Updated version of the ltc2990 driver which supports all measurement
modes (current, voltage, temperature) available in the chip.

If devicetree is used, the mode must be specified with the property
"lltc,meas-mode". The format and possible values of the property are
described in the binding.

If devicetree is not used, the mode of the chip will not be configured.
Unless the chip is configured by another source, only the internal
temperature and supply voltage will be measured.
Signed-off-by: NTom Levens <tom.levens@cern.ch>
Tested-By: mike.looijmans@topic.nl
[groeck: Fixed compiler warning]
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

hwmon_device_register_with_info() registration API requires a
non-NULL parent device when chip is non-NULL.

This commit adds a check and documents this requirement.
Signed-off-by: NLucas Magasweran <lucas.magasweran@ieee.org>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Since autodetection of this chip was removed, it makes sense to add prefix
max6635 so that the device can be instantiated by its actual name.
Signed-off-by: NAlvaro Gamez Machado <alvaro.gamez@hazent.com>
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The chip is quite similar to other chips in the series,
but as usual it comes with its own quirks.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Maxim MAX663x family are mostly compatible with LM92, but they lack any
identification register. Weakening the detect function would make it prone
to false positives, and current one doesn't detect all chips.  Therefore,
the detect function for max6635 devices is removed in favor of explicit
device instatiation.
Signed-off-by: NAlvaro Gamez Machado <alvaro.gamez@hazent.com>
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

NCT6796D is mostly compatible to NCT6795D. It supports an additional
pwm control and fan speed channel.

While we are at it, update documentation for NCT6795D.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The previously used URL is dead.

Sensirion provides permalinks for their product datasheets at
https://www.sensirion.com/en/about-us/links/.
Signed-off-by: NDanilo Bargen <mail@dbrgn.ch>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The previously used URLs are dead.

Sensirion provides permalinks for their product datasheets at
https://www.sensirion.com/en/about-us/links/.
Signed-off-by: NDanilo Bargen <mail@dbrgn.ch>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The dual tachometer feature is implemented in hardware with a TACHSEL
input to indicate the rotor under measurement, and exposed on the device
by extending the READ_FAN_SPEED_1 word with two extra bytes*. The need
to read the non-standard four-byte response leads to a cut-down
implementation of i2c_smbus_xfer_emulated() included in the driver.
Further, to expose the second rotor tachometer value to userspace the
values are exposed through virtual pages. We re-route accesses to
FAN_CONFIG_1_2 and READ_FAN_SPEED_1 on pages 23-28 (not defined by the
hardware) to the same registers on pages 0-5, and with the latter command
we extract the value from the second word of the four-byte response.

* The documentation recommends the slower rotor be associated with
TACHSEL=0, which corresponds to the first word of the response. The
TACHSEL=0 measurement is used by the controller's closed-loop fan
management to judge target fan rate.
Signed-off-by: NAndrew Jeffery <andrew@aj.id.au>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The implementation makes use of the new fan control virtual registers
exposed by the pmbus core. It mixes use of the default implementations
with some overrides via the read/write handlers to handle FAN_COMMAND_1
on the MAX31785, whose definition breaks the value range into various
control bands dependent on RPM or PWM mode.
Signed-off-by: NAndrew Jeffery <andrew@aj.id.au>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

LM25063 was never released. Drop support for it.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Add documentation for the w83773g driver.
Signed-off-by: NLei YU <mine260309@gmail.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The Maxim MAX31785 is a PMBus device providing closed-loop, multi-channel
fan management with temperature and remote voltage sensing. It supports
various fan control features, including PWM frequency control, temperature
hysteresis, dual tachometer measurements, and fan health monitoring.

This patch presents a basic driver using only the existing features of the
PMBus subsystem.
Signed-off-by: NAndrew Jeffery <andrew@aj.id.au>
[groeck: Modified description to clarify that fan control is not yet provided]
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

After finding out there are active users of this sensor I noticed:

- It has a single PXA27x board file using the platform data
- The platform data is only used to carry two GPIO pins, all other
  fields are unused
- The driver does not use GPIO descriptors but the legacy GPIO
  API

I saw we can swiftly fix this by:

- Killing off the platform data entirely
- Define a GPIO descriptor lookup table in the board file
- Use the standard devm_gpiod_get() to grab the GPIO descriptors
  from either the device tree or the board file table.

This compiles, but needs testing.

Cc: arm@kernel.org
Cc: Marco Franchi <marco.franchi@nxp.com>
Cc: Davide Hug <d@videhug.ch>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Tested-by: NMarco Franchi <marco.franchi@nxp.com>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The TI LM5066I hotswap controller is a more accurate version of the
LM5066 device already supported. It has different measurement conversion
coefficients than the LM5066, so it needs to be recognized as a
different device.
Signed-off-by: NXo Wang <xow@google.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Signed-off-by: NEdward A. James <eajames@us.ibm.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

sysfs store functions should return the number of bytes written.
Returning zero results in an endless loop.

Fixes: 08426eda ("hwmon: Add driver for FTS BMC chip "Teutates"")
Signed-off-by: NThilo Cestonaro <thilo.cestonaro@ts.fujitsu.com>
[groeck: Clean up documentation change and description]
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

include/linux/i2c is not for client devices. Move the header file to a
more appropriate location.
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

include/linux/i2c is not for client devices. Move the header file to a
more appropriate location.
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

include/linux/i2c is not for client devices. Move the header file to a
more appropriate location.
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

When enabled temperature smoothing allows ramping the fan speed over a
configurable period of time instead of jumping to the new speed
instantaneously.
Signed-off-by: NChris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

By default adt7475 will stop the fans (pwm duty cycle 0%) when the
temperature drops past Tmin - hysteresis. Some systems want to keep the
fans moving even when the temperature drops so add new sysfs attributes
that configure the enhanced acoustics min 1-3 which allows the fans to
run at the minimum configure pwm duty cycle.
Signed-off-by: NChris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

IR35221 is a Digital DC-DC Multiphase Converter
Signed-off-by: NSamuel Mendoza-Jonas <sam@mendozajonas.com>
[groeck: Preserve alphabetic order in Kconfig;
	add missing break statements (from Dan Carpenter);
	add missing error checks]
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The ASPEED AST2400/2500 PWM controller supports 8 PWM output ports.
The ASPEED AST2400/2500 Fan tach controller supports 16 tachometer
inputs.
The device driver matches on the device tree node. The configuration
values are read from the device tree and written to the respective
registers.
The driver provides a sysfs entries through which the user can
configure the duty-cycle value (ranging from 0 to 100 percent) and read
the fan tach rpm value.
Signed-off-by: NJaghathiswari Rankappagounder Natarajan <jaghu@google.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Signed-off-by: NChris Packham <chris.packham@alliedtelesis.co.nz>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Clarify that the name attribute must report a valid name, and the rules
for valid names. Also clarify that the name parameter must be provided
for all supported API functions.
Reviewed-by: NJean Delvare <jdelvare@suse.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Add support for Texas Instruments TMP122/124 which are nearly identical to
their TMP121/123 except that they also support programmable temperature
thresholds.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Signed-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

Expose the per-chip unique identifier so it can be used to identify the
sensor producing the measurements.
Signed-off-by: NPeter A. Bigot <pab@pabigot.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Add support for the TI TMP108 temperature sensor with some device
configuration parameters.
Signed-off-by: NJohn Muir <john@jmuir.com>
[groeck: Initialize of_match_table]
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The 'groups' parameter of hwmon_device_register_with_info() and
devm_hwmon_device_register_with_info() is only necessary if extra
non-standard attributes need to be provided. Rename the parameter
to extra_groups and clarify the documentation.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Inform the user that hwmon_device_register() is deprecated,
and suggest conversion to the newest API. Also remove
hwmon_device_register() from the kernel API documentation.

Note that hwmon_device_register() is not marked as __deprecated()
since doing so might result in build errors.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Describing chip attributes as "attributes which apply to the entire chip"
is confusing. Rephrase to "attributes which are not bound to a specific
input or output".

Also rename hwmon_chip_attr_templates[] to hwmon_chip_attrs[] to indicate
that the respective strings strings are not templates but actual attribute
names.
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Add support for the tc654 and tc655 fan controllers from Microchip.

http://ww1.microchip.com/downloads/en/DeviceDoc/20001734C.pdfSigned-off-by: NChris Packham <chris.packham@alliedtelesis.co.nz>
Acked-by: NRob Herring <robh@kernel.org>
[groeck: Fixed continuation line alignments]
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The previous patch renamed several files that are cross-referenced
along the Kernel documentation. Adjust the links to point to
the right places.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

The fan can be stopped by writing "3" to pwm1_enable in sysfs.

Add devicetree property for early initialization of the fan controller
to prevent overheating, for example when resetting the board while the
fan was completely turned off.

Also improve error reporting, I2C failures were ignored while writing
new values.
Signed-off-by: NMike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The UCD90160 Power Supply Sequencer reuses the existing register layout,
so just an id addition was required.
Signed-off-by: NMatthew Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: NRonak Desai <ronak.desai@rockwellcollins.com>
[groeck: Updated description, ordered alphabetically, added documentation]
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

This patch adds hardware temperature and power reading support for
APM X-Gene SoC using the mailbox communication interface.
Signed-off-by: NHoan Tran <hotran@apm.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

The ADT7470 supports a variety of PWM frequencies. This patch allows the
frequency to be configured and viewed through the sysfs entry pwm1_freq.
Signed-off-by: NJoshua Scott <joshua.scott@alliedtelesis.co.nz>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Add basic pwm attribute support (no auto attributes) to new API.
Reviewed-by: NJonathan Cameron <jic23@kernel.org>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>