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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B7BD8C3DA7D for ; Thu, 5 Jan 2023 04:11:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230446AbjAEELk (ORCPT ); Wed, 4 Jan 2023 23:11:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35636 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229818AbjAEEKP (ORCPT ); Wed, 4 Jan 2023 23:10:15 -0500 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F9FB2C0; Wed, 4 Jan 2023 20:10:11 -0800 (PST) Received: from pps.filterd (m0279868.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 30520KUj020128; Thu, 5 Jan 2023 04:10:01 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=message-id : date : mime-version : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding; s=qcppdkim1; bh=17ogLiYv+qSzQPmh13dokklfW+MYYfLxJDhpxao04Qw=; b=NSiv0fhBRk3wxy0c44DXw6o+1Fhak+bfKzFEsW2OCvLP7LOCV8qdz74nWP/T/pZLE3gc jSIr7FjWW5/D7Byt+tQ28l9hsYx9G8v3iwPPiEUrVXzpyYV8qrZOP1vNR9bLzVFp1w1j 4w4dT7KD1pILqduRzfgkVx8RJA70CpcERC0UDFgDt3XfmrlkgN/2HQth8ik3Ht9d7n2O n9fyHcp/bspcU9ywpfHTruLOWtyloWnm9+JYqo9MXaCIsmoeL1Gd/m1tbwhFeNph6hUo l7UAv6TthTjhVqlBjwRMqPG4wWj6RKAsdhl98AF9rQlvZl/MqPY+sy0+idM19VySHLGg kw== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3mwj4hggex-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 05 Jan 2023 04:10:01 +0000 Received: from nasanex01a.na.qualcomm.com (corens_vlan604_snip.qualcomm.com [10.53.140.1]) by NASANPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3054A0YN025032 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 5 Jan 2023 04:10:00 GMT Received: from [10.226.59.182] (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Wed, 4 Jan 2023 20:09:59 -0800 Message-ID: <613e5b54-2e32-640e-a584-df592907c346@quicinc.com> Date: Wed, 4 Jan 2023 21:09:58 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.6.0 Subject: Re: [PATCH 1/6] bus: mhi: ep: Power up/down MHI stack during MHI RESET Content-Language: en-US To: Manivannan Sadhasivam , CC: , References: <20221228161704.255268-1-manivannan.sadhasivam@linaro.org> <20221228161704.255268-2-manivannan.sadhasivam@linaro.org> From: Jeffrey Hugo In-Reply-To: <20221228161704.255268-2-manivannan.sadhasivam@linaro.org> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: Msi6NBn_lAWaM8jWLsZuB6iC-ENyILR9 X-Proofpoint-ORIG-GUID: Msi6NBn_lAWaM8jWLsZuB6iC-ENyILR9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2023-01-04_07,2023-01-04_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 malwarescore=0 spamscore=0 bulkscore=0 impostorscore=0 suspectscore=0 mlxlogscore=882 clxscore=1011 adultscore=0 phishscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301050032 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/28/2022 9:16 AM, Manivannan Sadhasivam wrote: > During graceful shutdown scenario, host will issue MHI RESET to the > endpoint device before initiating shutdown. In that case, it makes sense > to completely power down the MHI stack as sooner or later the access to > MMIO registers will be prohibited. Also, the stack needs to be powered > up in the case of SYS_ERR to recover the device. > > Signed-off-by: Manivannan Sadhasivam Reviewed-by: Jeffrey Hugo