From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 8BD7E28467D; Mon, 11 Aug 2025 23:27:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754954857; cv=none; b=Xu1M7BkT4zQuUFot9DF1NilB9YxuMoLN4q/r0p4CL+D9++42+q5fnOKBZn7ZwIdLMzMIc7NBl2qftXDwZ/669rcMsVVCggwYZINmSd2S3fyY2z57P2vF0uWdPWyvlt8ofYvfqwCmotODcR4MAd4Hv1MPk/8wfKez9LRyzWSmKi4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754954857; c=relaxed/simple; bh=aww67BHxnNdQbNNndw5WrR6+OqPaKbI8LFTYgFplNIo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=UHGwTnHOxa5q7jZLDGSl3gVZFVPswgJZWej3m4/3yyTMEAkWWss5OPy9xGakOOBUdbXfcs2PNm83kxqe2cD6lmkXtIn7R/sKU7r5gBqOBn2rYH1vJJlBAGcdy/XIaW5cHxDHh/MEJO5D9YPkGR6/OZ+eedXY77sg4eYrPc0QqtU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Nq15aqHZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Nq15aqHZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CAA06C4CEF7; Mon, 11 Aug 2025 23:27:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1754954857; bh=aww67BHxnNdQbNNndw5WrR6+OqPaKbI8LFTYgFplNIo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Nq15aqHZLa13/+Zl7U5iFb3kjfwe8gRadmatAPa5boXFPwIeYedJR2gUen8PWN/QO VXHGC47m7jXL5oBwzNEgZmuNFFQiKnJcXn0XgmXHLIOCthu63tlIadNvqSqYUA29fo 1sFhaESlvi7m32tZvPYxbWgEMBE0zTlu8RNL6X/BGcJf8C0SbG2dV/8GO1oX6SYSSL m9GyQeOojnNewvbsm1S1qL4UhiDDAE6qE+rzp6qugCRBRhwZXgwayjpx/JDajElMUI yhxevl053Q6AtlXtEpfciHVU1Wwiv6724T43naPWPSMpV8ZgU1D9ELkYOOVnHxyXf7 ffsCkMinDH5YQ== From: Bjorn Andersson To: konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, jingoohan1@gmail.com, mani@kernel.org, lpieralisi@kernel.org, kwilczynski@kernel.org, bhelgaas@google.com, johan+linaro@kernel.org, vkoul@kernel.org, kishon@kernel.org, neil.armstrong@linaro.org, abel.vesa@linaro.org, Ziyue Zhang Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-phy@lists.infradead.org, qiang.yu@oss.qualcomm.com, quic_krichai@quicinc.com, quic_vbadigan@quicinc.com, Ziyue Zhang , Tingguo Cheng Subject: Re: (subset) [PATCH v2 1/1] arm64: dts: qcom: qcs615: Set LDO12A regulator to HPM to avoid boot hang Date: Mon, 11 Aug 2025 18:27:08 -0500 Message-ID: <175495482442.157244.678684703517788074.b4-ty@kernel.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250717072746.987298-1-quic_ziyuzhan@quicinc.com> References: <20250717072746.987298-1-quic_ziyuzhan@quicinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit On Thu, 17 Jul 2025 15:27:46 +0800, Ziyue Zhang wrote: > On certain platforms (e.g., QCS615), consumers of LDO12A—such as PCIe, > UFS, and eMMC—may draw more than 10mA of current during boot. This can > exceed the regulator's limit in Low Power Mode (LPM), triggering current > limit protection and causing the system to hang. > > To address this, there are two possible approaches: > a) Set the regulator's initial mode to High Performance Mode (HPM) in > the device tree. > b) Keep the default LPM setting and have each consumer driver explicitly > set its current load. > > [...] Applied, thanks! [1/1] arm64: dts: qcom: qcs615: Set LDO12A regulator to HPM to avoid boot hang commit: fba47ba8c8a8ffa9d8ad1836396837a998bb5153 Best regards, -- Bjorn Andersson