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 28931E7716C for ; Thu, 5 Dec 2024 16:11:00 +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=lxPcSAJycpITkz+0vEB39oPZNpqzbGLxOIu7O4+N64E=; b=gShn8Y1WmG64nDHlNRwxl37N8E IRKvEoJ3/ikWaq+A/CHw0am3svWlgOprsbdc27AjiH3RSAkVR6li3eqXRESdLK8TaDr7gOF+zltWD 6rzZaEq+4rW0R6t94AyGQzp5bzegOu47JtJLFHyYeG9RXE5X6rTWZN7NmQla6xlDpxlhTuL9XruF4 T30Zo+qaNF+J7+uhOJgcN2l+SvEZ6bqKtWilJG+JUV4MDgVevRPAnGlh69myOh+UDGPZy5n80o/iv hCasnT/EYUo1g9GI2KAbZ1Y5n6GDs6w+UwXwD4e/W7IqtWyQJkSgN93fXO8delxbWBal6gCXg9SFM yTTO66Mg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tJERC-0000000GhNd-49KF; Thu, 05 Dec 2024 16:10:46 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tJEQA-0000000Ggth-10Fm for linux-arm-kernel@lists.infradead.org; Thu, 05 Dec 2024 16:09:43 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id C61335C6718; Thu, 5 Dec 2024 16:08:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 471FBC4CED1; Thu, 5 Dec 2024 16:09:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733414981; bh=BI10j7N0jmfF33MEnsfZwYICaNRriKAkr2hC+nrTV4M=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ZpDheFUQFZF1KsFrDt3raluPbU97o/WPag0C1znA7lmuGlahxo5PQ/0XWo7wtJ9rV MhRBeg94WgoGDeDyIptBRu8GcGRIWy/lbhHcOM8LB+A7C0NrNov1KE+S47pChZ8kkg IJ7MGNo9vniAqWfkTRQaafQRwsYNvH1jwTjI9gzrOHiQ/lX7DH3ORLlOcyiYbkHYnb l6N6/oopErvt+Y9kyNPLqtI4xRK/whEuxSfqscEakwsaJ5W7wTwt77sWPyRrjiZxqy oLU8UOaGLT8fpwJlgJVpl2y8xICDRZBdI5KEZEVmq6l4meSK4zHGch2RFX7qyisyJr DbcqWCrTQwXpg== Message-ID: <28d1bb46-ab18-42da-9ca2-ff498c888d66@kernel.org> Date: Thu, 5 Dec 2024 17:09:35 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1] dt-bindings: dma: st-stm32-dmamux: Add description for dma-cell values To: Ken Sloat Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, dmaengine@vger.kernel.org, alexandre.torgue@foss.st.com, mcoquelin.stm32@gmail.com, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, vkoul@kernel.org, amelie.delaunay@foss.st.com References: Content-Language: en-US From: Krzysztof Kozlowski Autocrypt: addr=krzk@kernel.org; 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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-20241205_080942_372433_2F5E838D X-CRM114-Status: GOOD ( 12.05 ) 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 05/12/2024 17:07, Ken Sloat wrote: >>> + 1. The mux input number/line for the request >>> + 2. Bitfield representing DMA channel configuration that is passed >>> + to the real DMA controller >>> + 3. Bitfield representing device dependent DMA features passed to >>> + the real DMA controller >>> + >>> + For bitfield definitions of cells 2 and 3, see the associated >>> + bindings doc for the actual DMA controller the mux is connected >> >> This does not sound right. This is the binding for DMA controller, so >> you are saying "please look at itself". I suggest to drop this as well. >> > > While logically it is the DMA controller, this doc is specifically for > the mux - the DMA controller has its own driver and binding docs in > Documentation/devicetree/bindings/dma/stm32/st,stm32-dma.yaml > > I can reference st,stm32-dma.yaml directly, but I was unsure if this > mux IP was used with another DMA controller from ST on a different > SoC. > > What do you suggest here? Thanks for explanation, I think it is fine. Best regards, Krzysztof