linux.git/Documentation/hwmon, branch v4.17.4

hwmon: (lm92) Add max6635 to lm92_id[]

2018-03-22T16:33:24+00:00

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: Alvaro Gamez Machado 
Reviewed-by: Jean Delvare 
Signed-off-by: Guenter Roeck

hwmon: (pmbus/adm1275) Add support for ADM1272

2018-03-22T16:32:17+00:00

The chip is quite similar to other chips in the series,
but as usual it comes with its own quirks.

Signed-off-by: Guenter Roeck

hwmon: (lm92) Do not try to detect MAX6635

2018-03-22T16:32:05+00:00

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: Alvaro Gamez Machado 
Reviewed-by: Jean Delvare 
Signed-off-by: Guenter Roeck

hwmon: (nct6775) Add support for NCT6796D

2018-03-11T03:00:14+00:00

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: Guenter Roeck

hwmon: (sht3x) Update data sheet URL

2018-03-11T03:00:14+00:00

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: Danilo Bargen 
Signed-off-by: Guenter Roeck

hwmon: (sht21) Update data sheet URLs

2018-03-11T03:00:14+00:00

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: Danilo Bargen 
Signed-off-by: Guenter Roeck

hwmon: (pmbus/max31785) Add dual tachometer support

2018-01-02T23:05:34+00:00

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: Andrew Jeffery 
Signed-off-by: Guenter Roeck

hwmon: (pmbus/max31785) Add fan control

2018-01-02T23:05:34+00:00

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: Andrew Jeffery 
Signed-off-by: Guenter Roeck

hwmon: (pmbus/lm25066) Drop support for LM25063

2018-01-02T23:05:34+00:00

LM25063 was never released. Drop support for it.

Signed-off-by: Guenter Roeck

hwmon: (w83773g) Add documentation

2018-01-02T23:05:34+00:00

Add documentation for the w83773g driver.

Signed-off-by: Lei YU 
Signed-off-by: Guenter Roeck