From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 649EC370D77; Mon, 8 Jun 2026 12:25:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780921557; cv=none; b=bXK9JsUyKzZ3D2e4TNPA3K+rPGc5+ZWLc0aweBvIdJ8xo6kZPv1d1f/wxOyFo68fyVKhyCn/4vMWgxeJXQhenfwX4LI27FM+FJQ+WYFueMjEMAdKNOLt4OMG6cH8GrKWBC2If8fM51H2D9Y+2DxwEyvcUK4CrKU+ibWpinacH38= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780921557; c=relaxed/simple; bh=bVNkUabo3ud/anBTQclICpClAeW+v9Y1/MAmmG41WCk=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Hm5D3OT6R0AbhUa5ZoCWk1YsX9O0FVni7yS4/4XY2GQY15mOOzcabkc2sXNn9QPkZFTD3Q4q6UIomLE0XyJbuDkJqHoSackQjB4Xvk+TBb8aL6ynxGcbJIQapTDXP1g7RxN1+wzxuo0EVOFBsnIr83IccsCcFbUI0cGFx5Kc5rc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=V3WRTkbD; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="V3WRTkbD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B69541F00893; Mon, 8 Jun 2026 12:25:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780921556; bh=/Px+lEFLWyOaHo3lYbp1kWR77jypN2bFXFXDA78CNVk=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=V3WRTkbD/fyG7qVnat2T+yLd7z43oQ68pKRYVWkz7cRlXkij3PZ87gYVQTbtD6aU8 9388B9lwCkR7z9ole+pT4OQ1Y1nCg6E2udVqPdVvQjIlVs2j7sXgPn1L7BQoyJnDjU DYkDiO3D/CgAEEJdt3U8Z8G4xtK3KqIzDBeO7jkHrrDiN1+IVeMDJQwD/183y3gDsY QKtV/PHGVw42pkCZsZcuEtjCqROPwBw+cqvPbtBLMBAEpiAuN+QtRKAMJQHLBfKwer eIoA6OixdDWYIvQiOtUCBBIZ5ZDdzd3rKbDaHctnx8e9l43AgMBs7/ydxV7/G6ht0v gXdpFuJgapk2A== Message-ID: Date: Mon, 8 Jun 2026 14:25:49 +0200 Precedence: bulk X-Mailing-List: linux-omap@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] dt-bindings: mfd: syscon: Disallow simple-bus with syscon To: "Rob Herring (Arm)" , Krzysztof Kozlowski Cc: Aaro Koskinen , Conor Dooley , Kevin Hilman , linux-kernel@vger.kernel.org, Tony Lindgren , Andreas Kemnade , Krzysztof Kozlowski , linux-omap@vger.kernel.org, Roger Quadros , Lee Jones , devicetree@vger.kernel.org References: <20260531110404.12768-3-krzysztof.kozlowski@oss.qualcomm.com> <178060921244.1298375.8605331769477177888.robh@kernel.org> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 04/06/2026 23:40, Rob Herring (Arm) wrote: > > On Sun, 31 May 2026 13:04:05 +0200, Krzysztof Kozlowski wrote: >> "syscon" is a system controller with registers having their own >> functions, thus not really a trivial MMIO simple bus. "simple-bus" on >> the other hand is just a bus on which multiple devices sit and the >> "simple" means no functions are allowed here. >> >> Combination of both "syscon" and "simple-bus" is abuse of DT for easier >> instantiating of Linux device drivers so add a schema to disallow that. >> >> Unfortunately there are a few old cases of that patterns, so add >> exceptions: >> >> 1. "cznic,turris1x-cpld" and "img,pistachio-cr-periph" are already used >> in upstream DTS. >> >> 2. TI has several DTSI with a child of SCM device (e.g. "ti,am3-scm") >> using "syscon" and "simple-bus" but without a dedicated compatible >> documented anywhere. Add new compatibles for such cases. >> >> Signed-off-by: Krzysztof Kozlowski >> --- >> .../bindings/mfd/syscon-common.yaml | 27 +++++++++++++++++-- >> 1 file changed, 25 insertions(+), 2 deletions(-) >> > > Acked-by: Rob Herring (Arm) Thanks for ack, but this is partial patch on top of my earlier work which I forgot to squash here. I will send a v2 without the ack. Best regards, Krzysztof