From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id D4FB93C2790; Wed, 24 Jun 2026 14:25:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782311153; cv=none; b=YGRicFudXN+doXRJycCGwZor2Dw5S6fS+MINUUQb6UgKOqusCHxFx2pT6xHE+t5erx77Q+o8gngL6kEuo3DEfHgCtn4ZZ1LhB/YZckJX/E6HztyH5Okj7E6o3hDhHjmE56vwFWWK208spXg/uQziGlxMIJvK6lFZgMtZcjk3MDM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782311153; c=relaxed/simple; bh=mrPwdf7xd6wsMAEeiR43UBAbY0NnohDZgj25KrzbEkQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=RiKF9RYSvcoi67qu2JZM4TCmCjRfJW1O/nApBwMNBxqFzGyn40phkbGzQCktWNPmNy/oqJU+ccjGELVrAyN5Aqdv0CXJ/zAZ7/GdOtLctCQHRHxX8PRvztJtskmSIbeIV/V4Siw84E+L+CNFMO08t9hGOhA0dL3Oyiqxtfi2hm8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=Cj2M1i6D; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="Cj2M1i6D" 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> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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> 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