From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 5893D1F8BBD for ; Mon, 23 Jun 2025 07:52:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750665127; cv=none; b=sT4iL8mwd59irKLjMvtrk0M6ZrC+k8NXxCujt0yyhFuyevuPiDUPVsMaLCLvSjibyZVJgz+qrz7fqzskdNz96DOFrXT263IdI7CLLQzNsdpMbo+ezdDLChBjaaex5/Rfx0kizGJDEAZjZwaMq4Ua40i79YdGEBuOJs7Z8582FL0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750665127; c=relaxed/simple; bh=uPzPLbno4uVQ6hlHmPSJ1p3r01sApeqRX2/GUkNLw54=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=b10qGfmQC+zvWYXrIU7edX4iH1hRwjFmuMTXHR49IBrzSrOUur11w4a/TRK8TiCzvzXzXPBcSXfIiQa/z7s5qVUqRWUzerjoonfUx2fj9buKbl15cL3kmt1ZEbW20j/I9kct0aTcac1qVZ/hOZjCraXkJrS2O34uz0HTug+VEBg= 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=RCFHL/ZI; arc=none smtp.client-ip=205.220.168.131 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="RCFHL/ZI" Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 55N0P2Yo014580 for ; Mon, 23 Jun 2025 07:52:05 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= R8KlMl6rNEnyTnB7QdDvjs+I2KkPy2RCoYHmWXPUL3k=; b=RCFHL/ZIallji1Sh eh6Z3rKDDIzs2m4/Vi9wn+3Ap7D1+uGkK7MD0EyZh4tvnIZf0wbgaOJU4k7hBAGQ kOcTeBaVdEIOc892GrEjFTBc8bor8BVAdXyQksL2YHgyvKg17AviTnWJuXEkO4uM MCTMbd3DusU6mzM0jBcs9mnoj5CTHRDV7r00q6iCNMMNq5C4MsknlfxGOjalkqYE 7rCHRXR7Vbm45G2LKoOMSD1YgLG2jqdXSo3y8tC9nK7CMeLO8gxIJ1hJiJcRPx2M B8Mr3SvjpoKYE6/tjuQsLtPkxoxPuJ+d+A2JJ0RhSdeiu793cvNw2Zc+mQNilr2d xvExsw== Received: from mail-pf1-f198.google.com (mail-pf1-f198.google.com [209.85.210.198]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 47evc5gx4r-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Mon, 23 Jun 2025 07:52:05 +0000 (GMT) Received: by mail-pf1-f198.google.com with SMTP id d2e1a72fcca58-74928291bc3so1179781b3a.0 for ; Mon, 23 Jun 2025 00:52:05 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1750665125; x=1751269925; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=R8KlMl6rNEnyTnB7QdDvjs+I2KkPy2RCoYHmWXPUL3k=; b=EYERtEEI6MVIJNSEkiaTqq6/6sBzxPoPVpMpKQNY89LjlVWOrUnJ96JHN6s+lG8l6D 4FyxGhCsAsT8VCLQTZiO+EbvwfTzv3y6qCLpq9vnfkiIwcP4F/sImo5AM04N0v3+6ox5 As3j6r0Tf1EyXSnoYKoRiiPSPW8WkeaHJtvQNjKAhEawtJW88ToFhtUsbytYnLOztTX+ uYAYqhG8QlxBSxJydAIylGVQLJecuWkgeRX6cD4xXDOg2vLGKEXIsE2+0OY1Rcz2VJbU qP1KCTLzUXGKykfi+XsqQiHl+rz1P4PAHvroo54ID27J8DvMA1DgR+YGM/zfNkbQe9Am SWEA== X-Gm-Message-State: AOJu0YwQ5XfPc/gdCx+ePPX3t3mbr021RCJDlfbowbNG3zmipjGNrrVQ bQbUJY/7QsbR6bh1gj7VtCegfFC0uuLTRIvWleuxqbIYAUaS7oxrg3C3JC8jkoZN2oPoe1jAu97 lCRmPWwFTNN+NOg5MPI9jKPYTd+moVhL7ysCIQ6OsejzKDem3YOA3bCNrUDdIBYw= X-Gm-Gg: ASbGnctskan5esy/A3m+G5rjlzK96C6s0rfuEFiVmj40YkuJZFT6sTMF7rgRMVDgi0i Txeab3WWy/9foHEc+2sf2bDA/Y3rhgqDcvtMQ+t5ht64bhGCxxPsWQQZaeJvquuXkm/Ulu3Eb/R OXRplfZcp+OFGbUqC1TExWXkPo258bu7bqnAP38YbO4QwXSyzgx8jRRNGdC9qpdY5HKUzECBFG9 BdEGaHx+CejVU4Ef7hirbeu9OCGFlEumLQd52kQe7V3f1I94Z0JSVpn2WlbziBjanEVqB/2tVSp fnXnq/3tQIw7daKNPnjB19bT550Z6NnAqPCqjCc3+FyhFraNf3LO X-Received: by 2002:a05:6a00:4650:b0:748:e149:fa89 with SMTP id d2e1a72fcca58-7490d5a6b8bmr20059532b3a.8.1750665124594; Mon, 23 Jun 2025 00:52:04 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHnefZLmLyw9BZQNOzK+M4PlREh/+03ub4fmgKHNxasTDiuFUjhGZCrR5KVOGMUWET11DC9SQ== X-Received: by 2002:a05:6a00:4650:b0:748:e149:fa89 with SMTP id d2e1a72fcca58-7490d5a6b8bmr20059468b3a.8.1750665124143; Mon, 23 Jun 2025 00:52:04 -0700 (PDT) Received: from [10.92.214.105] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7490a6275b1sm7797294b3a.79.2025.06.23.00.51.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Jun 2025 00:52:03 -0700 (PDT) Message-ID: <29bdba7e-63f6-4084-901d-beaab0e74894@oss.qualcomm.com> Date: Mon, 23 Jun 2025 13:21:57 +0530 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/2] dt-bindings: PCI: amd-mdb: Add reset-gpios property for PCIe RP PERST# handling To: Sai Krishna Musham , bhelgaas@google.com, lpieralisi@kernel.org, kw@linux.com, mani@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, cassel@kernel.org Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, michal.simek@amd.com, bharat.kumar.gogada@amd.com, thippeswamy.havalige@amd.com References: <20250618080931.2472366-1-sai.krishna.musham@amd.com> <20250618080931.2472366-2-sai.krishna.musham@amd.com> Content-Language: en-US From: Krishna Chaitanya Chundru In-Reply-To: <20250618080931.2472366-2-sai.krishna.musham@amd.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: QNPv-q4ROmkmGVtRozPvU59kmxl7xICe X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjIzMDA0NSBTYWx0ZWRfX/8A2YylpG/8j eb/zxpARKuhA+wuRsp8fxYGQcCO4yEkd00hm5XRdxn8wPH+tXPGWhsBkTXRM9KjPFEfogjiPfGh igVRHyQoQFYDXCTrKFrDRI76Ymv16pxlVX5CFQwA9DZ2kbdiOhYpIMH7jKh2LlZDq1keQLiEtGg ulBGXg6bmP2kCf855K7fZTvEB/MTBD+RsqshUegpYuX9zC/VIQtm4Q80z/QzaLI02HlGNkU3yRN WrQzi6ns7ImDuIaVhJfVTj/VY0fkyaMMp5j9iBqjw0+WvwqRbaaDN5zY9PZi0jFWwvO6B0I8+/S galaACcei+MT8h0jDRGo1zLEcyqjdiYnNtengZldFVSBEg0TubLQS07/HFrOoXgUzDt3+Z6MOU9 rEmuYn4nHZEm4QsQahcv0xhcqzq+hwBnDthzdWaM/QOk1XHETISn+/rpmEGk6C6PxKjIGzhQ X-Authority-Analysis: v=2.4 cv=caHSrmDM c=1 sm=1 tr=0 ts=685907a5 cx=c_pps a=m5Vt/hrsBiPMCU0y4gIsQw==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=6IFa9wvqVegA:10 a=zd2uoN0lAAAA:8 a=5_Q9n8kPR3DJOernC3cA:9 a=QEXdDO2ut3YA:10 a=IoOABgeZipijB_acs4fv:22 X-Proofpoint-ORIG-GUID: QNPv-q4ROmkmGVtRozPvU59kmxl7xICe X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-06-23_02,2025-06-20_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxlogscore=999 suspectscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 adultscore=0 mlxscore=0 spamscore=0 malwarescore=0 phishscore=0 clxscore=1015 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2506230045 On 6/18/2025 1:39 PM, Sai Krishna Musham wrote: > Add support for the `reset-gpios` property in the PCIe Root Port (RP) > child node to handle the PERST# signal via GPIO. Update the example > to reflect this addition. > > Signed-off-by: Sai Krishna Musham > --- > Changes in v3: > - Move reset-gpios to PCI bridge node. > > Changes in v2: > - Update commit message > --- > .../bindings/pci/amd,versal2-mdb-host.yaml | 26 +++++++++++++++++++ > 1 file changed, 26 insertions(+) > > diff --git a/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml b/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml > index 43dc2585c237..3ffe4512650d 100644 > --- a/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml > +++ b/Documentation/devicetree/bindings/pci/amd,versal2-mdb-host.yaml > @@ -71,6 +71,21 @@ properties: > - "#address-cells" > - "#interrupt-cells" > > +patternProperties: > + '^pcie@[0-2],0$': > + type: object > + $ref: /schemas/pci/pci-pci-bridge.yaml# > + > + properties: > + reg: > + maxItems: 1 > + > + reset-gpios: > + description: GPIO controlled connection to PERST# signal > + maxItems: 1 > + This is already part of pci-bus-common.yaml in dtschema no need to define it again here. - Krishna Chaitanya. > + unevaluatedProperties: false > + > required: > - reg > - reg-names > @@ -87,6 +102,7 @@ examples: > - | > #include > #include > + #include > > soc { > #address-cells = <2>; > @@ -112,6 +128,16 @@ examples: > #size-cells = <2>; > #interrupt-cells = <1>; > device_type = "pci"; > + > + pcie@0,0 { > + device_type = "pci"; > + reg = <0x0 0x0 0x0 0x0 0x0>; > + reset-gpios = <&tca6416_u37 7 GPIO_ACTIVE_LOW>; > + #address-cells = <3>; > + #size-cells = <2>; > + ranges; > + }; > + > pcie_intc_0: interrupt-controller { > #address-cells = <0>; > #interrupt-cells = <1>;