hwmon: (aquacomputer_d5next) Remove unneeded CONFIG_DEBUG_FS #ifdef

Remove the #ifdef check for CONFIG_DEBUG_FS and the empty variant
of aqc_debugfs_init(), because the debugfs functions already do nothing
if debugfs isn't enabled.

Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20231216140754.336775-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Check if temp sensors of legacy devices are connected

Return -ENODATA if a temp sensor of a legacy device
does not contain a reading.

Originally-from: Leonard Anderweit <leonard.anderweit@gmail.com>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20231016083559.139341-2-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for Aquacomputer High Flow USB and MPS Flow

Extend aquacomputer_d5next driver to expose various hardware sensors of the
Aquacomputer High Flow USB flow sensor, which communicates through a
proprietary USB HID protocol. This commit also adds support for the sensors
of the MPS Flow devices, as they have the same USB product ID and sensor
layouts. Implemented by Leonard Anderweit [1].

Internal and external temp sensor readings are available, along with
the flow sensor.

Additionally, serial number and firmware version are exposed through
debugfs.

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/90

Originally-from: Leonard Anderweit <leonard.anderweit@gmail.com>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20231016083559.139341-3-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add selective 200ms delay after sending ctrl report

Add a 200ms delay after sending a ctrl report to Quadro,
Octo, D5 Next and Aquaero to give them enough time to
process the request and save the data to memory. Otherwise,
under heavier userspace loads where multiple sysfs entries
are usually set in quick succession, a new ctrl report could
be requested from the device while it's still processing the
previous one and fail with -EPIPE. The delay is only applied
if two ctrl report operations are near each other in time.

Reported by a user on Github [1] and tested by both of us.

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/issues/82

Fixes: 752b927951ea ("hwmon: (aquacomputer_d5next) Add support for Aquacomputer Octo")
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20230807172004.456968-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Fix incorrect PWM value readout

Commit 662d20b3a5af ("hwmon: (aquacomputer_d5next) Add support for
temperature sensor offsets") changed aqc_get_ctrl_val() to return
the value through a parameter instead of through the return value,
but didn't fix up a case that relied on the old behavior. Fix it
to use the proper received value and not the return code.

Fixes: 662d20b3a5af ("hwmon: (aquacomputer_d5next) Add support for temperature sensor offsets")
Cc: stable@vger.kernel.org
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20230714120712.16721-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for Aquacomputer Leakshield

Extend aquacomputer_d5next driver to expose various hardware sensors of the
Aquacomputer Leakshield leak prevention system, which communicates
through a proprietary USB HID protocol. Implemented by Noah Bergbauer [1].

Two temperature sensors are exposed, along with pressure (current, min, max
and target), reservoir volume (total and filled), pump speed and flow. Pump
speed and flow values are user provided and allow the Leakshield to
optimize its operation. Writing them to the device is subject of future
patches.

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/41

Originally-from: Noah Bergbauer <main@ehvag.de>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20230520095447.509287-3-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Rename AQC_TEMP_SENSOR_DISCONNECTED

Rename the macro in question to AQC_SENSOR_NA because
more than just temperature sensors use this value to
indicate that they don't have a reading. Implemented by
Noah Bergbauer [1].

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/41

Originally-from: Noah Bergbauer <main@ehvag.de>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20230520095447.509287-2-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for Aquacomputer Aquastream XT

Extend aquacomputer_d5next driver to expose various hardware sensors of the
Aquacomputer Aquastream XT watercooling pump, which communicates
through a proprietary USB HID protocol. Implemented by Leonard Anderweit
[1] [2].

Coolant temp, fan IC and external temp sensor readings are available, along
with speed and voltage of both the pump and optionally connected fan.
It also exposes pump current.

Additionally, serial number and firmware version are exposed through
debugfs.

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/46
[2] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/49

Originally-from: Leonard Anderweit <leonard.anderweit@gmail.com>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20230416181702.9892-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: aquacomputer: constify pointers to hwmon_channel_info

Statically allocated array of pointed to hwmon_channel_info can be made
const for safety.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add fan PWM control for Aquaero

Add the option to control fan PWM on Aquacomputer Aquaero. The Aquaero is
the most complex Aquacomputer device, control is therefore more complicated
then on already supported devices.
Setting PWM requires multiple steps. First, an internal static PWM
controller is set to the desired PWM value. Second, the fan is set to use
that PWM controller. Last, the minimum and maximum accepted PWM values
of the fan are set to allow all possible PWM values.

Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20230214220221.15003-7-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add temperature offset control for Aquaero

Adds control over the Aquacomputer Aquaero temperature offset for all eight
temperature sensors.

Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20230214220221.15003-6-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add infrastructure for Aquaero control reports

Add information on the Aquacomputer Aquaero control report and disable the
control report checksum for Aquaero. The Aquaero does not use the checksum
so it must be disabled to avoid overwriting the last two bytes of the
control report.

Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20230214220221.15003-5-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Device dependent control report settings

Add device dependent control report id, secondary control report id,
secondary control report size and secondary control report for devices
which need different control report settings. All currently supported
devices use the same values.

Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20230214220221.15003-4-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Support writing multiple control values at once

Add new function aqc_set_ctrl_vals() to support changing multiple control
values at once while sending only one control report.

Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20230214220221.15003-3-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Support one byte control values

Add support for one byte control values. This extends aqc_set_ctrl_val()
and aqc_get_ctrl_val() with a type. Currently supported types are AQC_8
(one byte) and AQC_BE16 (two bytes big endian). More types will be added
in the future.

Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20230214220221.15003-2-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for Aquacomputer Aquastream Ultimate

Extend aquacomputer_d5next driver to expose various hardware sensors of the
Aquacomputer Aquastream Ultimate watercooling pump, which communicates
through a proprietary USB HID protocol.

Coolant temp and external temp sensor readings are available, along with
speed, power, voltage and current of both the pump and optionally connected
fan. It also exposes pressure and flow speed readings.

Additionally, serial number and firmware version are exposed through
debugfs.

Tested by a user on Github [1].

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/issues/50

Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20230203120324.579808-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for Aquacomputer Poweradjust 3

Extend aquacomputer_d5next driver to expose the temp sensor of the
Aquacomputer Poweradjust 3 fan controller, which communicates
through a proprietary USB HID protocol.

The Poweradjust 3 is not currently known to expose firmware version
and serial number, so don't create debugfs entries if their values
can't be retrieved.

Tested by a user on Github [1].

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/issues/57

Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20230131101210.8095-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for reading calculated Aquaero sensors

Add support for reading four calculated virtual temp sensors on the
Aquacomputer Aquaero. Values of these sensors are calculated on the
device itself based on what the user configured in the official software.
Configuring these sensors is not currently reverse engineered.

Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20230101190056.1357124-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Support sensors for Aquacomputer Aquaero

Add support for reading sensors of the Aquacomputer Aquaero 5/6 fan
controllers. These fan controllers supports 4 fans, 8 physical
temperature sensors, 8 virtual temperature sensors and 2 flow sensors.
Temperature and flow sensor reading implemented by Aleksa Savic [1] [2]
[3].

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/31
[2] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/51
[3] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/55

Originally-from: Aleksa Savic <savicaleksa83@gmail.com>
Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20221218113131.3752-7-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Make fan sensor offsets u16

Make fan sensor offsets u16 as u8 is insufficient for upcoming devices.

Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20221218113131.3752-6-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Device dependent serial number and firmware offsets

Add device dependent serial number and firmware offsets to support
devices with different offsets. All currently supported devices share
the same offsets. Implemented by Aleksa Savic [1].

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/31/commits/14c3acf78b17397edb5dd356e6f5943a9996a1f9

Originally-from: Aleksa Savic <savicaleksa83@gmail.com>
Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20221218113131.3752-5-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add structure for fan layout

Introduce structure for per device fan sensor offsets. This allows
reading fan sensors in aqc_raw_event() from devices which use a
different sensor layout in their status HID report. Currently only one
version is implemented as all supported devices use the same structure.

Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20221218113131.3752-4-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Restructure flow sensor reading

Read flow sensors the same way for all devices instead of in special
cases. Implemented by Aleksa Savic [1].

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/commit/1c10912c5fdc8287d88378bcf1ef14d596f29462

Originally-from: Aleksa Savic <savicaleksa83@gmail.com>
Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20221218113131.3752-3-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Rename AQC_TEMP_SENSOR_SIZE to AQC_SENSOR_SIZE

Rename AQC_TEMP_SENSOR_SIZE to AQC_SENSOR_SIZE to use with other sensor
types.

Signed-off-by: Leonard Anderweit <leonard.anderweit@gmail.com>
Link: https://lore.kernel.org/r/20221218113131.3752-2-leonard.anderweit@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for Quadro flow sensor pulses

Add support for reading and writing flow sensor pulses value on
the Aquacomputer Quadro. Implemented by Leonard Anderweit [1].

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/45

Originally-from: Leonard Anderweit <leonard.anderweit@gmail.com>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20221126071313.34356-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Clear up macros and comments

Reorganize macro definitions into sections for each supported
device, with additional comments on their purpose. This should
make it easier to follow what report each offset is coming
from. Also, reformat per-device initializations in
aqc_probe() to organize them into sections (fan info,
temp sensors, other parameters and lastly labels).

No functional changes.

Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20221107142455.655998-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for temperature sensor offsets

Add support for reading and writing temperature sensor offsets
on the Aquacomputer D5 Next, Farbwerk 360, Octo and Quadro,
for which the needed offsets are known. Implemented by
Leonard Anderweit [1].

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/22

Originally-from: Leonard Anderweit <leonard.anderweit@gmail.com>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20221024151039.7222-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for Aquacomputer High Flow Next

Extend aquacomputer_d5next driver to expose various hardware
sensors of the Aquacomputer High Flow Next flow sensor, which
communicates through a proprietary USB HID protocol.

The High Flow Next exposes +5V voltages, water quality, conductivity
and flow readings. A temperature sensor can be connected to it, in
which case it provides its reading and an estimation of the
dissipated/absorbed power in the liquid cooling loop.

Additionally, serial number and firmware version are exposed through
debugfs.

Registry offsets were discovered and tested by users on Github [1] [2].

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/issues/8
[2] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/34

Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20220907100739.806571-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for reading virtual temp sensors

Add support for reading virtual temperature sensors for the D5 Next, Octo,
Quadro and Farbwerk 360.

Virtual temperature sensors are written to the device by the user, pulling
from an arbitrary value source. Writing to them is not yet reverse
engineered, so the only way to set them for now is to use the official
software.

Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20220817121441.112198-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Fix Quadro fan speed offsets

The offsets for setting speeds of fans connected to Quadro are off by one.
Set them to their correct values.

The offsets as shown point to registers for setting the fan control mode,
which will be explored in future patches, but slipped in here. When
setting fan speeds, the resulting values were overlapping, which made the
fans still run in my initial testing.

Fixes: cdbe34da01e3 ("hwmon: (aquacomputer_d5next) Add support for Aquacomputer Quadro fan controller")
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20220914114327.6941-1-savicaleksa83@gmail.com
Cc: stable@vger.kenrel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for Aquacomputer Quadro fan controller

Extend aquacomputer_d5next driver to expose hardware temperature sensors
and fans of the Aquacomputer Quadro fan controller, which communicates
through a proprietary USB HID protocol. Implemented by Jack Doan [1].

Four temperature sensors and PWM controllable fans are available. The
liquid flow sensor is also exposed, implemented by Leonard Anderweit [2].

Additionally, serial number, firmware version and power-on count are
exposed through debugfs.

This driver has been tested on x86_64.

[1] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/5
[2] https://github.com/aleksamagicka/aquacomputer_d5next-hwmon/pull/9

Originally-from: Jack Doan <me@jackdoan.com>
Originally-from: Leonard Anderweit <leonard.anderweit@gmail.com>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20220727100606.9328-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for reading the +12V voltage sensor on D5 Next

Add support for reading the +12V voltage that the D5 Next pump receives.

Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20220726120203.33773-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add D5 Next fan control support

Define pump and fan speed register offsets in
D5 Next control report, as well as its size, to expose PWM fan control.

Originally-from: Jack Doan <me@jackdoan.com>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20220717171412.11142-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Move device-specific data into struct aqc_data

As preparation for adding support for more devices in upcoming patches,
move device-specific data, such as number of fans, temperature sensors,
register offsets etc. to struct aqc_data. This is made possible by
the fact that the supported Aquacomputer devices share the same layouts
of sensor substructures. This allows aqc_raw_event() and others to stay
general and not be cluttered with similar loops for each device.

Signed-off-by: Jack Doan <me@jackdoan.com>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20220707115050.90021-1-savicaleksa83@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Fix an error handling path in aqc_probe()

If no memory can be allocated, some resources still need to be released as
already done in the other error handling paths.

Fixes: 752b927951ea ("hwmon: (aquacomputer_d5next) Add support for Aquacomputer Octo")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/be6b955d50de140fcc96bd116150b435021bf567.1653225250.git.christophe.jaillet@wanadoo.fr
Reviewed-by: Aleksa Savic <savicaleksa83@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for Aquacomputer Farbwerk

Extend aquacomputer_d5next driver to expose hardware
temperature sensors of the Aquacomputer Farbwerk RGB controller, which
communicates through a proprietary USB HID protocol.

Four temperature sensors are available. Additionally, serial number and
firmware version are exposed through debugfs.

Also, add Jack Doan to MAINTAINERS for this driver.

Signed-off-by: Jack Doan <me@jackdoan.com>
Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/YmTcrq8Gzel0zYYD@jackdesk
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for Aquacomputer Octo

Extend aquacomputer_d5next driver to expose hardware temperature sensors
and fans of the Aquacomputer Octo fan controller, which communicates
through a proprietary USB HID protocol.

Four temperature sensors and eight PWM controllable fans are available.
Additionally, serial number, firmware version and power-on count are
exposed through debugfs.

This driver has been tested on x86_64.

Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Link: https://lore.kernel.org/r/20220404134212.9690-1-savicaleksa83@gmail.com
[groeck: Add missing "select CRC16"]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: (aquacomputer_d5next) Add support for Aquacomputer Farbwerk 360

Extend aquacomputer_d5next driver to expose hardware temperature sensors
of the Aquacomputer Farbwerk 360 RGB controller, which communicates through
a proprietary USB HID protocol.

Four temperature sensors are available. Additionally, serial number and
firmware version are exposed through debugfs.

This driver has been tested on x86_64.

Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

hwmon: add driver for Aquacomputer D5 Next

This driver exposes hardware sensors of the Aquacomputer D5 Next
watercooling pump, which communicates through a proprietary USB HID
protocol.

Available sensors are pump and fan speed, power, voltage and current, as
well as coolant temperature. Also available through debugfs are the serial
number, firmware version and power-on count.

Attaching a fan is optional and allows it to be controlled using
temperature curves directly from the pump. If it's not connected,
the fan-related sensors will report zeroes.

The pump can be configured either through software or via its physical
interface. Configuring the pump through this driver is not implemented,
as it seems to require sending it a complete configuration. That
includes addressable RGB LEDs, for which there is no standard sysfs
interface. Thus, that task is better suited for userspace tools.

This driver has been tested on x86_64, both in-kernel and as a module.

Signed-off-by: Aleksa Savic <savicaleksa83@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>