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 8B647266B6C; Fri, 24 Oct 2025 06:50:35 +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=1761288635; cv=none; b=F+07VYDOZ93RnGLazme53bne20XFi16lcV7NYGzjdcVK7rfYFTEZJp7xcvZ4bS1RvhtOXzUMBviYIM9qU2q10cesn1v3u+QeDunpVoNT9A6v/fHLcaQLmRRDU/jxieuoLpGC84uJsjmyL7neAcu5FDcwPf0WnLi8XIDsS15ruLA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761288635; c=relaxed/simple; bh=hYEnbcOJYjrtPHsdgzonyGHvHkZXHzA2RgBGxgo1qmA=; h=Message-ID:Date:MIME-Version:Subject:From:To:Cc:References: In-Reply-To:Content-Type; b=NoIqXw+DCX93LGKrCsq8M3Pq57JiJ/89vUAWJRHCiuaGRpPbckgIkB7ecmfiOhw1rHhSnX7G+mSSPefX556vTwcfhcB+ktkoa4PTCr0m+TLps+fp5CW8/zbxmLLR+zwE83NGJD7xTbeweIdgfJAwactYNbdVPUa6HBPvyO1Nxio= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Jo+eQ3hM; 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="Jo+eQ3hM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 35271C4CEF1; Fri, 24 Oct 2025 06:50:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1761288635; bh=hYEnbcOJYjrtPHsdgzonyGHvHkZXHzA2RgBGxgo1qmA=; h=Date:Subject:From:To:Cc:References:In-Reply-To:From; b=Jo+eQ3hMzJeyo0I4DyY9O3gc9vris5Cz+NHyYdQaTOByTRvcSTQrMfutiqRnVG3dM TkCcHhs9iJSHEqErQuQ9DlxEUHLPtzjWBGxb7kJDqzTkdONPqG+/EB2Tat0H7uDc69 u0IkjwZIq4hhtPlIQBZSWCiYMYESmlBCHd4+Y+3GCBFx+E+FejU2JqboSmp3wnaF9m 3y2A7VEoSZJcuE1GWb09q5DoGsOLJ5dXFv201k62l/BaHqV5OIczojzzymMTLuIZGh 14Ku9XXIeBwr7VnNNkuNLdIykb29ByymePEc8gx+Qr64B2OmMTR2tEWyjvw657ZdBN gBQE4urb4khCA== Message-ID: <2939cae6-2e8a-4528-8e27-8c932e2f82de@kernel.org> Date: Fri, 24 Oct 2025 08:50:29 +0200 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 v20 1/4] dt-bindings: i2c: Split AST2600 binding into a new YAML From: Krzysztof Kozlowski To: Ryan Chen Cc: benh@kernel.crashing.org, joel@jms.id.au, andi.shyti@kernel.org, jk@codeconstruct.com.au, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andrew@codeconstruct.com.au, p.zabel@pengutronix.de, andriy.shevchenko@linux.intel.com, naresh.solanki@9elements.com, linux-i2c@vger.kernel.org, openbmc@lists.ozlabs.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org References: <20251021013548.2375190-1-ryan_chen@aspeedtech.com> <20251021013548.2375190-2-ryan_chen@aspeedtech.com> <20251024-dark-ringtail-of-defiance-1daabd@kuoka> Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 24/10/2025 08:45, Krzysztof Kozlowski wrote: > On Tue, Oct 21, 2025 at 09:35:45AM +0800, Ryan Chen wrote: >> The AST2600 I2C controller is a new hardware design compared to the >> I2C controllers in previous ASPEED SoCs (e.g., AST2400, AST2500). >> >> It introduces new features such as: >> - A redesigned register layout >> - Separation between controller and target mode registers >> - Transfer mode selection (byte, buffer, DMA) >> - Support for a shared global register block for configuration >> >> Due to these fundamental differences, maintaining a separate >> devicetree binding file for AST2600 helps to clearly distinguish > > No, that's not a valid reason. You just moved the compatible and are > still 100% identical, at least according to this commit msg, so there is > no point in this patch. > Although now I saw next patch, so clearly this commit is incomplete. You mention here almost insufficient arguments which should not make you make the split, instead of making the actual argument - bindings are completely different. ... and then we see that bindings are not completely different and there is no problem in this one file serving all devices just like for many other cases. You just need allOf:if:then: section to narrow the constraints/presence of properties. Just like we do for all of the other devices, really, just look at other bindings. Best regards, Krzysztof