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 CB9A12DAFBE for ; Fri, 30 Jan 2026 11:05:43 +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=1769771145; cv=none; b=s0lnatNeLeJu5MYxV24RsOSOBBrQ+wzAOS0Hik67MzDofbiGHn93b6RH+kB6/zkXHClVrOE4B9jJF1CeH/IL5+xMxZxXK0BcNj7rzNzN70pGEdcfIX/13KfqHe+Owyv8NcQpjt1GJcwUk74YW3OUSz7arMN+GtFS9HRvcZVcPB0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769771145; c=relaxed/simple; bh=K8VhzxAfr0A61EqhSA5WibM0ky6xXemKC6hC0md/jUU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=ESTgd2AgY3t6wdGy0oHJt0CfhOawufC+q2ltyljmnN50va9QANYKPB55EMHYSEQ+L9v8NTknilIjm85oxp1L6JWZxhYdqs8UACw3VqIY6/Y2gBK2NoErrNz6aq4M4dmJe/z3F7tvrh92nZhp36aTzOZD6yYoLSE3IY+hIdSz9ww= 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=fpiRUsVo; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=DMcDLjCf; 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="fpiRUsVo"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="DMcDLjCf" Received: from pps.filterd (m0279870.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 60U7GR442413758 for ; Fri, 30 Jan 2026 11:05:42 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= fGB/w1lyy+vSbSFq1bkZp/CB2/chuF0F33pAHHTG0Bg=; b=fpiRUsVon82NQgUr MDo0EColAK5PFcgU+mqzYOtMsxnOCd7TaT6WZ0pydtQBeXb4vuT12AwhUXfYcwX5 sUay6SMwiDVEB50cWw8+KnSnulWqQPouXQ8G2QB6GBe/PtUlCZc58WVCAOTFCiAq RYYV5RKN4yfxTwEq0jKgGyPw/XEEWWkEP6dZftDhZT6Il2buUK242tYiEJ34Ki1W p58viX8wW0Up9K68gAeDgMDwbTnAe9etIsPqH5CXKYPWuJjnX5jSRiXZOf/l92pJ UJZQblOpesqV8CWHZ4Vhdpb0qj0IDv34JGyFI3sYfLCJqBtQnZYm1hc0oeKKirrG ScFJrw== Received: from mail-qv1-f72.google.com (mail-qv1-f72.google.com [209.85.219.72]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4c0r41gp51-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Fri, 30 Jan 2026 11:05:42 +0000 (GMT) Received: by mail-qv1-f72.google.com with SMTP id 6a1803df08f44-8888ae5976aso2090296d6.2 for ; Fri, 30 Jan 2026 03:05:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1769771142; x=1770375942; 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=fGB/w1lyy+vSbSFq1bkZp/CB2/chuF0F33pAHHTG0Bg=; b=DMcDLjCfCxuhqbjv3YPNCdXqlTN8jK+xH8lWa37rRPeUWv9ccBUzJvVp6cGjUpGSFB m53DXcHycDiX0yUvpPI89Syn1fjXFEcKPMYzIY3Lsi4my1xpDbI5jmbcoCm6hr0zzwIW 1CTNm3DTSFpQeQGVJcee0mdA443mQqoYhWi1U2Vn9e7os1/BDZ501IdlpYy6GQcv0+5Y l+dbaeooUOKp/4Ae4mtmTkY/u+jgtIdMdqnaq9Xy4p3Ztgg9PVsLJrPNOWJbCxN82SMM nPewDjG2mSF8pkRXx40smSC2YJbhIYPObMpHZdJBFZdzp7gEZI1MuQfKwC+mgwlOitP1 jNXw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769771142; x=1770375942; 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=fGB/w1lyy+vSbSFq1bkZp/CB2/chuF0F33pAHHTG0Bg=; b=d+hLcTkT7fvgeilYZ/TlhhX7g/OIfv9o3F1bxpgoFIo3GZLsJLscZBbeC1kCk073qR Km4u6fYo+7DVMDMf9/+lxQlMOvEyDGTU1aG3x4yOJFZ6UQbsvCnr0TG1yro1y9AIAVb8 SqtxZZBzy9C+5y3uwj+umhkApW95KIHHJj3gWxONaR2eWIai3lt2a+wKiRg0sud2ISSN Yii7L8HYS1yceOXOut417bZuN05wUk9OsX10MsCvSY4qIw0yJ2LHYfPpIdY2412cdOVd pLL43/wkIm3NbEQ8Rvm2fABpfmdEh6Y/FGr/DSIwtxxoS/CWr8SpHwScvx9PgztVQt/a f6OQ== X-Forwarded-Encrypted: i=1; AJvYcCUMnLaaC56UIJC7kGOzIH/lnMG5OzaOSFtFm+iWTXG9fWpO15kN4X3eEtiIb4X9eVDmjYSW8/Syr+Ye@vger.kernel.org X-Gm-Message-State: AOJu0YyJjTI0CGtkv1PASAeKfVW4bGcJxjgDPP0lY12MyBXURJCQhEGl tZpvmHE5BjTkvW6PYHOEndDC9pl2gi1G21AP70CXPvFaJM3YYDyw9MFujjo+6Wa4RbxmW/BIx/y W140ZsMBcc/8Cs0bqIE3fxHJyqsHHdYb8fnpsbGHIeU8+HRf/bT5TQr6b5PhQlUe1 X-Gm-Gg: AZuq6aJnSzceGcEVqEi1yh9SJXQaYp9UGq4UajwuFi6dr0J0dv9XrgSgtnoJOoR5/Im PbCCoJlnq4xK7qjp3qy9qs/9BfZIgpNcA12WFexr+KhnVcIHS8woLHtsWYk5S33Nl8jUY0ZxMVJ Ydu1dxZjyH0FXLI4y4xdOCzlFBRQ0ZnMJYP2of1n0ApqxFBZ7ybPt0TIifLon0pR4GXwcm+XqNe tpAOYVNSlfMK2VbmYNqBECOkywS75kGsDFfr7i9qdaE5MammwOHeA5PLaUmI1q8kI9cOKdIPnBV atkngDSQEqDavjpO8Xdh2GP959lobempWEKkRq6KlG99cjSLvD/sobG+y1onAgz9gj5m1nnC/F9 CoBe9lTkmymfT50Iu/XjoRZA+LPdaEdt5tHKTlthUBRw4o4+rXdoqTs8f3YSLlCWvxCQ= X-Received: by 2002:ae9:e710:0:b0:8c9:eb7f:b6d with SMTP id af79cd13be357-8c9eb7f16d1mr195902385a.4.1769771142160; Fri, 30 Jan 2026 03:05:42 -0800 (PST) X-Received: by 2002:ae9:e710:0:b0:8c9:eb7f:b6d with SMTP id af79cd13be357-8c9eb7f16d1mr195899985a.4.1769771141715; Fri, 30 Jan 2026 03:05:41 -0800 (PST) Received: from [192.168.119.254] (078088045245.garwolin.vectranet.pl. [78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8dbef87254sm397985666b.12.2026.01.30.03.05.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 30 Jan 2026 03:05:40 -0800 (PST) Message-ID: Date: Fri, 30 Jan 2026 12:05:38 +0100 Precedence: bulk X-Mailing-List: devicetree@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: regulator: qcom,rpmh: Allow regulator-off-on-delay-us To: Mark Brown , Rob Herring , Jishnu Prakash , Kamal Wadhwa Cc: Saikiran , lgirdwood@gmail.com, andersson@kernel.org, konradybcio@kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, krzk+dt@kernel.org, devicetree@vger.kernel.org References: <20260127190211.14312-1-bjsaikiran@gmail.com> <20260127190211.14312-2-bjsaikiran@gmail.com> <20260129174829.GA1324020-robh@kernel.org> <355213ef-106c-4383-88e7-9b40f5b1c1ef@sirena.org.uk> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <355213ef-106c-4383-88e7-9b40f5b1c1ef@sirena.org.uk> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: xWytOmo1FHqZMebNn4trhp3277IKt8bj X-Authority-Analysis: v=2.4 cv=W541lBWk c=1 sm=1 tr=0 ts=697c9086 cx=c_pps a=7E5Bxpl4vBhpaufnMqZlrw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=GEzcQQvqF8elpVRPfI0A:9 a=QEXdDO2ut3YA:10 a=pJ04lnu7RYOZP9TFuWaZ:22 X-Proofpoint-ORIG-GUID: xWytOmo1FHqZMebNn4trhp3277IKt8bj X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTMwMDA4OSBTYWx0ZWRfXyJwuLg2ZSBTS YLhvYSwLtOCYarkC9w87wRholjSxVhDViLhrvDu8bXcVvlD8hsI9t6+sCYvFnuoF6XpUStexvK+ ThBwJrRylddCeiaBMDxhSVMFTqlwMLIY8sRsh5Ny9QMtl/JF4eC+/et7+dnFhZhNxaVOxOMjfdO WcxvtbKgXEepmZqwUZxF8mITbru+AobU2tj2ZtsGiuf9WBJjvrs3e4H04jLwxW6iKq4yIrufQRP fDi97ikKrlhVqeKYWBJWrXbvyTNgFZKaXeQUQS4tvCFWMzRf4KzYGo+3bCB7O8OB8SFgghQ/zdg DsUjduYMM5X9gqIv1TWiITznqHGvsV7NHkTcCYTZNU+L/Uyg0YvkyaEYwICFj5Bd6/sVTw4DtQt I9AU1lePGKDl7GE85vgRQXydibZxjpQKcML6DOHeeZRN7oIB/fkmykKqaMBBUJsB4mr9DL06E2A me+s/QkGZsNx7N1gKFA== 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=2026-01-30_01,2026-01-29_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 spamscore=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 adultscore=0 clxscore=1015 impostorscore=0 phishscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2601300089 On 1/29/26 7:15 PM, Mark Brown wrote: > On Thu, Jan 29, 2026 at 11:49:42AM -0600, Rob Herring wrote: >> On Wed, Jan 28, 2026 at 12:32:10AM +0530, Saikiran wrote: > >>> This property is required for platforms where specific rails (like camera >>> LDOs) rely on passive discharge and need a mandatory off-time constraint >>> enforced by the regulator core. > >> Does enforcing some off time on all your regulators cause some negative >> impact on the ones that don't need it? If turning them back on is >> performance critical maybe don't turn them off in the first place. > > You might see something like unexpectedly long delays resuming a runtime > suspended device. Generally I'd say that if the delays needed for > something like this are long enough for anyone to notice they're long > enough to be disruptive. > > Having said that I believe an active discharge feature in the hardware > has been identified and is being investigated, that's generally a vastly > better solution all round so hopefully this change isn't needed at all. +Jishnu, Kamal Could you please confirm whether our hw can do that? Konrad