From patchwork Mon Nov 27 12:13:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Chaitanya Chundru X-Patchwork-Id: 13469468 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="BkNrg9Ln" Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F007810F; Mon, 27 Nov 2023 04:14:34 -0800 (PST) Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3ARBLrkv022755; Mon, 27 Nov 2023 12:14:29 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : date : subject : mime-version : content-type : content-transfer-encoding : message-id : references : in-reply-to : to : cc; s=qcppdkim1; bh=GnHgs/oiZbsBfML8eUHTU9zqWhlGG3/cogQIaRxrnsQ=; b=BkNrg9Ln+OVm09eL4y1o9817oudkE3BEyXW10a8HzllPgOLfZXYm2MY5HKtDQc+QopfH 3dgF3HooxLTlHVc1SgZwzgEuFHKPjcf+HWJ8GXsQbKFkTsChao0q+wibSal4yinJCcOM tpunsvKBMexFIiOPOQpxMWJTEOLDaMEFtyAN8OFE+qJHqm8p/p2vCCiNyjXwcx5vfduG UB9Ph9eWCPoJYwV2FFADkMqv1XUtmUA21iNgzk1WrPNnovxlmJWqUkD6K/H+XZOWIOOE FpWOyYnHVWUABSXqs/T4adR0qwv1bLvjkPcy0G4nyiY2Ol/uog+qUfuo0xQudjIMGsi4 rg== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3umt63036g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 27 Nov 2023 12:14:28 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3ARCERp6014923 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 27 Nov 2023 12:14:27 GMT Received: from hu-krichai-hyd.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 27 Nov 2023 04:14:22 -0800 From: Krishna chaitanya chundru Date: Mon, 27 Nov 2023 17:43:49 +0530 Subject: [PATCH v3 1/3] dt-bindings: phy: qcom,qmp: Add PCIe qcom,refclk-always-on property Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20231127-refclk_always_on-v3-1-26d969fa8f1d@quicinc.com> References: <20231127-refclk_always_on-v3-0-26d969fa8f1d@quicinc.com> In-Reply-To: <20231127-refclk_always_on-v3-0-26d969fa8f1d@quicinc.com> To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Vinod Koul , Kishon Vijay Abraham I , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: , , , , , , , , , , "Krishna chaitanya chundru" X-Mailer: b4 0.13-dev-83828 X-Developer-Signature: v=1; a=ed25519-sha256; t=1701087256; l=1195; i=quic_krichai@quicinc.com; s=20230907; h=from:subject:message-id; bh=b3DOMQj6Bhju4h0J8NhBRIj6lknp3jleEt1YDn8qkHE=; b=vsA26FIK+JfF4MRQu9PTq7Xt79VhZ2FfN/C0746c2kFg5c2JrgVU1r1fUn9U4j4GnYEDYpVLI dnF5u5C6hewAZH9HhrZAMwWUbKVJesfKLSnXm0aCnZRm2BvK/c/OEhD X-Developer-Key: i=quic_krichai@quicinc.com; a=ed25519; pk=10CL2pdAKFyzyOHbfSWHCD0X0my7CXxj8gJScmn1FAg= X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: AUwF9-XudjQ4gTtbjP2KqU4U0ZhK30MU X-Proofpoint-ORIG-GUID: AUwF9-XudjQ4gTtbjP2KqU4U0ZhK30MU X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-27_09,2023-11-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 mlxlogscore=999 bulkscore=0 suspectscore=0 spamscore=0 lowpriorityscore=0 malwarescore=0 phishscore=0 clxscore=1015 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311270083 Document qcom,refclk-always-on property which is needed in some platforms to supply refclk even in PCIe low power states. Signed-off-by: Krishna chaitanya chundru --- .../devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml index 2c3d6553a7ba..c747c9f35795 100644 --- a/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml +++ b/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml @@ -93,6 +93,13 @@ properties: "#phy-cells": const: 0 + qcom,refclk-always-on: + type: boolean + description: In some platform where PCIe switch is connected, pcie switch due to some design + limitation fails to propage clkreq signal to the host and due to that host will not send + refclk, which results in linkdown in L1.2 or L1.1 exit initiated by EP. + This property if set keeps refclk always on even in Low power states. + required: - compatible - reg