[{"id":3677838,"web_url":"http://patchwork.ozlabs.org/comment/3677838/","msgid":"<177629119770.789152.6115453884565821746.robh@kernel.org>","list_archive_url":null,"date":"2026-04-15T22:13:18","subject":"Re: [PATCH v5 1/4] dt-bindings: interrupt-controller: Describe\n AST2700-A2 hardware instead of A0","submitter":{"id":62529,"url":"http://patchwork.ozlabs.org/api/people/62529/","name":"Rob Herring (Arm)","email":"robh@kernel.org"},"content":"On Tue, 07 Apr 2026 11:08:04 +0800, Ryan Chen wrote:\n> Introduce a new binding describing the AST2700 interrupt controller\n> architecture implemented in the A2 production silicon.\n> \n> The AST2700 SoC has undergone multiple silicon revisions (A0, A1, A2)\n> prior to mass production. The interrupt architecture was substantially\n> reworked after the A0 revision for A1, and the A1 design is retained\n> unchanged in the A2 production silicon.\n> \n> The existing AST2700 interrupt controller binding\n> (\"aspeed,ast2700-intc-ic\")was written against the pre-production A0\n> design. That binding does not accurately describe the interrupt\n> hierarchy and routing model present in A1/A2, where interrupts can be\n> routed to multiple processor-local interrupt controllers (Primary\n> Service Processor (PSP) GIC, Secondary Service Processor (SSP)/Tertiary\n> Service Processor (TSP) NVICs, and BootMCU APLIC) depending on the\n> execution context.\n> \n> Remove the binding for the pre-production A0 design in favour of the\n> binding for the A2 production design. There is no significant user\n> impact from the removal as there are no existing devicetrees in any\n> of Linux, u-boot or Zephyr that make use of the A0 binding.\n> \n> Hardware connectivity between interrupt controllers is expressed using\n> the aspeed,interrupt-ranges property.\n> \n> Signed-off-by: Ryan Chen \n> \n> ---\n> Changes in v3:\n> - squash patch 5/5.\n> - modify wrap lines at 80 char.\n> - modify maintainers name and email.\n> - modify typo Sevice-> Service\n> Changes in v2:\n> - Describe AST2700 A0/A1/A2 design evolution.\n> - Drop the redundant '-ic' suffix from compatible strings.\n> - Expand commit message to match the series cover letter context.\n> - fix ascii diagram\n> - remove intc0 label\n> - remove spaces before >\n> - drop intc1 example\n> ---\n> .../interrupt-controller/aspeed,ast2700-intc.yaml | 90 ----------\n> .../aspeed,ast2700-interrupt.yaml | 188 +++++++++++++++++++++\n> 2 files changed, 188 insertions(+), 90 deletions(-)\n> \n\nReviewed-by: Rob Herring (Arm) ","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-aspeed@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=fxNxNToF;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1776291199;\n\tbh=qSg+kNESVJo61aBZDdNgiU9KJvIQqTHcGul9KHiHi/g=;\n\th=Date:From:To:Cc:Subject:References:In-Reply-To:From;\n\tb=fxNxNToFUFgjmJk98CnKj500nmscrXFmTs1IfgrgSZPhnw59DyVmfurlClhf+rMYr\n\t I///l/oCbWV4sZ0F0VUO3JewFiCHHrGIgQJfXN0Ns7Nz9UWl08WCTDSGuh6fjAdOR8\n\t 2E4PH1Ggh04LhZv16g9lS9XbtJrjFd1fmKl9sc12Yw0Hjtl3ULi8UAWTWMPTPJeZJF\n\t 4oxpWyqFS6JdjI7/0YDl4r9Yk9HYj6P8+SdskXzIpRCYNG/izu+hSnO4ndHdHg751S\n\t E+PL4D0LEyDAmI0q/Swnu+FWkuSWvPFKIVCz/MPm9/ckFZxN1EHV+W/3OKW2T0DOFd\n\t Ysohiw6Q4gByQ==","Date":"Wed, 15 Apr 2026 17:13:18 -0500","From":"\"Rob Herring (Arm)\" ","To":"Ryan Chen ","Cc":"linux-riscv@lists.infradead.org, Joel Stanley ,\n\tAlbert Ou ,\n\tPalmer Dabbelt , linux-kernel@vger.kernel.org,\n\tPaul Walmsley , devicetree@vger.kernel.org,\n\tKrzysztof Kozlowski ,\n\tConor Dooley , linux-aspeed@lists.ozlabs.org,\n\tThomas Gleixner ,\n\tAndrew Jeffery ,\n\tAlexandre Ghiti ,\n\tlinux-arm-kernel@lists.infradead.org","Subject":"Re: [PATCH v5 1/4] dt-bindings: interrupt-controller: Describe\n AST2700-A2 hardware instead of A0","Message-ID":"<177629119770.789152.6115453884565821746.robh@kernel.org>","References":"<20260407-irqchip-v5-0-c0b0a300a057@aspeedtech.com>\n <20260407-irqchip-v5-1-c0b0a300a057@aspeedtech.com>","X-Mailing-List":"linux-aspeed@lists.ozlabs.org","List-Id":"","List-Help":"","List-Owner":"","List-Post":"","List-Archive":",\n ","List-Subscribe":",\n ,\n ","List-Unsubscribe":"","Precedence":"list","MIME-Version":"1.0","Content-Type":"text/plain; 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