From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from codeconstruct.com.au (pi.codeconstruct.com.au [203.29.241.158]) (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 B0DE113635E; Wed, 18 Mar 2026 03:55:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.29.241.158 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773806138; cv=none; b=lSiahYKrGsmEGE8X6gqcW8YKrUb+8crn8rA2rJxRDHSfmDaGWwlLiukyXJc3N7IzFmEdd+zXnc+vxiTEv1lshDOJQr/aR1kZ9wELjvR0FJf8fRtOgw89v5ghutTXFGfScUK9/t4EBepnuP1sEXYGbYTA9V5dYUfwArGMDhAq12Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773806138; c=relaxed/simple; bh=XcCPj0djZ7iwvsvLXAAWU0n5yU8OTGIc1kAvZ/CFY3w=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=liCiSg1XD3zsFwlA9pQvpT6pF0QgCBr3mBx6clriKqEIlz6BYfXIuizx5j3ISSW436umMzBchePb3xq7TwTHOIgxqZCy88gEPh/cGqQf/xHaRVQTm6Ps5L4rNnH4Xn/ltaeQn+RBpZ8ZZZlbBhci9/vKPTwtvDHIPP6SKEz8zyQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codeconstruct.com.au; spf=pass smtp.mailfrom=codeconstruct.com.au; dkim=pass (2048-bit key) header.d=codeconstruct.com.au header.i=@codeconstruct.com.au header.b=ETg2cZME; arc=none smtp.client-ip=203.29.241.158 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codeconstruct.com.au Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=codeconstruct.com.au Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=codeconstruct.com.au header.i=@codeconstruct.com.au header.b="ETg2cZME" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=codeconstruct.com.au; s=2022a; t=1773806134; bh=XcCPj0djZ7iwvsvLXAAWU0n5yU8OTGIc1kAvZ/CFY3w=; h=Subject:From:To:Cc:Date:In-Reply-To:References; b=ETg2cZME6M6ho60BQ1zKAgYALPDMsyF2RAOX6zfhHWI+bdZp+BGK5bBpfFd9H0mTW aiphV7IDK/bb4zHyuGpJdyrLQ5fugH6PzttqLVSanSt5GXmc9CCOKKQl/tW8lxhmlC WLSNGYlk4sJwUBNur404RnG0EpKHGNGgkkbssZeAVFSNAVYLGzhBKH8Bb/gGZOEHa5 OxmSOrY6fYv7m4/EBxGZKfWbSUIKrRxpYS3VbOYJ1ApxPFyj0mQ3Gtr2Sz65u3YZ38 Cjfh33eBCWVyz9BxhygBdGPXm2xOU+1ZgvQnTkDdzyxo8vFACUoZmh4uQxIVMe79aN rxfnt/GXYSduw== Received: from pecola.lan (unknown [159.196.93.152]) by mail.codeconstruct.com.au (Postfix) with ESMTPSA id 0C0E860C33; Wed, 18 Mar 2026 11:55:32 +0800 (AWST) Message-ID: Subject: Re: [PATCH v26 2/4] dt-bindings: i2c: ast2600-i2c.yaml: Add global-regs and transfer-mode properties From: Jeremy Kerr To: Ryan Chen , Rob Herring Cc: "andriy.shevchenko@linux.intel.com" , Andi Shyti , Krzysztof Kozlowski , Conor Dooley , Joel Stanley , Andrew Jeffery , Benjamin Herrenschmidt , Philipp Zabel , "linux-i2c@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-aspeed@lists.ozlabs.org" , "linux-kernel@vger.kernel.org" , "openbmc@lists.ozlabs.org" Date: Wed, 18 Mar 2026 11:55:31 +0800 In-Reply-To: References: <20260309-upstream_i2c-v26-0-5fedcff8ffe8@aspeedtech.com> <20260309-upstream_i2c-v26-2-5fedcff8ffe8@aspeedtech.com> <20260313232125.GA3618633-robh@kernel.org> <7ae8222bf6abd83a3c2ac976f54a2edbe4e9727a.camel@codeconstruct.com.au> <071adc5f76b71b3e8d2691945e7b178602b285f9.camel@codeconstruct.com.au> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.46.4-2+deb12u1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Hi Ryan, > Do you mean sysfs select support mode selection(byte, buffer, dma) > Or just force byte mode?=20 I would think that the best approach would be a mechanism to specify the mode - either byte, buffer, or DMA - if DMA is indicated as available to the controller. Cheers, Jeremy