp/2T4/ZIXAdmI5Zx ubJOd39xBsupsj2WsIHaIYoT9FsnEIliQP1jSZaBkP+lmxYIghl8cLoPXzZs433fJj2c04MSTJj0B psaEqL+oBYHG6xRkq6p5PgwxWKG6Ju5RWNwr32oBCfo8vRyet+43RV6p/6VC8CMPUFnofNwmZwQA+ 7M8jPEcspq0Kucv30KmkR3CvVds9KAZrg13fDJ3u2P9PVES8NoOMkF4JQVKMEJbbwSPBl8N04Cobp uX0XAYQg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7W5B-0000000CkYc-3gNn; Tue, 31 Mar 2026 10:12:25 +0000 Received: from fout-a6-smtp.messagingengine.com ([103.168.172.149]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w7W58-0000000CkXG-3XxB for linux-arm-kernel@lists.infradead.org; Tue, 31 Mar 2026 10:12:24 +0000 Received: from phl-compute-04.internal (phl-compute-04.internal [10.202.2.44]) by mailfout.phl.internal (Postfix) with ESMTP id F12ABEC010C; Tue, 31 Mar 2026 06:12:20 -0400 (EDT) Received: from phl-imap-02 ([10.202.2.81]) by phl-compute-04.internal (MEProxy); Tue, 31 Mar 2026 06:12:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=arndb.de; h=cc :cc:content-transfer-encoding:content-type:content-type:date :date:from:from:in-reply-to:in-reply-to:message-id:mime-version :references:reply-to:subject:subject:to:to; s=fm1; t=1774951940; x=1775038340; bh=Ppm8Ahxu3yD+PaCS+Jim/Aqx0Ce8DbNQlo2I+oBEARU=; b= SH5HD3eDFjqigcr/67yohxqmEFPcoDYm+X66SGibt8qEGfUvVYOF8Fb2pErlBdJk gS3Fk6APUCJC/Ydbo8NykY5BH7rKOfxiQPAvYxpk2MF6J2dUNoAKxTLnGoYPxFmU DQkhNlRqRr7Ql/QCON1ryH0nim/eKY/AWEBnKuinvp1XmblZDTdgoGUgDwrOZ4/c PrX0ZhZIBl2SDv3cSHI13UhpclcUE99/klk6NBGiOPLwJHqLLnwcuDT6M+lGFxmi 31mOciEGB32HB1X3EhK7cZRlOCkP4WApBnG7p67mL2S23snBa4j4FZolC3JYCCju l/kPh+S6hoFiUjigRyZ/bg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:content-type:date:date:feedback-id:feedback-id :from:from:in-reply-to:in-reply-to:message-id:mime-version :references:reply-to:subject:subject:to:to:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm2; t=1774951940; x= 1775038340; bh=Ppm8Ahxu3yD+PaCS+Jim/Aqx0Ce8DbNQlo2I+oBEARU=; b=J heDDw++4zOPnwVEt4nKnSX739unAB96P1xTMIZdCDH59ovLtEUqU6WTkp/KAx/s/ g2a9M9SJRSu5eXpToDVGv8ufqm9yRYH4fxX2JoAPLcs6gSDXd11ZuibCA3rH9Z5X snxpvBtPvz2otie2z1+/bmkHMV3HkH5LGydrDouPm1rov3J74auD1ikEQOb0eZXU 3Z3VO/BrEiZcso9tl9HAize72+MxRmq9bwNff/cJNcI6J8Pb+MtpwGpq7Heo4kbD qnuxlxQEoF623TGCBAC3LKmYtQhrKgtY2kX4CzUg5bxCmCt0ZEsrZYOg2k3ebwpo nNSGpta9lQvDABDyHgvXg== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeefgedrtddtgdefgeduieduucetufdoteggodetrf dotffvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfurfetoffkrfgpnffqhgenuceu rghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujf gurhepofggfffhvfevkfgjfhfutgfgsehtjeertdertddtnecuhfhrohhmpedftehrnhgu uceuvghrghhmrghnnhdfuceorghrnhgusegrrhhnuggsrdguvgeqnecuggftrfgrthhtvg hrnhephfdthfdvtdefhedukeetgefggffhjeeggeetfefggfevudegudevledvkefhvdei necuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomheprghrnh gusegrrhhnuggsrdguvgdpnhgspghrtghpthhtohepfedvpdhmohguvgepshhmthhpohhu thdprhgtphhtthhopegsrhhglhessghguggvvhdrphhlpdhrtghpthhtoheptghhvghsth gvrheivdehudehsehgmhgrihhlrdgtohhmpdhrtghpthhtohepfhgvshhtvghvrghmsehg mhgrihhlrdgtohhmpdhrtghpthhtoheptghonhhorhdoughtsehkvghrnhgvlhdrohhrgh dprhgtphhtthhopehkrhiikhdoughtsehkvghrnhgvlhdrohhrghdprhgtphhtthhopehk rhiikheskhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhgvvgeskhgvrhhnvghlrdhorh hgpdhrtghpthhtoheprhgrfhgrvghlsehkvghrnhgvlhdrohhrghdprhgtphhtthhopehr ohgshheskhgvrhhnvghlrdhorhhg X-ME-Proxy: Feedback-ID: i56a14606:Fastmail Received: by mailuser.phl.internal (Postfix, from userid 501) id 5ACF3700065; Tue, 31 Mar 2026 06:12:20 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface MIME-Version: 1.0 X-ThreadId: ABMmOHXEXk43 Date: Tue, 31 Mar 2026 12:11:40 +0200 From: "Arnd Bergmann" To: "Khristine Andreea Barbulescu" , "Krzysztof Kozlowski" , "Ghennadi Procopciuc" Cc: "Linus Walleij" , "Bartosz Golaszewski" , "Krzysztof Kozlowski" , "Conor Dooley" , "Chester Lin" , "Matthias Brugger" , "Ghennadi Procopciuc" , "Larisa Grigore" , "Lee Jones" , "Shawn Guo" , "Sascha Hauer" , "Fabio Estevam" , "Aisheng Dong" , "Jacky Bai" , "Greg Kroah-Hartman" , "Rafael J . Wysocki" , "Alberto Ruiz" , "Christophe Lizzi" , devicetree@vger.kernel.org, "Enric Balletbo" , "Eric Chanudet" , imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, "open list:GPIO SUBSYSTEM" , linux-kernel@vger.kernel.org, "NXP S32 Linux Team" , "Pengutronix Kernel Team" , "Vincent Guittot" , "Rob Herring" Message-Id: In-Reply-To: <4c46909d-641b-4389-bc4a-29394cb1d46d@oss.nxp.com> References: <20260120115923.3463866-1-khristineandreea.barbulescu@oss.nxp.com> <20260120115923.3463866-2-khristineandreea.barbulescu@oss.nxp.com> <20260121021913.GA1704619-robh@kernel.org> <7d200097-51bc-4404-be8b-f536d0ecfc25@oss.nxp.com> <21531cdd-5ab9-493e-a722-61b98117e2c4@kernel.org> <22a5a072-847e-4cfd-8abd-e37163f73265@oss.nxp.com> <3c454da1-d949-4258-87ce-8b545000bf01@app.fastmail.com> <5f1b651b-1064-4280-a7e0-b7d66c396cde@oss.nxp.com> <4c46909d-641b-4389-bc4a-29394cb1d46d@oss.nxp.com> Subject: Re: [PATCH v8 01/10] dt-bindings: mfd: add support for the NXP SIUL2 module Content-Type: text/plain Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260331_031223_402395_D688F64D X-CRM114-Status: GOOD ( 13.08 ) 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 On Tue, Mar 31, 2026, at 09:48, Khristine Andreea Barbulescu wrote: > > With the current layout, the SIUL2 node itself now contains the two > MMIO ranges directly, while the remaining child node is only the > pinctrl/GPIO function. The thread started by saying this is an MFD "It can export information about the SoC, configure the pinmux&pinconf for pins and it is also a GPIO controller with interrupt capability." Having a combined pinctrl/gpio/irqchip driver is normal, but can you clarify what you plan to do with the "information about the SoC" part? Was this a "soc_device" driver, or something else? Have you concluded now that this is not going to be needed at all? In that case, I guess having a monolithic driver is indeed simpler than an MFD. What I wonder about then is whether the binding needs to be changed at all. With the current nxp,s32g2-siul2-pinctrl.yaml binding and pinctrl-s32g2.c implementation, you seem to have a monolithic device already, though missing the gpio functionality. Rather than completely replacing this, I assume the easiest way then would be to add the PGPD registers into this device node, right? It is still a bit weird to list the individual register areas inside of the larger device here, but that still seems better than an incompatible binding change. Arnd