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 8FE87CDB481 for ; Wed, 24 Jun 2026 14:26:04 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=mrPwdf7xd6wsMAEeiR43UBAbY0NnohDZgj25KrzbEkQ=; b=2rCiB/ItzGELjing+wrENc5C7B TqA0jFYHzYIAQADa6ZwcRKkvrc5/qcH/qoNG7dfzSFHStmuQT/Nag4vsgsDRnsP1dJKugcL8hJZDF HYs0hquOu5ooIqVRzKtXHdptwbVy91P6ptqYG1W0WWgOa/yBidqTp7Nj39ieGVZdegx3HCyI6w8xZ gQiEez1VbkY6dgLbXaZWviSIU6LvJHTogQ6+Afh7x3v1vALU+fF/bMew6b/O0QUeJfBkG92CUX6dB WZ/BqYnzE/owJxTCVXRF1njJbBKt5NtjY3OuccfFxOtFOm7Wav1vWZXrz3mkI4T6gu53rZ+w64y1S 5Gfu0slw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wcOY8-00000007uhA-3YrP; Wed, 24 Jun 2026 14:25:56 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wcOY6-00000007ugf-0wZ2 for linux-arm-kernel@lists.infradead.org; Wed, 24 Jun 2026 14:25:55 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9C90816F8; Wed, 24 Jun 2026 07:25:46 -0700 (PDT) Received: from localhost (unknown [10.2.196.114]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C61093F62B; Wed, 24 Jun 2026 07:25:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1782311151; bh=mrPwdf7xd6wsMAEeiR43UBAbY0NnohDZgj25KrzbEkQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Cj2M1i6Dx+mt5UzZtg8FO5AC6jgoy0UVWsf/4h/jZibDruozT78wSezGv6jazfphx i2X+vV1Oy4mjRR41FVO3KFEuvymsAJW1E5QvCAnBtcWu8SU5tFsBaXO4e3k0+sVPNt nqN0bzHSO3abZSw5baI1i1sz7UXJpcv/DKrUXaRI= Date: Wed, 24 Jun 2026 15:25:48 +0100 From: Leo Yan To: Jie Gan Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Tingwei Zhang , Jingyi Wang , Abel Vesa , Suzuki K Poulose , Mike Leach , James Clark , Yuanfang Zhang , Konrad Dybcio , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v2 2/2] arm64: dts: qcom: kaanapali: fix traceNoC probe issue Message-ID: <20260624142548.GA575984@e132581.arm.com> References: <20260624-fix-tracenoc-probe-issue-v2-0-786520f62f21@oss.qualcomm.com> <20260624-fix-tracenoc-probe-issue-v2-2-786520f62f21@oss.qualcomm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260624-fix-tracenoc-probe-issue-v2-2-786520f62f21@oss.qualcomm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260624_072554_337992_79310BBA X-CRM114-Status: GOOD ( 11.12 ) 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 On Wed, Jun 24, 2026 at 05:49:26PM +0800, Jie Gan wrote: > The AMBA bus attempts to read the CID/PID of a device before invoking > its probe function if the arm,primecell-periphid property is absent. > This causes a deferred probe issue for the TraceNoC device, as the > CID/PID cannot be read from the periphid register. > Add the arm,primecell-periphid property to bypass the AMBA bus > check and resolve the probe issue. tnoc.c registers both an AMBA driver and a platform driver. Shouldn't it be registered as a platform device instead? Thanks, Leo