From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 497253F8893; Thu, 9 Jul 2026 09:18:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783588688; cv=none; b=lVd4YKZIpNgpRe/YkH3EypMbVEnottn9n3u314YHXXijxraCNM0GjxjS0v70dgg7VkyeaqO+pUiM8rDlD+cd1ZasM8Hso+ZE85v0u4/0MITRatFZ5FC1CNmkY0/bOsJ2heA90CdVb/LMWfihex989n11rRZy4LCAPzonzahdDXw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783588688; c=relaxed/simple; bh=N/gh54s4OihDfld7F9b4Mg6B69v+qijNBUDuZONwALI=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Mlqo8CDrslmKaQURV57zBsSp3mrqPNCf8i1FdDTQNiubVlaNTPD7JUPAw0KS/NA0u7tjmNePPWDA7u644cO7umjmKTVKF4dnQsCsnb+7F0J7KbZCVlb7sJ+Ze66G+VAtZOmf8Q/ChWOoFNZTjldJWSpx3/6h18XuqRGrxvU8s84= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YEef0RU5; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YEef0RU5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1F941F000E9; Thu, 9 Jul 2026 09:17:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783588687; bh=BEMcw8GAKz3jSF3iw3VgzW8YSfsS57654If934RMsrc=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=YEef0RU5toiTWSQj+MtfBMxBIdpCg/Z74PvTPGyppad+87PHS31w6ZiUyJu16lDf2 Ju/Vz2ah7RuFmP/GmKPoYZn5sOIG7izXpe8ctGxOa8fxtZSU3tS8U0Zr24fY8elcMG +ar0R0N+IXhM2ntjzlP3rcEsgmfoNKisWMAPrime76mCqFJnwl5Fr8ZjcqokRSSXFn HEtHcmKWZKKvH4KK0kxPZzYrs/srbIjrFbUkRkfWXkIB5qTJmGNn+NJHayOTCvYyGQ i1UOs8TpKv4HuBM/zjRUk1aO/61AGEz9pDfOJbu7Zn3G7WtkwTAA00pkNlW9dLnvm4 bmX1p/Q/bC9xw== Message-ID: <458850b0-bf36-4784-9130-50dcfb30ee75@kernel.org> Date: Thu, 9 Jul 2026 11:17:56 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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: 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 , 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> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 09/07/2026 11:02, Jie Gan wrote: >>> 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. > yes, that's good. Best regards, Krzysztof