Merge tag 'hwmon-for-linus-v4.18' of...

  must have the RPM values in ascending order.

- alarm-gpios: This pin going active indicates something is wrong with

  the fan, and a udev event will be fired.

- cooling-cells: If used as a cooling device, must be <2>

- #cooling-cells: If used as a cooling device, must be <2>

  Also see: Documentation/devicetree/bindings/thermal/thermal.txt

  min and max states are derived from the speed-map of the fan.

ltc2990: Linear Technology LTC2990 power monitor

Required properties:

- compatible: Must be "lltc,ltc2990"

- reg: I2C slave address

- lltc,meas-mode:

	An array of two integers for configuring the chip measurement mode.

	The first integer defines the bits 2..0 in the control register. In all

	cases the internal temperature and supply voltage are measured. In

	addition the following input measurements are enabled per mode:

		0: V1, V2, TR2

		1: V1-V2, TR2

		2: V1-V2, V3, V4

		3: TR1, V3, V4

		4: TR1, V3-V4

		5: TR1, TR2

		6: V1-V2, V3-V4

		7: V1, V2, V3, V4

	The second integer defines the bits 4..3 in the control register. This

	allows a subset of the measurements to be enabled:

		0: Internal temperature and supply voltage only

		1: TR1, V1 or V1-V2 only per mode

		2: TR2, V3 or V3-V4 only per mode

		3: All measurements per mode

Example:

ltc2990@4c {

	compatible = "lltc,ltc2990";

	reg = <0x4c>;

	lltc,meas-mode = <7 3>;	/* V1, V2, V3, V4 */

};

to register a hardware monitoring device. It creates the standard sysfs

attributes in the hardware monitoring core, letting the driver focus on reading

from and writing to the chip instead of having to bother with sysfs attributes.

Its parameters are described in more detail below.

The parent device parameter cannot be NULL with non-NULL chip info. Its

parameters are described in more detail below.

devm_hwmon_device_register_with_info is similar to

hwmon_device_register_with_info. However, it is device managed, meaning the

    Datasheet: http://www.linear.com/product/ltc2990

Author: Mike Looijmans <mike.looijmans@topic.nl>

        Tom Levens <tom.levens@cern.ch>

Description

LTC2990 is a Quad I2C Voltage, Current and Temperature Monitor.

The chip's inputs can measure 4 voltages, or two inputs together (1+2 and 3+4)

can be combined to measure a differential voltage, which is typically used to

measure current through a series resistor, or a temperature.

This driver currently uses the 2x differential mode only. In order to support

other modes, the driver will need to be expanded.

measure current through a series resistor, or a temperature with an external

diode.

Usage Notes

Sysfs attributes

----------------

in0_input     Voltage at Vcc pin in millivolt (range 2.5V to 5V)

temp1_input   Internal chip temperature in millidegrees Celcius

A subset of the following attributes are visible, depending on the measurement

mode of the chip.

in[1-4]_input Voltage at V[1-4] pin in millivolt

temp2_input   External temperature sensor TR1 in millidegrees Celcius

temp3_input   External temperature sensor TR2 in millidegrees Celcius

curr1_input   Current in mA across V1-V2 assuming a 1mOhm sense resistor

curr2_input   Current in mA across V3-V4 assuming a 1mOhm sense resistor

The "curr*_input" measurements actually report the voltage drop across the

input pins in microvolts. This is equivalent to the current through a 1mOhm

sense resistor. Divide the reported value by the actual sense resistor value

in mOhm to get the actual value.

in0_input     Voltage at Vcc pin in millivolt (range 2.5V to 5V)

temp1_input   Internal chip temperature in millidegrees Celcius

curr1_input   Current in mA across v1-v2 assuming a 1mOhm sense resistor.

curr2_input   Current in mA across v3-v4 assuming a 1mOhm sense resistor.

W:	http://hwmon.wiki.kernel.org/

T:	git git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git

S:	Maintained

F:	Documentation/devicetree/bindings/hwmon/

F:	Documentation/hwmon/

F:	drivers/hwmon/

F:	include/linux/hwmon*.h