From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 C6D85365A03 for ; Mon, 2 Feb 2026 12:23:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770035009; cv=none; b=jxejnghaWvtC7EnsK6zf6QP17WNy06som290LQBSOjdCXuk0QCx9Ie6mOaKYtjPgmNM+W/U50+GlLIU0fLmZKoJDPYpMpwSBOUwxcNoOPLf1YS3SNqcpDxzLIvJ+SwB8Vo4o07dE5m1buho42Kz4LnNW7L1DO886E7fwQjy2Uf8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770035009; c=relaxed/simple; bh=+DKcwC7NTyCA/gl/ZDQxs8wO8JKKEH25qMtNu7FO14w=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=baUooY/nT6XuEGgd6TsF+tymkbErCJg4fAwnN2RJHABKyvSpPOnxtw38lBwrjT6TYsHzyGbMNHno7m9uinUcCRmUaBU2JQ6KNAhKwuwspB3m69+kENpL9VQ0vWuFFbrrMqwK5eWtAgQ//sVXHc5KGxbk6WQKmVXyf+uVC8w47NQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=bl+Cx+EW; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=OpFBcRrL; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="bl+Cx+EW"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="OpFBcRrL" Received: from pps.filterd (m0279868.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 6127DYPo523538 for ; Mon, 2 Feb 2026 12:23:26 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= r0UJBOOi/kAh4rFVu3QvP+gG227MJiiG8UbKLGyofKI=; b=bl+Cx+EW0tTwB0Ky TN4KbkMMUBLdNfUxhSlRcTV/+Qnxpb5LcZ7ozrdhUuKtDcrQGgN9n8srBhg12TcT fn9uYlhsCo/gFBiYKWPhF7cZsXwDfCs4IfYFeQmQwdf5tTxueIbNxSbcbx6iTY7I FZkhCTEcSnV6WW2mDfc2ZpCLSpCbj/4vtBjVrinhkO97W3Wp3c0k/2ict3YRU9D7 OyhQugSlwJr/xj6AZ/X+hMw3ZhFMCnMJLzvM1uFlyKiXEgu+TpoBTxtKB2yys+WZ 7tLpiezSHP11+v4i47PZcJynj6cHIKXXgl+hIEOIdZVpzrKWVoOwuqygeGWR46eP /AHkDA== Received: from mail-qk1-f198.google.com (mail-qk1-f198.google.com [209.85.222.198]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4c1awnwdmr-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Mon, 02 Feb 2026 12:23:26 +0000 (GMT) Received: by mail-qk1-f198.google.com with SMTP id af79cd13be357-8c53892a195so62866685a.3 for ; Mon, 02 Feb 2026 04:23:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1770035006; x=1770639806; darn=vger.kernel.org; h=content-transfer-encoding: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; bh=r0UJBOOi/kAh4rFVu3QvP+gG227MJiiG8UbKLGyofKI=; b=OpFBcRrLBm5XgX2PKzmVaLxWC2Fee1K9c1X6ppE7Enc66oqWBcoR99/mdJsyvCOYoe hcyfmhD0DJrlixJkY2+heh3cruoZ2/pSL7IpkRLM1BncE1xYQp58dZu0yEBvqix/wqyy DM9JFxEE5uYudT+M3dveLhCm/rUu7Ct/+dHwzmHFhJvqjLGmmX37kAIKnFGp33nWUoZF 2MA+ZfI1grZvwHh/2xpitAty5TIqlhQZpMxrvblAqUFNsMnDousKT3XWOQ26j92oeu4y EqxqN7df2a55XdnEYpRVu+uNzp4g1xhXd/fp+T9YHta/+6AfFKCOpFyQHA/My8UiSVFi 6MlQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770035006; x=1770639806; h=content-transfer-encoding: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; bh=r0UJBOOi/kAh4rFVu3QvP+gG227MJiiG8UbKLGyofKI=; b=n4lUhSOFQ9zostimhaTC3Mfhz4aFXRn308K6L31qEcyax/5fjt2cUU5qhdujLqOFy5 TPZy/+rIc1C0wOpYz4dusOmgIKsrkA1pFt3q5qBJD6aB8tR0qYKHSAw2DaUtKkR1KvZg j8UqlkG+yHK+v06hKEJdh6CBEFdLevERUp6ekdBoQWYe7pxmKL4XRSITnJM2LnZ+tJcu ctDyjxF/dwJ1psw3X9ALjF+FIxu62PSr1S9Yb1+ldiRuYGoVbXL2Kt776GhFSiRocMht L6k0E8rcVdTWzh0oomtnZY0afiOBrax+IRxcluDDIB488Hf9pUirjDwsqIoehUUQ6P4r kl2A== X-Forwarded-Encrypted: i=1; AJvYcCXlIBF6kyF6c+uDyu96+AP82yO69aO1hOhdXix7WX7oZCArFu48bKw0guDqOHq5Jx/b4rJ+qF+0APMqYVI=@vger.kernel.org X-Gm-Message-State: AOJu0YwxW6SG9UA3o8hWXjx7F7LJZ5gGiyqREXamonLpOwNKSZxVcycE DRxIov2mKqPS+BTXShWVRKIBL3gpd63EFrQtlaloVIaNF4Z3jKY7IiQmv0xVDcmPeIx1qN1jiVO s5mft8bdgyoSYNbnEM6z1iJpzdXxwGUhBbDdsOglfZ7d/QU9NGxrXJ8DjMYm04ZikD98= X-Gm-Gg: AZuq6aJnp5EfituzdoXwWDe7NxtHFZeJSVRUxwu3Y/xWCil/W9gSPEifbUiP7HKfFrk ATPe0ft6zJLm2rvFpchBdltmaGBGK1P3Kin7aBwmC24ah6K5qA52EZet3r4Xe9pPPpAKCcsDHeu vIu184qtR3DXpuDQua58P+FzXOnJifrLoMwUlxa/LBnFTlUiIKn8nmJE0TZVAR0fg1kjyhBLgSi o3eNYgC5vTLfRAl5XDAkQBbt0nrkObMRbnIfxi5ymoN5suXfcd+qNEkkHpQ8sFBh/vJ+ZKcJwlE 0+pva2NOSf8B8/gx0U+RsKkH3LdgjS9YWBFAIPD5MTHVgPgcrP2dfDpcbuAfBaw7bVJOIcrmK3q o6p5Ja3bwb5ZpF/SQ+yYWIKKRY0m09xIbj1qxzL7/dqSVJXlfO8HeD/0HLWzOYBG/yPI= X-Received: by 2002:a05:620a:45a6:b0:8b2:e346:de7b with SMTP id af79cd13be357-8c9eb229dc6mr1206557585a.1.1770035006071; Mon, 02 Feb 2026 04:23:26 -0800 (PST) X-Received: by 2002:a05:620a:45a6:b0:8b2:e346:de7b with SMTP id af79cd13be357-8c9eb229dc6mr1206554785a.1.1770035005433; Mon, 02 Feb 2026 04:23:25 -0800 (PST) Received: from [192.168.119.254] (078088045245.garwolin.vectranet.pl. [78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-658b4256a92sm7779349a12.5.2026.02.02.04.23.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 02 Feb 2026 04:23:23 -0800 (PST) Message-ID: <2a19de94-8a5a-4fd1-b15a-9b76ea5076d9@oss.qualcomm.com> Date: Mon, 2 Feb 2026 13:23:20 +0100 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 v6 2/5] arm64: dts: qcom: ipq5424: Add the IMEM node To: Kathiravan Thirumoorthy , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Wim Van Sebroeck , Guenter Roeck , Rajendra Nayak Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org References: <20260130-wdt_reset_reason-v6-0-417ab789cd97@oss.qualcomm.com> <20260130-wdt_reset_reason-v6-2-417ab789cd97@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260130-wdt_reset_reason-v6-2-417ab789cd97@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=MNltWcZl c=1 sm=1 tr=0 ts=6980973e cx=c_pps a=qKBjSQ1v91RyAK45QCPf5w==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=o4o9nyK-Q1O9M6IKefoA:9 a=QEXdDO2ut3YA:10 a=NFOGd7dJGGMPyQGDc5-O:22 X-Proofpoint-GUID: 62CfTKUALJ1236G2YpQzYTl9gWS6K4aH X-Proofpoint-ORIG-GUID: 62CfTKUALJ1236G2YpQzYTl9gWS6K4aH X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjAyMDA5NiBTYWx0ZWRfX4E78VWrb8LLM QiuiFbriV909dg5eSp6he066F/RKbLRWkzuQMp66RliajZO4XuS9NY14BFGMs0EYqfXnAF8R8wh 8TrINr6gatuhuthOysc3BzVspW+krwOQxxD8ITYeIRlUkByYDA43RJ7h3EMK9x+sF26rn948q7O B2Gkzk1bEBSex0OH0y0/PeXVcjrrJU+2dtkGouq3NwKDyTgjzrk1Gn5QH+XugNBHoJRiFPQqwtI nfLcnZwiYdxkTxThSrzG78uKuDQu5IQVh4HBZJ7E8MI8cAouzFdZWeUlooYM7Tz9wHOQS0w+2EE CoE9o+9AyY5aOdFatoAwFrMV5alvHddvmVR587axUBl8c7Xnn+bQ2si9XwmAS3J0a1rIJM7nMPK ND7KDW3ZO0HhGP/aVz76aa7ilQSPl2Dw3h5KwhKu27rbOa7BkPC1lEAcJmZHeHKW1xRo9lcHcEw EFZgWxshT+pOd8khMvg== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-02_04,2026-01-30_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 suspectscore=0 adultscore=0 impostorscore=0 malwarescore=0 bulkscore=0 priorityscore=1501 spamscore=0 lowpriorityscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602020096 On 1/30/26 11:44 AM, Kathiravan Thirumoorthy wrote: > Add the IMEM node to the device tree to extract debugging information > like system restart reason, which is populated via IMEM. Define the > IMEM region to enable this functionality. > > As described, overall IMEM region is 112KB but only initial 4KB is > accessible by all masters in the SoC. > > Signed-off-by: Kathiravan Thirumoorthy > --- > Changes in v6: > - move to mmio-sram and drop the Konrad's R-b tag > Changes in v5: > - No changes > Changes in v4: > - No changes > Changes in v3: > - Picked up the R-b tag > Changes in v2: > - Describe the entire IMEM region in the node > - Explicitly call out that initial 4K only accessible by all > masters in the commit message > --- > arch/arm64/boot/dts/qcom/ipq5424.dtsi | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/arch/arm64/boot/dts/qcom/ipq5424.dtsi b/arch/arm64/boot/dts/qcom/ipq5424.dtsi > index eb393f3fd728f0b2fc8cd93c849f8c170d76e312..90790f99f0597b63801d4e07b9b72cd372ad46d4 100644 > --- a/arch/arm64/boot/dts/qcom/ipq5424.dtsi > +++ b/arch/arm64/boot/dts/qcom/ipq5424.dtsi > @@ -697,6 +697,15 @@ ssphy_0: phy@7d000 { > status = "disabled"; > }; > > + sram@8600000 { > + compatible = "qcom,ipq5424-imem", "mmio-sram"; > + reg = <0 0x08600000 0 0x1c000>; > + ranges = <0 0 0x08600000 0x1c000>; > + > + #address-cells = <1>; > + #size-cells = <1>; I think you may need to add 'no-memory-wc' too, in case someone uses any of the sram functions on this in the future Konrad