linux-toradex.git/drivers/hwmon/Makefile, branch master

Merge tag 'usb-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

2026-06-22T19:09:47+00:00

Pull USB and Thunderbolt driver updates from Greg KH:
 "Here is the big set of USB and Thunderbolt driver changes for 7.2-rc1.

  Lots of little stuff in here, major highlights include:

   - USB4STREAM support for Thunderbolt devices. A new way to send "raw"
     data very quickly over a USB4 connection to another system directly

   - Other thunderbolt updates and changes to make the stream code work

   - xhci driver updates and additions

   - typec driver updates and additions

   - usb gadget driver updates and fixes for reported issues

   - zh_CN documentation translation of the USB documentation

   - usb-serial driver updates

   - dts cleanups for some USB platforms

   - other minor USB driver updates and tweaks

  All of these have been in linux-next for over a week with no reported
  issues, most of them for many many weeks"

* tag 'usb-7.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (131 commits)
  usb: ucsi: huawei_gaokun: support mode switching
  thunderbolt: debugfs: Fix sideband write size check
  thunderbolt: debugfs: Fix margining error counter buffer leak
  usb: host: xhci-rcar: Split R-Car Gen2 and Gen3 .plat_start() handling
  usb: host: xhci-rcar: Remove SET_XHCI_PLAT_PRIV_FOR_RCAR() macro
  usb: xhci: allocate internal DCBAA mirror dynamically
  usb: xhci: allocate DCBAA based on host controller max slots
  usb: xhci: refactor DCBAA struct
  xhci: Prevent queuing new commands if xhci is inaccessible
  xhci: dbc: detect and recover hung DbC during enumeraton
  xhci: dbc: add timestamps to DbC state changes in a new helper.
  xhci: dbc: add helper to set and clear DbC DCE enable bit
  xhci: dbc: serialize enabling and disabling dbc
  xhci: dbc: Fix sysfs ABI Documentation for xhci dbc states
  usb: xhci: Improve Soft Retries after short transfers
  usb: xhci: Remove isochronous URB_SHORT_NOT_OK handling
  usb: xhci: Remove skip_isoc_td()
  usb: xhci: Simplify xhci_quiesce()
  usb: xhci: remove legacy 'num_trbs_free' tracking
  usb: xhci: fix typo in xhci_set_port_power() comment
  ...

hwmon: temperature: add support for EMC1812

2026-06-10T19:49:57+00:00

This is the hwmon driver for Microchip EMC1812/13/14/15/33
Multichannel Low-Voltage Remote Diode Sensor Family.

EMC1812 has one external remote temperature monitoring channel.
EMC1813 has two external remote temperature monitoring channels.
EMC1814 has three external remote temperature monitoring channels,
channels 2 and 3 support anti parallel diode.
EMC1815 has four external remote temperature monitoring channels and
channels 1/2  and 3/4 support anti parallel diode.
EMC1833 has two external remote temperature monitoring channels and
channels 1 and 2 support anti parallel diode.
Resistance Error Correction is supported on channels 1/2 and 3/4.

Signed-off-by: Marius Cristea 
Link: https://lore.kernel.org/r/20260610-hw_mon-emc1812-v11-2-cef809af5c19@microchip.com
Signed-off-by: Guenter Roeck

hwmon: ltc4283: Add support for the LTC4283 Swap Controller

2026-06-09T15:28:55+00:00

Support the LTC4283 Hot Swap Controller. The device features programmable
current limit with foldback and independently adjustable inrush current to
optimize the MOSFET safe operating area (SOA). The SOA timer limits MOSFET
temperature rise for reliable protection against overstresses.

An I2C interface and onboard ADC allow monitoring of board current,
voltage, power, energy, and fault status.

Signed-off-by: Nuno Sá 
Link: https://lore.kernel.org/r/20260502-ltc4283-support-v13-2-1c206542e652@analog.com
Signed-off-by: Guenter Roeck

hwmon: add driver for ARCTIC Fan Controller

2026-06-09T15:22:59+00:00

Add hwmon driver for the ARCTIC Fan Controller, a USB HID device
(VID 0x3904, PID 0xF001) with 10 fan channels. Exposes fan speed in
RPM (read-only) and PWM duty cycle (0-255, read/write) via sysfs.

The device pushes IN reports at ~1 Hz containing RPM readings. PWM is
set via OUT reports; the device applies the new duty cycle and sends
back a 2-byte ACK (Report ID 0x02). The driver waits up to 1 s for
the ACK using a completion. Measured device latency: max ~563 ms over
500 iterations. PWM control is manual-only: the device never changes
duty cycle autonomously.

raw_event() may run in hardirq context, so fan_rpm[] is protected by
a spinlock with irq-save. pwm_duty[] is also protected by this spinlock
because reset_resume() clears it outside the hwmon core lock. The OUT
report buffer is built and write_pending is armed under the same lock so
that no reset_resume() can race with the pwm_duty[] snapshot. priv->buf
is exclusively accessed by write(), which the hwmon core serializes.

Signed-off-by: Aureo Serrano de Souza 
Link: https://lore.kernel.org/r/20260508064405.38676-1-aureo.serrano@arctic.de
Signed-off-by: Guenter Roeck

hwmon: add AMD Promontory 21 xHCI temperature sensor support

2026-05-21T14:48:41+00:00

Add an auxiliary-bus hwmon driver for the temperature sensor exposed by
AMD Promontory 21 (PROM21) xHCI PCI functions. The driver binds to the
"hwmon" auxiliary device published by the PROM21 xHCI PCI glue and
exposes the sensor as temp1_input under the prom21_xhci hwmon device.

The sensor is accessed through a PROM21 vendor index/data register pair
in the xHCI PCI MMIO BAR. The driver consumes parent-provided MMIO data
from the PROM21 PCI glue instead of inspecting the parent PCI driver's
drvdata. The read path restores the previous vendor index value after
sampling and does not runtime-resume the parent PCI device; reads from a
suspended parent return -ENODATA.

Document the supported device, register access, runtime PM behavior, and
sysfs lookup method. The documentation also records the observation
method used to identify the register pair and derive the conversion
formula.

Assisted-by: Codex:gpt-5.5
Signed-off-by: Jihong Min 
Reviewed-by: Mario Limonciello (AMD) 
Tested-by: Yaroslav Isakov 
Reviewed-by: Guenter Roeck 
Link: https://patch.msgid.link/20260519000732.2334711-3-hurryman2212@gmail.com
Signed-off-by: Greg Kroah-Hartman

hwmon: Remove stale CONFIG_SENSORS_SBRMI Makefile reference

2026-04-30T18:19:00+00:00

kconfiglint reports:

  X001: CONFIG_SENSORS_SBRMI referenced in Makefile but not defined
        in any Kconfig

The SB-RMI hardware monitoring driver was originally introduced in
commit 5a0f50d110b3 ("hwmon: Add support for SB-RMI power module") with
both a Kconfig entry (CONFIG_SENSORS_SBRMI) and a Makefile line
(obj-$(CONFIG_SENSORS_SBRMI) += sbrmi.o) in drivers/hwmon/.

Commit e156586764050 ("hwmon/misc: amd-sbi: Move core sbrmi from hwmon to
misc")
moved the driver to drivers/misc/amd-sbi/ to support additional
functionality beyond hardware monitoring. That commit correctly removed the
Kconfig entry from drivers/hwmon/Kconfig, moved the source file
drivers/hwmon/sbrmi.c to drivers/misc/amd-sbi/sbrmi.c, and created new
Kconfig/Makefile entries in drivers/misc/amd-sbi/ with a renamed symbol
(CONFIG_AMD_SBRMI_I2C).

However, the Makefile line in drivers/hwmon/Makefile was not removed in
that commit. The orphaned line references a CONFIG symbol that no longer
exists and a source file that is no longer present, so it has no effect
on the build — but it is dead code that should be cleaned up.

Remove the stale Makefile reference.

Assisted-by: Claude:claude-opus-4-6 kconfiglint
Signed-off-by: Sasha Levin 
Link: https://lore.kernel.org/r/20260426000319.55908-1-sashal@kernel.org
Signed-off-by: Guenter Roeck

hwmon: add support for MCP998X

2026-04-11T07:02:13+00:00

Add driver for Microchip MCP998X/33 and MCP998XD/33D
Multichannel Automotive Temperature Monitor Family.

Signed-off-by: Victor Duicu 
Link: https://lore.kernel.org/r/20260403-add-mcp9982-hwmon-v12-2-b3bfb26ff136@microchip.com
[groeck: Add missing break; to avoid build warning]
Signed-off-by: Guenter Roeck

hwmon: (yogafan) Add support for Lenovo Yoga/Legion fan monitoring

2026-04-03T18:09:09+00:00

This driver provides fan speed monitoring for Lenovo Yoga, Legion, and
IdeaPad laptops by interfacing with the Embedded Controller (EC) via ACPI.

To address low-resolution sampling in Lenovo EC firmware, a Rate-Limited
Lag (RLLag) filter is implemented. The filter ensures a consistent physical
curve regardless of userspace polling frequency.

Hardware identification is performed via DMI-based quirk tables, which
map specific ACPI object paths and register widths (8-bit vs 16-bit)
deterministically.

Signed-off-by: Sergio Melas 
Link: https://lore.kernel.org/r/20260327221602.18832-1-sergiomelas@gmail.com
[groeck: Dropped double empty line in Kconfig]
Signed-off-by: Guenter Roeck

hwmon: Add LattePanda Sigma EC driver

2026-03-31T02:45:05+00:00

Add hardware monitoring support for the LattePanda Sigma SBC
(DFRobot, ITE IT8613E EC). The driver reads fan speed and
temperatures via direct port I/O, as the BIOS disables the
ACPI EC interface.

Signed-off-by: Mariano Abad 
Signed-off-by: Guenter Roeck

hwmon: (bt1-pvt) Remove not-going-to-be-supported code for Baikal SoC

2026-03-31T02:45:04+00:00

As noticed in the discussion [1] the Baikal SoC and platforms
are not going to be finalized, hence remove stale code.

Link: https://lore.kernel.org/lkml/22b92ddf-6321-41b5-8073-f9c7064d3432@infradead.org/ [1]
Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20260220143500.2401057-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Guenter Roeck