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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b76f519d828sm1198664666b.18.2025.12.01.03.42.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 01 Dec 2025 03:42:34 -0800 (PST) Message-ID: <863db415-51e0-4c54-85bf-ac6a168758e0@oss.qualcomm.com> Date: Mon, 1 Dec 2025 12:42:32 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 09/12] arm64: dts: qcom: sdm845-lg-common: Add camera flash To: Paul Sajna , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , David Heidelberg Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org, Amir Dahan , Christopher Brown References: <20251125-judyln-dts-v4-0-a5a60500b267@postmarketos.org> <20251125-judyln-dts-v4-9-a5a60500b267@postmarketos.org> <62ce91326c0e1d5aef1ad5ecad9b99695f983347@postmarketos.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <62ce91326c0e1d5aef1ad5ecad9b99695f983347@postmarketos.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=J/KnLQnS c=1 sm=1 tr=0 ts=692d7f2c cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VVznJNgsxCGEoLoMiiIA:9 a=QEXdDO2ut3YA:10 a=uxP6HrT_eTzRwkO_Te1X:22 X-Proofpoint-GUID: ijYgi6EYnMcubQBEkxhgKMHn5vaYaE04 X-Proofpoint-ORIG-GUID: ijYgi6EYnMcubQBEkxhgKMHn5vaYaE04 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjAxMDA5NSBTYWx0ZWRfX57JckIyX4V9k 2gJTQhq/o3m6zYJrodtyxinKQxTboBRtXZbFe2EIu/ZnKQOfk4SpjxCOc6r6m53UmfRk1HK2lHt IbnEdDbxw3g5j0wM7TjqQ06g553MCw7AsKSV6wOw5RGUPj8kXJoDumGwqfn/704wjFpcYc09eu4 h1I54kadHA2/L3nsYUUtLKILgBJQXr01DnCGyMLowVmRM6mNSVBXbqAj+vdS85AK7SaKLdGoGRs 6lom8Q5UTsr2I9Ty23tdP/svGH7qJZOr5gA9kyBIOdHSBo8KGITNbLOxrCec64tdQjKwFKCQD5b 9rb9puFiINeXnozh1uGRbUf/XK6ebyxT7psNk4OMgE64wISxZev+iuQPb6Q32o8btD9v6ngPV+y b/DjjOIeDOJInJ3R7Dlqph+6/j67GA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-28_08,2025-11-27_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 malwarescore=0 priorityscore=1501 lowpriorityscore=0 adultscore=0 phishscore=0 clxscore=1015 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2512010095 On 11/28/25 9:20 PM, Paul Sajna wrote: > I did more testing on this, and the led only comes on if it's brightness is set to approx 150/255 or lower. In that case, should I set led-max-microamp to 60mA? FWIW your downstream kernel sets up channels 0 and 1, here you only enabled 1. Taking a look at a picture of the phone, I only see a single LED on the back, so perhaps you're (over)driving a single power line? I'm not a milion percent sure, but I would assume the current draw *limiting* register applies to the sum of the current going through the three channels because there's only a single instance of it. Konrad