hwmon: (pmbus) Document Infineon PXE1610 driver

Kernel driver pxe1610

=====================

Supported chips:

  * Infineon PXE1610

    Prefix: 'pxe1610'

    Addresses scanned: -

    Datasheet: Datasheet is not publicly available.

  * Infineon PXE1110

    Prefix: 'pxe1110'

    Addresses scanned: -

    Datasheet: Datasheet is not publicly available.

  * Infineon PXM1310

    Prefix: 'pxm1310'

    Addresses scanned: -

    Datasheet: Datasheet is not publicly available.

Author: Vijay Khemka <vijaykhemka@fb.com>

Description

-----------

PXE1610/PXE1110 are Multi-rail/Multiphase Digital Controllers

and compliant to

	-- Intel VR13 DC-DC converter specifications.

	-- Intel SVID protocol.

Used for Vcore power regulation for Intel VR13 based microprocessors

	-- Servers, Workstations, and High-end desktops

PXM1310 is a Multi-rail Controller and it is compliant to

	-- Intel VR13 DC-DC converter specifications.

	-- Intel SVID protocol.

Used for DDR3/DDR4 Memory power regulation for Intel VR13 and

IMVP8 based systems

Usage Notes

-----------

This driver does not probe for PMBus devices. You will have

to instantiate devices explicitly.

Example: the following commands will load the driver for an PXE1610

at address 0x70 on I2C bus #4:

# modprobe pxe1610

# echo pxe1610 0x70 > /sys/bus/i2c/devices/i2c-4/new_device

It can also be instantiated by declaring in device tree

Sysfs attributes

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

curr1_label		"iin"

curr1_input		Measured input current

curr1_alarm		Current high alarm

curr[2-4]_label		"iout[1-3]"

curr[2-4]_input		Measured output current

curr[2-4]_crit		Critical maximum current

curr[2-4]_crit_alarm	Current critical high alarm

in1_label		"vin"

in1_input		Measured input voltage

in1_crit		Critical maximum input voltage

in1_crit_alarm		Input voltage critical high alarm

in[2-4]_label		"vout[1-3]"

in[2-4]_input		Measured output voltage

in[2-4]_lcrit		Critical minimum output voltage

in[2-4]_lcrit_alarm	Output voltage critical low alarm

in[2-4]_crit		Critical maximum output voltage

in[2-4]_crit_alarm	Output voltage critical high alarm

power1_label		"pin"

power1_input		Measured input power

power1_alarm		Input power high alarm

power[2-4]_label	"pout[1-3]"

power[2-4]_input	Measured output power

temp[1-3]_input		Measured temperature

temp[1-3]_crit		Critical high temperature

temp[1-3]_crit_alarm	Chip temperature critical high alarm

temp[1-3]_max		Maximum temperature

temp[1-3]_max_alarm	Chip temperature high alarm