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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b8fc735e579sm667828666b.9.2026.02.20.02.00.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 20 Feb 2026 02:00:46 -0800 (PST) Message-ID: <85ce1f2c-f5cf-4e97-9611-4aed03f69cd7@oss.qualcomm.com> Date: Fri, 20 Feb 2026 11:00:41 +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 v2 5/5] arm64: dts: qcom: sm7225-fairphone-fp4: Add battery temperature node To: Luca Weiss , Jonathan Cameron , David Lechner , =?UTF-8?Q?Nuno_S=C3=A1?= , Andy Shevchenko , "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Laxman Dewangan , Bjorn Andersson , Konrad Dybcio , Hans de Goede , Jens Reidel , Casey Connolly Cc: ~postmarketos/upstreaming@lists.sr.ht, phone-devel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org References: <20260220-bat-temp-adc-v2-0-fe34ed4ea851@fairphone.com> <20260220-bat-temp-adc-v2-5-fe34ed4ea851@fairphone.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260220-bat-temp-adc-v2-5-fe34ed4ea851@fairphone.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: qhHSdbG4cJJF2906Sf_n9FjZKi2bLw02 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjIwMDA4NiBTYWx0ZWRfXz9koiJYWc9gf tX37EAr4dVhCxq6BZ5QcXIA5N4HuKuvMail7VJq3VvjE4uV3zbJuWCQHM30+kCklkQ7nJ+zaxMo hufipoHUsgV3U85W7QN7RGcvDSRWiYsDFWphk89Zyjx05bgSUXvKidmlm9uDegR+iW3uEgI1DU8 mJb10fZOfRkyHB7pJPZk/yAlwUhv7drt1hPnqsSSvrIzXOhVz7d5z5YS6KBMq4o2OFR6V1BvBX4 lFAEcA6rRS1moNlLFezEUsJPDx5iQLBbOjPeRPaYklVLbSZTIYYo295iPj2uFFPlH8kHlSkLPcX 1NMQk56pjznRJ12Wpv9LoTQLjabGcFLyso08CdyzApAIg28b5WEwlAUtEnIb3KNwwhcy0bHJ8Xg 3Q4MhuL901DUHWKNIc50xJsCJppCmbd1Jd30hNc3CO2NT+5YL2Odws7LNTFy05nPVx3EPXOOldB fOcvPNyG1bdMajIOXyg== X-Proofpoint-ORIG-GUID: qhHSdbG4cJJF2906Sf_n9FjZKi2bLw02 X-Authority-Analysis: v=2.4 cv=KYzfcAYD c=1 sm=1 tr=0 ts=699830d2 cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=6H0WHjuAAAAA:8 a=8l1bqfnc6EbWCU14WoQA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 a=Soq9LBFxuPC4vsCAQt-j:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-20_01,2026-02-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 impostorscore=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 suspectscore=0 malwarescore=0 priorityscore=1501 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602200086 On 2/20/26 10:19 AM, Luca Weiss wrote: > Add a generic-adc-thermal node to convert the voltage read by the > battery temperature ADC into degree Celsius using the provided lookup > table. > > This will later be used as input for the fuel gauge node (QGauge on the > PM7250B). > > Signed-off-by: Luca Weiss > --- > arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts | 83 +++++++++++++++++++++++ > 1 file changed, 83 insertions(+) > > diff --git a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts > index b697051a0aaa..7857003099a6 100644 > --- a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts > +++ b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts > @@ -108,6 +108,89 @@ rear_cam_sensor: thermal-sensor-rear-cam { > io-channel-names = "sensor-channel"; > }; > > + bat_therm_sensor: thermal-sensor-bat-therm { nit: this should be a little higher > + compatible = "generic-adc-thermal"; > + #thermal-sensor-cells = <0>; > + #io-channel-cells = <0>; > + io-channels = <&pm7250b_adc ADC5_BAT_THERM_30K_PU>; > + io-channel-names = "sensor-channel"; > + /* > + * Voltage to temperature table for 10kΩ (B=3435K) NTC with a > + * 1.875V reference and 30kΩ pull-up. > + */ I think this looks good. Is this data going to be correct for all/most devices (i.e. is there a single battery sku)? Konrad