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 053C819D8A8; Sun, 27 Jul 2025 09:36:27 +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=1753608988; cv=none; b=bMSxzvhXYPPPdAe4KpSawyiRw3VKSdA+t6C+4k5MoB6yoNCk9VoKw0/z7/WWLqOY+P0/TPX0DkqrdfmxMwmtPJR6pCL3Ukys9lQqS+fp4BIEEzNnmGfI7aG5Ne7LunLBqD3npPu2g9Zjs95981Hlv/tuxFXxsjsjM//vHdA91Bc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753608988; c=relaxed/simple; bh=3KwHDBXWQOpr86hh/WgXBV9m9JGz7kpYAsJ27ibYkBc=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=YLSjFRpwDLwBRtW3JR3YYzsLD66ih3IvuerRO1PX/It8JyL5MD3rtxNwMsWSalFYZobHUY0bXtTqJe94q7DcFIxEtem5kH9UR0xw0GcG66HbNLfTfINqHE6QfT3apKFMcmc0BMtBZ5DTNQYpP66VC+yH8VNi/NQZN/RoTdfUNAQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CleSKY6o; 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="CleSKY6o" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B6F0FC4CEEB; Sun, 27 Jul 2025 09:36:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1753608987; bh=3KwHDBXWQOpr86hh/WgXBV9m9JGz7kpYAsJ27ibYkBc=; h=Date:Subject:To:References:From:In-Reply-To:From; b=CleSKY6oYIOqUNNodUPeJS3HEm1Cv7ET2XDHb9qBTv6RGO+5Yr8v4eGzHmMUbsQOv KnEG9Y+kBRcXsgUGzPbgazE/Ro7TV5N520M3eFXqib0dd/jbn3rfhclfK1VstmRkzn IC0BDYxMawwO/SREWuVmP5qmJzaUMoAvTDKXk+mfs7JdyKObpTG74RMqaVNPT1EKaO jMs/ZarvFq50IN5/GNPZYnMr8dkoL9RilmsfWBT4UBSddoFOK08SzZnj6Xxy+M+5hY 8ez8LzAEeiAlsCk7b3CQjpLGijkqtTdtGWN/fDo4+6QcMCk1NY8lbDX62emxhIV9P0 6hIRJVdwg+FPA== Message-ID: Date: Sun, 27 Jul 2025 11:36:23 +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 v3 1/2] dt-bindings: interrupt-controller: aspeed: Add parent node compatibles and refine documentation To: Ryan Chen , Thomas Gleixner , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joel Stanley , Andrew Jeffery , Kevin Chen , "linux-kernel@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-aspeed@lists.ozlabs.org" References: <20250722095156.1672873-1-ryan_chen@aspeedtech.com> <20250722095156.1672873-2-ryan_chen@aspeedtech.com> <001d37c7-f704-4554-a4db-0cc130e07dd6@kernel.org> <384635a3-c6ed-44f8-a54a-2b20e20694cd@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 27/07/2025 03:47, Ryan Chen wrote: >> Subject: Re: [PATCH v3 1/2] dt-bindings: interrupt-controller: aspeed: Add parent >> node compatibles and refine documentation >> >> On 23/07/2025 10:08, Ryan Chen wrote: >>>> Subject: Re: [PATCH v3 1/2] dt-bindings: interrupt-controller: >>>> aspeed: Add parent node compatibles and refine documentation >>>> >>>> On 22/07/2025 11:51, Ryan Chen wrote: >>>>> + INTC0 is used to assert GIC if interrupt in INTC1 asserted. >>>>> + INTC1 is used to assert INTC0 if interrupt of modules asserted. >>>>> + +-----+ +---------+ >>>>> + | GIC |---| INTC0 | >>>>> + +-----+ +---------+ >>>>> + +---------+ >>>>> + | |---module0 >>>>> + | INTC0_0 |---module1 >>>>> + | |---... >>>>> + +---------+---module31 >>>>> + |---.... | >>>>> + +---------+ >>>>> + | | +---------+ >>>>> + | INTC0_11| +---| INTC1 | >>>>> + | | +---------+ >>>>> + +---------+ +---------+---module0 >>>>> + | INTC1_0 |---module1 >>>>> + | |---... >>>>> + +---------+---module31 >>>>> + ... >>>>> + +---------+---module0 >>>>> + | INTC1_5 |---module1 >>>>> + | |---... >>>>> + +---------+---module31 >>>> >>>> You binding also said intc1 is the parent of intc-ic, so where is here intc-ic? >>>> >>>> This diagram and new binding do not match at all. >>> >>> The corresponded compatible is following. >>> >>> +-----+ +---------+ >>> | GIC |---| INTC0 | -> (parent : aspeed,ast2700-intc0) >>> +-----+ +---------+ >>> +---------+ >>> | |---module0 >>> | INTC0_0 |---module1 >>> (child : aspeed,ast2700-intc-ic) >>> | |---... >>> +---------+---module31 >>> |---.... | >>> +---------+ >>> | | +---------+ >>> | INTC0_11 | +---------------------------- | INTC1 | -> -> >> (parent : aspeed,ast2700-intc1) >> >> AGAIN (second time): that's not what your binding said. >> >> Your binding is explicit here, which is what we want in general. It says that inct1 is >> one of the parents of intc-ic. ... and you never addressed that. :/ >> >> Let me be clear, because you will be dragging this talk with irrelevant arguments >> forever - changing this binding is close to no. If you come with correct arguments, >> maybe would work. But the main point is that you probably do not have to even >> change the binding to achieve proper hardware description. Work on that. >> > > If I do not change the binding, I think the yaml and dts can still fit the interrupt > nesting architecture by using both interrupts and interrupts-extended. > > For first-level controllers, use the standard interrupts property > (e.g. with the GIC as the parent). > > For second-level INTC-IC instances, use interrupts-extended to refer to the > first-level INTC-IC, following common Linux practice for stacked interrupt controllers. > For example: > dts > // First level > intc0_11: interrupt-controller@12101b00 { > compatible = "aspeed,ast2700-intc-ic"; > reg = <...>; > interrupt-controller; > #interrupt-cells = <2>; > interrupts = , ...; > }; > > // Second level, cascaded > intc1_0: interrupt-controller@14c18100 { > compatible = "aspeed,ast2700-intc-ic"; > reg = <...>; > interrupt-controller; > #interrupt-cells = <2>; > interrupts-extended = <&intc0_11 0 IRQ_TYPE_LEVEL_HIGH>; This looks like changing the meaning of the interrupt. What was the interrupt here before? What interrupt is here now? > }; > In yaml, I can use: > oneOf: > - required: [interrupts] > - required: [interrupts-extended] > This allows both cases to be valid. Hm? Since when you need both cases? Best regards, Krzysztof