From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9F357CD4F3C for ; Mon, 18 May 2026 11:22:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:MIME-Version: Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Date:To:From: Subject:Message-ID:Reply-To:Cc:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=w2n0G2+Jazj7BtyrJBZLOCheDF0NMvvyn9XJCPYHCN0=; b=UlJ3ASAJRWg2we/w1R0WDAnS1G C4LWAfZMJgogaXasDEMT9nVVrKsRLD1CpP7typ1VCKpI9VIVrAtu8kgGqr5z1c5uKajDxKrK7tF1d pFnLSx+tijgdbwHngeIb/NTT2xszbhVvlyT0apmS3af4b+McsoXKsUZm2gEr244rd0b4gUQ6oNsoN Lx4/2S3SyQGLeFg5AUP7GKrswzd/f9OkGh8+Fd/Cksrsz7PjegGf/ieMJivYPSyvp/21z74zt3Qqb VNFJ6tZOirEXpS4axKiir/RuvKueImeye/GwbyhPK/OVHZmSRTXgjw1ee+87NXTvREbIaEIRqPpoz xfHwLW6w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wOw31-0000000FPbv-47MX; Mon, 18 May 2026 11:22:12 +0000 Received: from pi.codeconstruct.com.au ([203.29.241.158] helo=codeconstruct.com.au) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wOw30-0000000FPbK-0F4Q for linux-arm-kernel@lists.infradead.org; Mon, 18 May 2026 11:22:11 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=codeconstruct.com.au; s=2022a; t=1779103322; bh=w2n0G2+Jazj7BtyrJBZLOCheDF0NMvvyn9XJCPYHCN0=; h=Subject:From:To:Date:In-Reply-To:References; b=myqoaJPzPyi+al1ubYSV7anQy9yZQTl1plzyC4g+tWiGfye3dcGdVLplqjgQJ73NO qXaY1nm0hrrXiVov2hXCCZYBLMZa0LY11XCaVutXw0bCkmNwizNfInjC5d9ythy+4+ coIQVM5ddaRgAmttQpeKxosnh1Ub4ijCFfhhBSEAdFx/2jAbbHMjl2xnFAEBh7ayxB 18LWYKqiio2Ug5Jdk5VWe+q/zusQiUta4iwjmoSoElSxROC97srr4qI9pZ2Bt3f7GX p0Cvo1uBUfOP7kGNCab0sRT4ettc/oU71nbxM5GvJkwA8Fa9TTzaUNKaS+UUTU5FTG 2lc06OwsWtWsg== Received: from [192.168.68.117] (unknown [180.150.112.11]) by mail.codeconstruct.com.au (Postfix) with ESMTPSA id 67FB76054D; Mon, 18 May 2026 19:22:02 +0800 (AWST) Message-ID: <88d92981e89a9c6c62b6ddc2fa4af51dcc32c276.camel@codeconstruct.com.au> Subject: Re: [PATCH v2 1/1] ARM: dts: aspeed: santabarbara: Add system monitoring GPIOs From: Andrew Jeffery To: Fred Chen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joel Stanley , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org Date: Mon, 18 May 2026 20:52:02 +0930 In-Reply-To: <20260421130344.2751662-2-fredchen.openbmc@gmail.com> References: <20260421130344.2751662-1-fredchen.openbmc@gmail.com> <20260421130344.2751662-2-fredchen.openbmc@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2-0+deb13u1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260518_042210_354590_16CB9701 X-CRM114-Status: UNSURE ( 6.48 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Fred, On Tue, 2026-04-21 at 21:03 +0800, Fred Chen wrote: > Add several GPIO expanders to the Santabarbara platform, with ioexp0 > (0x20) configured to aggregate interrupt signals from downstream > expanders to optimize sideband pin usage. Can you provide a bit more context? Is this the result of a broader design change? Or is it a case of adding descriptions of hardware that was already present in the design? Andrew