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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-bd4f4c2a68dsm701110166b.18.2026.05.19.03.58.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 19 May 2026 03:58:09 -0700 (PDT) Message-ID: <91832aec-22f0-4244-9989-39bbd8defb24@oss.qualcomm.com> Date: Tue, 19 May 2026 12:58:06 +0200 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/2] qcom_battmgr: Add batteryless DC-adapter MAINS support To: Rakesh Kota Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sebastian Reichel , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, jishnu.prakash@oss.qualcomm.com, kamal.wadhwa@oss.qualcomm.com References: <20260518-add_dc_in_support-v1-0-31fbaa329879@oss.qualcomm.com> <56a54a34-1040-44ae-92e2-ce65a3d3acb5@oss.qualcomm.com> <20260519065938.4i5wot72pfxy4m3d@hu-kotarake-hyd.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260519065938.4i5wot72pfxy4m3d@hu-kotarake-hyd.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE5MDEwOCBTYWx0ZWRfX1Zhz6UdDQIW6 WYJVIyO/LRfzAadrgohzduQRKs2wLYFjb0Pp2X61n8WjuZA27/9CUrq+jSoxXb4TdEK5/8z3T4l HtgcB7+dQgGBLGdS8RcaernVdtqkzswecPTnZFUY4A2/AqoQta4tqPqIIZU5ezEFT8l3jzaGynl 3MzF9NPm30pp/8ODUJjRSjb9v96s1Zk2Z1yYWsjn6DDBmtW1fo3R744yhWmi3cmG9T5d6XPsxTB lfeg8tuxQXJC3UEz59uz47WY+Oy7N5DBChZQfBWvLDawyh2pqyatBUC7WJmAFF8lflJYShkDCUJ EsvvWwqygyOhaWb8Dy/Gk7ov239eZJ51t29/lhDeJ2cFslX7y78MBUycIIKXlaTN8kV634wQ7xN sDBkkOnZoMVHot1KbMoL1QRdGs5xI+PpTFAWS2lbXijEVObgq1RnNTF3AdH/LUasYleTiEC36dA CNdwF6TD/jC4K/TzgIQ== X-Authority-Analysis: v=2.4 cv=NrjhtcdJ c=1 sm=1 tr=0 ts=6a0c4243 cx=c_pps a=JbAStetqSzwMeJznSMzCyw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=WGUvbcDy2-o6vtexG74A:9 a=QEXdDO2ut3YA:10 a=uxP6HrT_eTzRwkO_Te1X:22 X-Proofpoint-GUID: 2Qe3uvZ5DY1_R8JnKK2Gw3DPOwEDbAlh X-Proofpoint-ORIG-GUID: 2Qe3uvZ5DY1_R8JnKK2Gw3DPOwEDbAlh 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=2026-05-19_03,2026-05-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 priorityscore=1501 phishscore=0 clxscore=1015 impostorscore=0 adultscore=0 spamscore=0 malwarescore=0 lowpriorityscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605190108 On 5/19/26 8:59 AM, Rakesh Kota wrote: > On Mon, May 18, 2026 at 04:36:32PM +0200, Konrad Dybcio wrote: >> On 5/18/26 3:49 PM, Rakesh Kota wrote: >>> On batteryless boards powered by 12V DC adapters, registering the >>> power supply as BATTERY causes userspace to incorrectly trigger >>> battery power-saving sequences. >> >> Does battman really offer no way of differentiating whether a battery >> is *actually* present in such cases? >> >> What boards are affected? >> > Currently, batteryless support is only implemented for the > qcs6490-rb3gen2(Kodiak) board. Does the firmware report anything obvious that would point to this not being a battery, e.g. design_capacity = 0? Konrad