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 95708446B4; Wed, 17 Jul 2024 09:39:16 +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=1721209156; cv=none; b=sO+7ncPl9uhg3gg+a1CVGD9r5BYMzB0FziA5RQpQPyzblChIQcnmwsWX1zC5N2pDKXeB+r+FdSVopI/wWNi+nR7F93rAfe5VwHI5FYJ2ZcnlfJXjNbCE5+YPCP2FD/35tKEmliQE9MlrjVC3OuPXPz95TGXzHeu3/uz9uhdX5yI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721209156; c=relaxed/simple; bh=bQmiL04uei3wZr6LpWjoMYZBMy7Ujc3v3PupBMdFZNs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ogcaSOIhI2NGBqAJqgEle/oGJTL/ozk5TJI/wU6ARg+hOiGLqlN1nqa1610s2sDtObz42DNRQipBY3q3nNw/w4dPW8LbhLvZzEvUMfjZ4xDtBiKVIEeaaNeim5QKFLObcCM++5cYet8LtDvpDphLAlBqMdM48GGI5HoDHa5akOY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=R3nHDrOD; 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="R3nHDrOD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AB865C32782; Wed, 17 Jul 2024 09:39:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1721209156; bh=bQmiL04uei3wZr6LpWjoMYZBMy7Ujc3v3PupBMdFZNs=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=R3nHDrOD4BH+FrNfytFa2wNHK8U5yM5krpSDx+phY74rT3kqT8GbCvpmlHoMZr70x oukSUdP8IipAmQPb8TjbTZ8XQSa2flty6eQOfBDrUWO1ICSmfPIW/zNe/u7Z17fIcC x2SfrFQYMZ+SlQfioIj+U5ZjbEBqwOYn2+QVqagTY6/PkWfYg207rpvl0I3E04ez3T o1GV5lEm//UfpLhw5PsRBJAR9zcf+p032BC/PmcpQveUqRoj7bJ7E3rMrVI4KXGVKt R2DpFidpxmqkqvZ8P4xSBfcMpNUmS5WfzUzk3Cwb1B5/7eypSpmOezGzV5Qs5UbIHR js8B9NoIGyDCA== Message-ID: <8f9c3428-c5fa-462b-af9b-0224976a1165@kernel.org> Date: Wed, 17 Jul 2024 11:39:08 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 2/4] ARM: dts: rockchip: remove unlikly-to-exist DAC from elgin-r1 To: Conor Dooley , linux-kernel@vger.kernel.org Cc: Conor Dooley , Dinh Nguyen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Huacai Chen , WANG Xuerui , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, imx@lists.linux.dev, loongarch@lists.linux.dev References: <20240717-anvil-ashy-544e80a1317c@spud> <20240717-parrot-malt-83cc04bf6b36@spud> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 17/07/2024 11:37, Conor Dooley wrote: > From: Conor Dooley > > The Rohm dh2228fv (really the bh2228fv, the compatible in the kernel has > a typo) does not support frequencies above 10 MHz, nor per the > datasheet appear to use either CPOL or CPHA. I suspect that this > devicetree is abusing the compatible in order to bind the spidev driver > in Linux. Pretending to have devices on a board for this purpose is not > acceptable, so remove it. > > Signed-off-by: Conor Dooley > --- > I could not find any documentation for this board online, and it does > not blatantly say that the device is a "spidev" like other [ab]users, so > it is possible there's actually a DAC here - but I doubt it is a > bh2228fv given the other incompatibilities. Reviewed-by: Krzysztof Kozlowski Best regards, Krzysztof