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 A6E8A286887; Mon, 11 Aug 2025 23:27:41 +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=1754954861; cv=none; b=HmYfY6zqhg7h1Pmbm6O5qtFukkVEgF+SUunSnftVQuGBeU89UOkKziF6KdqlB4em2VX/+Jjte5h4+hqh//GvjUO0fh/RI51iegLUmUCh26Hh70awAC33t18g7bGbX3LGRBS4GtD2Hc8I7imC6C6DYQmQKp41T+jAZyB1NFe8EAk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754954861; c=relaxed/simple; bh=mwz/eP00rVG/Y6T80JxDHy1MjyKzEdAzpu/R1JJkgDM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=mVa6Zx+80CJdhwwFqLZO367+HHw65O+qD4yu8Hur+PaXd6ZSm7a0b7iyljL/1B3yx5trT2Belk3s6CTkaouLOZwWLSLg3TScgqYF3/9j6mhhz18olfG1F6WQnWjNNRCJreQAE8zpGLOm/oL1GLqt1M4Q4TKYOIMEWIJGJAYEB/g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=f6eUMg2a; 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="f6eUMg2a" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9F7E9C4CEED; Mon, 11 Aug 2025 23:27:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1754954861; bh=mwz/eP00rVG/Y6T80JxDHy1MjyKzEdAzpu/R1JJkgDM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f6eUMg2a7Y9Jqpexdl69AD7gsPUWf9vXj9KFy9y7r3utVFdjE/SaoO3RMNBv7tWA8 xTE9jAfJqU3pgyzwE6bnl+TB9xWr8NmOIFrQXJC+eURZ5LYPX40L3i0KFYGwhPJ7Y5 VBa6VGl0lLlEn8z4MnYdP+VGnrLqXICHDJBLOJZImia77h1yI21JHU1Oclg6p4lRDw W7iaVmArwUHaHFm/AmYqK5vKvNQrvteUdyj3OElW3yF7jyMXQ12g4zmRZXS9puStgq OHazLNtOT6XhIcQkswNWXjgbq1KgI0XxD7+hVacuj3wez6pr00W2purcTqTAkl+jBJ cwgighT5oIX+w== 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, Tingguo Cheng Subject: Re: (subset) [PATCH v1 1/1] arm64: dts: qcom: qcs615: Set LDO12A regulator to HPM to avoid boot hang Date: Mon, 11 Aug 2025 18:27:11 -0500 Message-ID: <175495482457.157244.16977167154606922012.b4-ty@kernel.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250716030601.1705364-1-ziyue.zhang@oss.qualcomm.com> References: <20250716030601.1705364-1-ziyue.zhang@oss.qualcomm.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 Wed, 16 Jul 2025 11:06:01 +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