From: Rinat Muhamedgaliev via B4 Relay <devnull+rinat.muhamedgaliev.gmail.com@kernel.org>
To: linux-pm@vger.kernel.org
Cc: pali@kernel.org, sre@kernel.org, afd@ti.com,
konrad.dybcio@oss.qualcomm.com, david@ixit.cz, krzk@kernel.org,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
Rinat Muhamedgaliev <rinat.muhamedgaliev@gmail.com>
Subject: [PATCH v7] bq27xxx: support interchangeable OnePlus 6/6T fuel gauges
Date: Mon, 19 Oct 2026 02:03:38 +0300 [thread overview]
Message-ID: <20261019-master-v7-0-a1fc488d9c77@gmail.com> (raw)
OnePlus 6 and 6T replacement battery packs can contain either a bq27411 or a
bq27541 fuel gauge. The latter requires a different register map and produces
invalid battery readings when interpreted as a bq27411.
The I2C driver reads DeviceType while probing either of those compatible
devices and selects the matching profile.
The bq27541 path was tested on a OnePlus 6T with DeviceType 0x0541. It
reported 4.338 V, 100% capacity, 27.8 C, and Full/Good battery status.
Testing on an OnePlus 6 or 6T whose fuel gauge reports DeviceType 0x0421
(bq27411) would be appreciated.
Changes in v7:
- Determine the expected DeviceType through an extensible chip switch.
- Mark the probe-time list for extension with DeviceType-capable fuel gauges.
- Link to v6: https://patch.msgid.link/20261019-master-v6-0-c4b36129721e@gmail.com
Changes in v6:
- Compare the detected model with the compatible-selected model.
- Support both BQ27411-to-BQ27541 and BQ27541-to-BQ27411 detection.
- Document the pair of models checked at probe time.
- Link to v5: https://patch.msgid.link/20261018-master-v5-0-0be16441cdd1@gmail.com
Changes in v5:
- Report detected and expected DeviceType values instead of hard-coding chip names.
- Describe an unknown DeviceType as unrecognized.
- Link to v4: https://patch.msgid.link/20260928-master-v4-1-052c73ec1767@gmail.com
Changes in v4:
- Drop the generic compatible and binding update.
- Keep the established OnePlus DTS unchanged.
- Detect bq27541 from DeviceType in the bq27411 probe path.
- Send as a new thread.
---
Rinat Muhamedgaliev (1):
power: supply: bq27xxx: detect bq27541 behind bq27411 compatible
drivers/power/supply/bq27xxx_battery_i2c.c | 67 ++++++++++++++++++++++++++++++
1 file changed, 67 insertions(+)
---
base-commit: 830b3c68c1fb1e9176028d02ef86f3cf76aa2476
change-id: 20260927-master-bd0afd9696ef
Best regards,
--
Rinat Muhamedgaliev <rinat.muhamedgaliev@gmail.com>
next reply other threads:[~2026-10-18 23:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-18 23:03 Rinat Muhamedgaliev via B4 Relay [this message]
2026-10-18 23:03 ` [PATCH v7] power: supply: bq27xxx: detect bq27541 behind bq27411 compatible Rinat Muhamedgaliev via B4 Relay
2026-10-18 23:47 ` Pali Rohár
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