From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CDB8F1CD2B; Thu, 5 Dec 2024 16:09:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733414981; cv=none; b=JCt4lZ34yHfVxQceYZDzssdVW94iTSD4YDEKYydHEfYd3aNQZ4NQ/+gT0itu8LTjFpBsSAmzDS3CXi/GWoFQHel+ROTfs56XGJLk1pXjIWV5bnwwjdowFP9yNIZ/E8BzDp2WpjWFyJi9SsBjQUeNxVfP6n7/V5KA2fNr76cF03o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733414981; c=relaxed/simple; bh=BI10j7N0jmfF33MEnsfZwYICaNRriKAkr2hC+nrTV4M=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=kanru5st0xr85/HT660dqELS1uuOvLnqizsODNOpF5VXeIhZMfN3phhsYkMAUrqaUT5Hqa4A0ymksCQQ0re8x5xeg7jJvLTRy58InI2sDNIcurKOLXW1Y14wyR6IxYQ/ii1gMBMunkTlyXNFI0dEoSMZzrIj+A9bZ8mRHnH1aUY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZpDheFUQ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZpDheFUQ" 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 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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