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 760EDC43458 for ; Thu, 9 Jul 2026 09:02:30 +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:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=EOoqpkxalQnGgn2rNAM92KHFKF9kGa/rlb46Hia6Qak=; b=wazxLV74jba0361dtXBiRMcBBV WZGxV5jm5lYboF5/SmtIH+v5+5/I1BXDMppuKZR4hzIJsZPEgooom4/cxRXsuAwDVqGkjO/wcuVts 7pXj634oAhU/pUvkBnWj5iH73oiX8ucwEhIrwXuK0/yTDsBJQ5FUAghop+zyJSNPnqWbrRZ3W6jkr PSzerfut1sX5/FdH6mNVYAT3WNITQ9nAq0ekss4ZwndB8ah34bOhahcDtZedsW52YjFbC8H/4T5LC Q9IKrSXvPT2DVNx0dnOGTmpsiCuO/tQurzs29K9MzITq4s962hIqjpZhRDrMXzYSY3NvPnfvPkK04 qGZfM3OA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1whke9-00000001hzJ-0JBW; Thu, 09 Jul 2026 09:02:17 +0000 Received: from mx0b-0031df01.pphosted.com ([205.220.180.131]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1whke6-00000001hya-3pQa for linux-arm-kernel@lists.infradead.org; Thu, 09 Jul 2026 09:02:16 +0000 Received: from pps.filterd (m0279870.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 66960HHL887989 for ; Thu, 9 Jul 2026 09:02:14 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= EOoqpkxalQnGgn2rNAM92KHFKF9kGa/rlb46Hia6Qak=; b=AulfuAlmG2nMc/yj QmLRWmYJZcbVBduUxmvmp/+QQOfbcw1XNli9D1qps4BTCWRJV+YgY+Z6/tA7Swpl YZdtE0exoFj6K8e+VJ1sfaEFl7/M4plsnVAvPX4Yoll8azBclSgTe1K7Zbp9h4Sa ztEjjJkSwy0Uxdx7NxiJqgZFvFPeW/49I2iy4ycArnnVmwQN9hGf+9HKy7VHEfaO DkdP5XTNJ/SRuEERvwY3TdRWwvKCF3r5aS+CPCbJcE/Y/KztnemFrKM9pALTWyVM 332VS3PU2dYPIoDjpnFc/bqMpAkS2Ibh/DWKWciZQlb7HhAmpWh9Wr3EKt0iATwE MOHVcA== Received: from mail-pj1-f70.google.com (mail-pj1-f70.google.com [209.85.216.70]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4f9rq33puw-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Thu, 09 Jul 2026 09:02:13 +0000 (GMT) Received: by mail-pj1-f70.google.com with SMTP id 98e67ed59e1d1-3810960140eso3213094a91.2 for ; Thu, 09 Jul 2026 02:02:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1783587733; x=1784192533; darn=lists.infradead.org; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to :content-type; bh=EOoqpkxalQnGgn2rNAM92KHFKF9kGa/rlb46Hia6Qak=; b=NsJicFlah8w0/s8r/CcHItU7C0QCt3Ke4LF16c5HPEOCqoGaNxKgOEv/coTpENKDVr lbb7t+N0PkQIa0iuTVWI8P+SYWRMWB9/FX8+41JdLYiR6KIitm7GCUtsacBDj1zW+FME gYgnH/hXHSTkpWtztfv2YWLJnBZwlm6Tqhc/quJPapzVlekoXpcLNzJExNlNfLe/F1Hb V6/bdWZEuQQKRejHfPOBQHj/wGVWJrS1dAK2RSmUxvNE0hMrZBTROXLB/hXrn/ve4tom W+wc2jOZbNpZtTHAvT7MQqO59+FpDGczmk/D68rD+ayq/k7ywJdehZ1db8ECpKEQyoVO TxDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783587733; x=1784192533; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=EOoqpkxalQnGgn2rNAM92KHFKF9kGa/rlb46Hia6Qak=; b=d1WBb456PJY1Gi1b8ezqriX1qolF3mjmoJ8gLBKDiZm9nb+1alJda6ijsDp0ksAFG1 VRkdLiork1/DD4HmBVgxtCL+iU5DNAUvlvZqrPLC38jpftteFhv3gC3wkXDrkzyXJz4g T/uIp/wE6flPgo7FwbPlVEAFQ/ub4NuAbVDwbt1Tl6gPcADK/xgBwDwE96KofsX9iwA8 XIbMHq4vrVQ/6yVhg1Vk+5LVkUGTQwtyYnKd3KkppDAs37PT7d50uXm5x6Ozf43jmo/V QBOXHd7oRzf1wbWgY40bGkKlNeN6sX/tK3eImGIxjVqabzgQBkd4wkJBp/r2WvtNlgm7 F50Q== X-Forwarded-Encrypted: i=1; AHgh+Rr3kIJQL/pI1JXT4lFM9TyASRHNbLW5VfKKUjXij2opelyChv2PmG2/SdVm6352Yf0hjljWUlInZHsERgSE0v4v@lists.infradead.org X-Gm-Message-State: AOJu0YxZ61NYojJfqWmQExgRCpuxQHr7pvuOc+T9rY7AjJprzWeKtxpn DNMW2QtGt+rZclPVEtdgh0lQy56K8zWr8wAZ69kVW/QZ3tM4tIs+V65TNVEBuJqJwtNMGf5MklH M4F5EL0bZRjkPJRuafo54wLA/92L0P00ZWlyL5vDsdGw0pUi9l67F+BFdcyAwOvDUfk9Iv4RBtQ xx8w== X-Gm-Gg: AfdE7cn5pokVCm/f2J5yOAHN/BtLd20YmyOTT0xinIICOjqmYYeWPAvRD/spm0cj181 aSUmZ9hPuQPIdrbRmvoW11D+ETxb//QY6wVmX/8691WAY8G2zMLzyzIJlubpGp6k2h7WeqHksf4 2/ljZtY+hNjPLcClawEjqgDoUFXxKYXl1WD2b9ygBv8LXj797EQyTSrD+qeGrPDborrWl6msJFZ vMn57OA0GUoAcYBEUY4lqfepmSWRsfUmuAoiu98/l9fv67HC2eMgGgeenXUjC5U9mH3jrD5ASCF Ps2rkYoAnOvYwPFBYmVZmwUCaUoOKG2504RPPgqkxLc8stPYjqBgbjea50ecHkYpAu/9s5I2iZu aV4OBRQ4pBkDA3DB2DD29+XeOX1m3CteItBAq5bNg+iT2QaBe/kGktaA6CpCdhFpmQ1M5wAtevW 32 X-Received: by 2002:a17:90a:d2d0:b0:36d:689a:cb27 with SMTP id 98e67ed59e1d1-38941cc7844mr6222196a91.24.1783587732735; Thu, 09 Jul 2026 02:02:12 -0700 (PDT) X-Received: by 2002:a17:90a:d2d0:b0:36d:689a:cb27 with SMTP id 98e67ed59e1d1-38941cc7844mr6222140a91.24.1783587732151; Thu, 09 Jul 2026 02:02:12 -0700 (PDT) Received: from [10.133.33.179] (tpe-colo-wan-fw-bordernet.qualcomm.com. [103.229.16.4]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-38a57dc53a0sm823440a91.9.2026.07.09.02.02.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 09 Jul 2026 02:02:10 -0700 (PDT) Message-ID: Date: Thu, 9 Jul 2026 17:02:04 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 1/5] dt-bindings: arm: coresight-tnoc: Drop arm,primecell to bind on platform bus To: Krzysztof Kozlowski Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Tingwei Zhang , Jingyi Wang , Abel Vesa , Suzuki K Poulose , Mike Leach , James Clark , Leo Yan , Yuanfang Zhang , Abel Vesa , Alexander Shishkin , 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 References: <20260707-fix-tracenoc-probe-issue-v5-0-bf733ed9ebd0@oss.qualcomm.com> <20260707-fix-tracenoc-probe-issue-v5-1-bf733ed9ebd0@oss.qualcomm.com> <20260709-versed-marvellous-pigeon-22e2ba@quoll> <02baada9-3f87-4e60-a469-44af5ebe1afe@kernel.org> Content-Language: en-US From: Jie Gan In-Reply-To: <02baada9-3f87-4e60-a469-44af5ebe1afe@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: X-uLK8COcSghc_O25upDb4bZP4_-Zar0 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA5MDA4NSBTYWx0ZWRfXybdsR64VPIGx 3AL3UmLirUry5WpzqrrxtCDsBLn8KmSammumZqbWRvwSCDwCns980+9Py8Iws/ilWbficMPFFvl 1K84QuoROm7MMVCLSW1aWl/066XRV9B8s3vzq7DBkDFB0nhGZKsDdNnB2xM/al7e2iiv2MLvfM4 vUqOPi5cJ1a60BZuCE2SNxpkuKV4kQ/950YeXJFuS7S6Zo6a7oXAxnN2WxjRn9mccQQ7oeyllj7 cyPF1ggTpOcCtga2vkyuaf8gfgliHv3KjnQ9SdiDbExnv2I3100vH/ps1LMgy0bP+Agr5l/BEnh JXJaLa57GtSn8m42dDbYw3UktEUtRJozRtFKrPJL/3xZYcOyIPNY5BuuPrgj/3GV1BMbQY9JpS9 F8Vcwmo9Z/zqKpBhNJmkg6sh3SmCDJ6NBz8rT2AcEG2rV/7wpc8mLTqIb2d34FP0fg6hqi0H0iH dbRGZ0uByGVSHXefx7Q== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA5MDA4NSBTYWx0ZWRfX/TiR0Oi7fwp5 KlyhetaUMcW2j6RlIlNSjZef1WMSzzdUX1JqARWyLVFk2J6xbS5Mrxpqy1qq4bDeX1QIalCwc7E 9YLFP//PRR9fs4iM5j8j+g8HGmy+nXA= X-Authority-Analysis: v=2.4 cv=PYPPQChd c=1 sm=1 tr=0 ts=6a4f6395 cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=Zyal9cr7WW2U8Oh0dT0A:9 a=QEXdDO2ut3YA:10 a=mQ_c8vxmzFEMiUWkPHU9:22 X-Proofpoint-GUID: X-uLK8COcSghc_O25upDb4bZP4_-Zar0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-09_01,2026-07-08_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 phishscore=0 lowpriorityscore=0 impostorscore=0 malwarescore=0 adultscore=0 clxscore=1015 bulkscore=0 spamscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607090085 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260709_020215_075270_4EFF83C9 X-CRM114-Status: GOOD ( 20.26 ) 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 7/9/2026 4:46 PM, Krzysztof Kozlowski wrote: > On 09/07/2026 10:34, Jie Gan wrote: >> >> >> On 7/9/2026 3:59 PM, Krzysztof Kozlowski wrote: >>> On Tue, Jul 07, 2026 at 05:08:49PM +0800, Jie Gan wrote: >>>> The TNOC compatible previously required the two-string AMBA form >>>> "qcom,coresight-tnoc", "arm,primecell", which forces the device onto the >>>> AMBA bus. >>>> >>>> Change the compatible to a single "qcom,coresight-tnoc" string with no >>>> "arm,primecell" entry, so the device is created on the platform bus and >>>> bound by the platform driver through its compatible string. >>> >>> I asked already: this is not a valid reason. References to Linux >>> structures are not correct here. If this is your reason, then answer is: >>> fix drivers, by renaming or doing whatever is necessary to platform bus >>> to behave like amba bus. >> >> The issue is that we are not allowed to introduce a DT property to >> bypass the AMBA bus validation, which reads the Component ID (CID) > > It is the first time "bypass the AMBU bus validation" appears in this > patch. You do not see that as a problem? > > Again, third time and the last: describe the actual hardware and the > actual problem coming from the hardware. Understood, will focus on describe the hardware and the hardware issue. Commit message description updated like below: The Aggregator TraceNoC hardware exposes CID registers, but the Component ID value read from those registers is 0 instead of a valid AMBA Component ID. As a result, the device cannot be identified by the AMBA bus and is not discovered as an AMBA device. Since the hardware does not provide a valid AMBA identification, describe the Aggregator TraceNoC using a dedicated compatible string and bind it to the existing platform driver. Thanks, Jie > > Best regards, > Krzysztof