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Fri, 17 Apr 2026 11:08:26 -0700 (PDT) X-Received: by 2002:a17:90b:4b49:b0:35d:9560:3f09 with SMTP id 98e67ed59e1d1-361404b8efbmr3987033a91.24.1776449305385; Fri, 17 Apr 2026 11:08:25 -0700 (PDT) Received: from [192.168.2.3] ([49.204.17.60]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b5fa9ff3bfsm33496785ad.7.2026.04.17.11.08.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 17 Apr 2026 11:08:25 -0700 (PDT) Message-ID: <680211d2-9277-4a44-b403-a2c17e531d3a@oss.qualcomm.com> Date: Fri, 17 Apr 2026 23:38:19 +0530 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 2/4] hwmon: Add Qualcomm PMIC BCL hardware monitor driver To: Daniel Lezcano , Guenter Roeck Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , amit.kucheria@oss.qualcomm.com, Daniel Lezcano , Gaurav Kohli , linux-hwmon@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260206-qcom-bcl-hwmon-v1-0-7b426f0b77a1@oss.qualcomm.com> <20260206-qcom-bcl-hwmon-v1-2-7b426f0b77a1@oss.qualcomm.com> <6f4b27c5-074e-403a-90b8-fe7ef3a993b5@oss.qualcomm.com> Content-Language: en-US From: Manaf Meethalavalappu Pallikunhi In-Reply-To: <6f4b27c5-074e-403a-90b8-fe7ef3a993b5@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: _59ns3q5zjkc-pKBh5klv1KCfBaFYBlz X-Authority-Analysis: v=2.4 cv=YpQ/gYYX c=1 sm=1 tr=0 ts=69e2771a cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=AEHGBJ4MxtK84nyFdbYi0g==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=bmlHNXG4B5j1TUniDnQA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDE3MDE4MiBTYWx0ZWRfX1OjTkx51Q658 Tj1h/LylaAiU02X1tLFxuukN8bI/eXnaS4A2ycCEMZxkmWbjCVCaOG1c9sdXZI8/4kVseRIANX0 F9DUmWA1eEZln0QqS4J1WV1XojH0kruB8AJAmuoBZ7RMKwsqIGyGSsJnbeQMBsKlRVcI5vU5jDk yHjVIhiX59RYqYddNyCgOaM9CctQfYCFPv7y2e4JQ9YUD4YjKOC0PQy3wPnXoGVKOlQdtwpV8oV JAvM6X9MNXLmXjnPJo+IhdV4L3Bl2mvf7J2QN+7/ZvnKzAFpPMWLwUhKo9KSgX53GUKHbqG6nsD WI0ARp/3vlJ0abm6JznoQ0a7rmePfXhiy9bxd6LwEHSI5BZv+msHgP+vFOBVpUblxbVdZ9FT799 4gDBN31AP1cuSpFy3W6x81HkZ3fS4Uq/quKZrmJcbEKDG/N9bmS9zSITlNeJuUfvPNqNZb5PLd2 QRMzvQL0spOMPOWWSMw== X-Proofpoint-ORIG-GUID: _59ns3q5zjkc-pKBh5klv1KCfBaFYBlz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-17_01,2026-04-17_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 adultscore=0 malwarescore=0 lowpriorityscore=0 phishscore=0 spamscore=0 suspectscore=0 clxscore=1011 impostorscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604170182 Hi Daniel/Guenter, On 3/20/2026 9:38 PM, Daniel Lezcano wrote: > > Hi Guenter, > > On 3/20/26 16:22, Guenter Roeck wrote: >> On 3/20/26 07:52, Daniel Lezcano wrote: > > [ ... ] > >>>> + >>>> +ADD_BCL_HWMON_ALARM_MAPS(in, min, lcrit); >>>> +ADD_BCL_HWMON_ALARM_MAPS(curr, max, crit); >>>> + >>>> +/* Interrupt names for each alarm level */ >>>> +static const char * const bcl_int_names[ALARM_MAX] = { >>>> +    [LVL0] = "bcl-max-min", >>>> +    [LVL1] = "bcl-critical", >>>> +}; >>> >>> IIUC there are three levels of alarms but the hwmon only has max/min >>> and critical. Would it make sense to do adaptative min / max ? So when >> >> hwmon has lcrit, min, max, and crit alarms for all sensor types, plus >> an additional _cap_alarm for power attributes and _emergency_alarm >> for temperature attributes. There is also a generic _alarm attribute >> for each sensor, which is supposed to be used if the specific alarm >> type is not known. >> >> What exactly are the three levels of alarms ? > > Manaf can give more clarifications, but it is like we have yellow, > orange and red alarms. So there is an additional alarm comparing to what > is available in hwmon. The proposed driver maps orange and red alarms, > respectively to bcl-max and bcl-critical. Yes, it is different limit level alarms (3 low voltage and 3 over current) like yellow, orange and Red. Currently I mapped, yellow and orange. Red is not enabled. Thanks, Manaf > > I'm just asking if it is important to have this 'yellow' alarm ? And as > there is a missing alarm to describe it in hwmon, how can we use it ?