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 F22FAC5AD49 for ; Fri, 6 Jun 2025 08:36:45 +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:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=mGoaHhBEs84jRlIR6Kq262oVT736vqFNSTZYQlXH/Qo=; b=EyqGlvk5jnY6FT+KZnAFCXxMHZ Y7+AW28oEK3T6Ao+3dk8wgSERq6KpFd7RYfOjny2teKh2YkRbYO9gFV0SS86Rmko5xlLi3Qy9SAn9 bQNurZxQJhc8JDQJVSFHV8HQq6bIIiLtNG9Y6ahXnrZEW1Oozag0zYuk+/D8KQ7gLRBjQMENRkbJB JGLVuOwrAxoKzknVvQ4NT5uhA4jnZm144NG9RL/XaSpvnffXkTq7BmfClTBYHFAIUOi3LJs+nUJD2 rjKjlwFMoGKVKca/9LKxeHaBdny7auSs57Qhe1nBBKEj/B7T6+Vd4E69TIYlXPIw+4K+iJOVsnND5 y5Sq5w+Q==; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250606_012951_421152_152C2920 X-CRM114-Status: GOOD ( 10.01 ) 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 15/05/2025 21:50, Alexey Charkov wrote: >>> + >>> + "#address-cells": >>> + const: 1 >>> + >>> + "#size-cells": >>> + const: 0 >> >> This follows the SPI binding, right? Drop these 2 and add a $ref to >> spi-controller.yaml. > > Need some advice here. While this controller speaks SPI protocol to > its connected flash chips, it's a special-purpose thing that doesn't > expose much SPI functionality to the outside world, nor can it drive > any SPI devices other than SPI NOR flash. Does that still qualify as > an SPI controller as far as the bindings are concerned? > > Happy to reference the spi-controller.yaml binding if so. SPI NOR flashes are still child devices of an SPI controller. You can look at other examples - aren't they all using spi-controller? Why this would be different? Unless you found some cases that are different, but then which ones? Best regards, Krzysztof 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 D4557C5B549 for ; Fri, 6 Jun 2025 08:36:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=hPfQNmOKAEycG+ELv3xGMQpCFoKEwobCDWG4JPudfv4=; b=V4PW4PPqLTORf+ UYOakDxHRV+7WJcyx4GA8QQviQj8bEWJ+fyAi4ibm+Wyxqy1ZK6jsoHJKY1drcoV2dDnsvh+bfrZl 05IKkULHv8mcGhVic4CHw8sxQmM8rrNokyal2pG2aqotnVVmy/1TbgADb6gxG+kNUOl++ukGE+r2H 8poy/85i9TPEoFiT6tadp3MHcieeH2+NbLXzAOHz8f67RrxKDBXs0j81vaeXbaC9FZE9uFTV8rwjh 1CGizooSTF1VQzJg46Z2K0tG9FPsRnc++LASU0B5nPdoyBZi9UWAmjjWxST2rSVna2iZQGjcSYdgk ZMK4VKbDj+WHJWb8TKvQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uNSZ3-0000000HQHE-2kGT; Fri, 06 Jun 2025 08:36:37 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uNSSV-0000000HPUH-1BrR; Fri, 06 Jun 2025 08:29:52 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 6DA075C54C3; Fri, 6 Jun 2025 08:27:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 87DB4C4CEEB; Fri, 6 Jun 2025 08:29:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1749198589; bh=p58weIsFCfwQqxGp6yxoipCZRt8rQHLF3ZORFLs038A=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=BmgxgmzJMieXblyWPM7AEFO2QKm7H8LwOTVN2wP8L+JXxsv2Gxw4wAkSdxsDgm0oi OTBkdjktdeTWwds2N7pSMAt0pGeYSujD7jdsOVfY8t1hvXSMaDQ+VdycebFKPVMaPS T9VGzouWK3obIAaKTaAW7ZtCbTItD4uX4aWnj/PFK+1dncyrq6Gbm++SHu3nIt8sge 6AqnLfHgQ7nic2fMiIexsMlIfCOjmQYt/6ILyRLxborftG3KXqsrYfIGZDZuBahyKR ZJ9+GuYgO9VXZ/dGDxGfb+PzeXUat9yRlCdCNYGlQ5AbOa4Rj2/HMOGe6fSrPsd0h6 YmfDarRTBtS9A== Message-ID: <2b520ae5-eb0d-40eb-ba73-cc18759f33b9@kernel.org> Date: Fri, 6 Jun 2025 10:29:44 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/3] dt-bindings: spi: Add VIA/WonderMedia serial flash controller To: Alexey Charkov , Rob Herring Cc: Mark Brown , Krzysztof Kozlowski , Conor Dooley , Tudor Ambarus , Pratyush Yadav , Michael Walle , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, linux-arm-kernel@lists.infradead.org References: <20250510-wmt-sflash-v1-0-02a1ac6adf12@gmail.com> <20250510-wmt-sflash-v1-1-02a1ac6adf12@gmail.com> <20250514204159.GA2988411-robh@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org On 15/05/2025 21:50, Alexey Charkov wrote: >>> + >>> + "#address-cells": >>> + const: 1 >>> + >>> + "#size-cells": >>> + const: 0 >> >> This follows the SPI binding, right? Drop these 2 and add a $ref to >> spi-controller.yaml. > > Need some advice here. While this controller speaks SPI protocol to > its connected flash chips, it's a special-purpose thing that doesn't > expose much SPI functionality to the outside world, nor can it drive > any SPI devices other than SPI NOR flash. Does that still qualify as > an SPI controller as far as the bindings are concerned? > > Happy to reference the spi-controller.yaml binding if so. SPI NOR flashes are still child devices of an SPI controller. You can look at other examples - aren't they all using spi-controller? Why this would be different? Unless you found some cases that are different, but then which ones? Best regards, Krzysztof ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/