kernel/drivers/hwmon/pmbus, branch linux-rolling-stable

hwmon: (pmbus/q54sj108a2) fix stack overflow in debugfs read

2026-03-19T15:15:19Z

commit 25dd70a03b1f5f3aa71e1a5091ecd9cd2a13ee43 upstream. The q54sj108a2_debugfs_read function suffers from a stack buffer overflow due to incorrect arguments passed to bin2hex(). The function currently passes 'data' as the destination and 'data_char' as the source. Because bin2hex() converts each input byte into two hex characters, a 32-byte block read results in 64 bytes of output. Since 'data' is only 34 bytes (I2C_SMBUS_BLOCK_MAX + 2), this writes 30 bytes past the end of the buffer onto the stack. Additionally, the arguments were swapped: it was reading from the zero-initialized 'data_char' and writing to 'data', resulting in all-zero output regardless of the actual I2C read. Fix this by: 1. Expanding 'data_char' to 66 bytes to safely hold the hex output. 2. Correcting the bin2hex() argument order and using the actual read count. 3. Using a pointer to select the correct output buffer for the final simple_read_from_buffer call. Fixes: d014538aa385 ("hwmon: (pmbus) Driver for Delta power supplies Q54SJ108A2") Cc: stable@vger.kernel.org Signed-off-by: Sanman Pradhan Link: https://lore.kernel.org/r/20260304235116.1045-1-sanman.p211993@gmail.com Signed-off-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman

hwmon: (pmbus/mpq8785) fix VOUT_MODE mismatch during identification

2026-02-26T23:01:04Z

[ Upstream commit 9e33c1dba22431bea9b2bf48adf56859e52fc7ec ] When MPQ8785 reports VOUT_MODE as VID mode, mpq8785_identify() configures the driver for direct mode. The subsequent pmbus_identify_common() check then fails due to a mismatch between the reported mode and the configured mode, causing device initialization to fail. Override the reported VOUT_MODE to direct mode to keep the driver configuration consistent with the reported mode and allow successful device initialization. This does not change how voltages are interpreted, but avoids a false identification failure caused by mismatched mode handling. Fixes: f20b4a931130c ("hwmon: Add driver for MPS MPQ8785 Synchronous Step-Down Converter") Signed-off-by: Carl Lee Link: https://lore.kernel.org/r/20260210-dt-bindings-hwmon-pmbus-mpq8785-add-mpq8786-support-v3-1-84636ccfe76f@amd.com Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin

Merge tag 'hwmon-for-v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

2025-12-04T20:19:49Z

Pull hwmon updates from Guenter Roeck: "New drivers: - Apple Silicon SMC - TSC1641 I2C power monitor - MPS MP9945 - MAX17616 - MP2925 and MP2929 Added support for new devices to existing drivers: - dell-smm: Add Dell G5 5505 to fan control whitelist - aspeed-g6-pwm-tach: Support for AST2700 - asus-ec-sensors: Support for ROG STRIX X470-I GAMING, ROG STRIX X870-F GAMING WIFI, ROG STRIX X870E-H GAMING WIFI7, and Pro WS TRX50-SAGE WIFI - k10temp: Support for AMD Steam Deck APU ID - pmbus/isl68137: Support for raa229141 - aht10: Support for dht20 - adt7410: Support for ADT7422 - peci: Support for Intel Emerald Rapids - nct6775: Support for ASUS ROG STRIX X870E-H GAMING WIFI7 - pmbus/max34440: Support for ADPM12200 - ntc-thermistor: Support for Murata ncp18wm474 Infrastructure updates: - Utilize subsystem locking in various drivers - ltc4282, ltc2947: Use the new energy64 attribute Bug fixes: - Various drivers: Fixes to avoid TOCTOU, mostly in macro functions evaluating parameters multiple times, as well as missing locks - max6697: Fix regmap leak on probe failure - sy7636a: Fix regulator_enable resource leak on error path - asus-ec-sensors: Correct Pro WS TRX50-SAGE WIFI entry Other changes and improvements: - w83781d, lm78: Drop REALLY_SLOW_IO - Fix broken datasheet links in various drivers And various other minor fixes and improvements" * tag 'hwmon-for-v6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (110 commits) hwmon: (dell-smm) Add Dell G5 5505 to fan control whitelist hwmon: (max16065) Use local variable to avoid TOCTOU hwmon: (w83l786ng) Convert macros to functions to avoid TOCTOU hwmon: (max6697) fix regmap leak on probe failure hwmon/w83781d: Drop REALLY_SLOW_IO setting hwmon/lm78: Drop REALLY_SLOW_IO setting hwmon: sy7636a: Fix regulator_enable resource leak on error path hwmon: (adm1026) Convert macros to functions to avoid TOCTOU hwmon: (adm1029) Add locking to avoid TOCTOU hwmon: (lm87) Convert macros to functions to avoid TOCTOU hwmon: (asus-ec-sensors) correct Pro WS TRX50-SAGE WIFI entry hwmon: (vt8231) Convert macros to functions to avoid TOCTOU hwmon: (emc2103) Add locking to avoid TOCTOU hwmon: (aspeed-g6-pwm-tach): Add AST2700 compatible string dt-bindings: hwmon: Add AST2700 compatible hwmon: (asus-ec-sensors) add ROG STRIX X470-I GAMING hwmon: (vt1211) Convert macros to functions to avoid TOCTOU hwmon: (k10temp) Add AMD Steam Deck APU ID hwmon: Add Apple Silicon SMC hwmon driver Documentation/hwmon: Fix broken datasheet links for zl6100 ...

hwmon/pmbus: (isl68137) Add support for raa229141

2025-11-12T20:13:41Z

The RAA229141A is a digital dual output multiphase (X+Y ≤ 12) PWM controller designed to be compliant with Intel VR13, VR13.HC, VR14 and VR14.Cloud specifications, targeting VCORE and auxiliary rails. The RAA229141A supports the Intel SVID interface along with PMBus V1.3 specifications, making it ideal for controlling the microprocessor core and system rails in Intel VR13, VR13.HC, VR14 and VR14.Cloud platforms. Signed-off-by: Jeff Lin Link: https://lore.kernel.org/r/20251106104519.2014853-1-jefflin994697@gmail.com Signed-off-by: Guenter Roeck

hwmon: (pmbus/isl68137) Fix child node reference leak on early return

2025-10-20T01:56:14Z

In the case of an early return, the reference to the child node needs to be released. Use for_each_child_of_node_scoped to fix the issue. Fixes: 3996187f80a0e ("hwmon: (pmbus/isl68137) add support for voltage divider on Vout") Signed-off-by: Erick Karanja Link: https://lore.kernel.org/r/20251012181249.359401-1-karanja99erick@gmail.com [groeck: Updated subject/description] Signed-off-by: Guenter Roeck

hwmon: (pmbus/max34440) Update adpm12160 coeff due to latest FW

2025-10-20T01:56:14Z

adpm12160 is a dc-dc power module. The firmware was updated and the coeeficients in the pmbus_driver_info needs to be updated. Since the part has not yet released with older FW, this permanent change to reflect the latest should be ok. Signed-off-by: Alexis Czezar Torreno Link: https://lore.kernel.org/r/20251001-hwmon-next-v1-1-f8ca6a648203@analog.com Fixes: 629cf8f6c23a ("hwmon: (pmbus/max34440) Add support for ADPM12160") Cc: stable@vger.kernel.org # v6.16+ Signed-off-by: Guenter Roeck

hwmon: (pmbus) add driver for MPS MP9945

2025-10-15T18:02:43Z

Add support for mp9945 device from Monolithic Power Systems, Inc. (MPS) vendor. This is a single phase digital step down converter. Signed-off-by: Cosmo Chou Link: https://lore.kernel.org/r/20251009205458.396368-2-chou.cosmo@gmail.com Signed-off-by: Guenter Roeck

hwmon: (pmbus/max34440): add support adpm12200

2025-10-15T18:02:42Z

ADPM12200 is a quarter brick DC/DC Power Module. It is a high power non-isolated converter capable of delivering regulated 12V with continuous power level of 2000W. Uses PMBus. Signed-off-by: Alexis Czezar Torreno Link: https://lore.kernel.org/r/20251001-hwmon-next-v1-2-f8ca6a648203@analog.com Signed-off-by: Guenter Roeck

hwmon: (pmbus/max17616) add driver for max17616

2025-10-15T18:01:35Z

Add support for MAX17616/MAX17616A current-limiter with overvoltage/surge, undervoltage, reverse polarity, loss of ground protection with PMBus interface. The PMBus interface allows monitoring of input/output voltages, output current and temperature. Signed-off-by: Kim Seer Paller Link: https://lore.kernel.org/r/20250930-upstream-max17616-v1-2-1525a85f126c@analog.com [groeck: Fixed htmldocs 'WARNING: Title underline too short' as reported by Kriish Sharma ] Signed-off-by: Guenter Roeck

hwmon: Add MP2925 and MP2929 driver

2025-10-12T21:14:22Z

Add support for MPS VR mp2925 and mp2929 controller. This driver exposes telemetry and limit value readings and writtings. Signed-off-by: Wensheng Wang Link: https://lore.kernel.org/r/20250928092845.1394718-2-wenswang@yeah.net Signed-off-by: Guenter Roeck