Documentation/hwmon/lt7182s.rst

.. SPDX-License-Identifier: GPL-2.0

Kernel driver lt7182s
=====================

Supported chips:

  * ADI LT7182S

    Prefix: 'lt7182s'

    Addresses scanned: -

    Datasheet: https://www.analog.com/en/products/lt7182s.html

Author: Guenter Roeck <linux@roeck-us.net>


Description
-----------

LT7182S is a Dual Channel 6A, 20V PolyPhase Step-Down Silent Switcher with
Digital Power System Management support.


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 a LT7182S
at address 0x4f on I2C bus #4::

    # modprobe lt7182s
    # echo lt7182s 0x4f > /sys/bus/i2c/devices/i2c-4/new_device

It can also be instantiated by declaring an entry in device tree.


Sysfs attributes
----------------

======================= ====================================
curr[1-2]_label		"iin[12]"
curr[1-2]_input		Measured input current
curr[1-2]_max		Maximum input current
curr[1-2]_max_alarm	Current high alarm

curr[3-4]_label		"iout[1-2]"
curr[3-4]_input		Measured output current
curr[3-4]_highest	Highest measured output current
curr[3-4]_max		Maximum output current
curr[3-4]_max_alarm	Output current high alarm

in[1-2]_label		"vin[12]"
in[1-2]_input		Measured input voltage
in[1-2]_highest		Highest measured input voltage
in[1-2]_crit		Critical maximum input voltage
in[1-2]_crit_alarm	Input voltage critical high alarm
in[1-2]_min		Minimum input voltage
in[1-2]_min_alarm	Input voltage low alarm
in[1-2]_rated_min	Rated minimum input voltage
in[1-2]_rated_max	Rated maximum input voltage
in1_reset_history	Write to reset history for all attributes

in[3-5]_label		"vmon[1-3]"
in[3-5]_input		Measured voltage on ITH1/ITH2/EXTVCC pins
			Only available if enabled with MFR_ADC_CONTROL_LT7182S
			command.

in[3-4|6-7]_label	"vout[1-2]"
in[3-4|6-7]_input	Measured output voltage
in[3-4|6-7]_highest	Highest measured output voltage
in[3-4|6-7]_lcrit	Critical minimum output voltage
in[3-4|6-7]_lcrit_alarm	Output voltage critical low alarm
in[3-4|6-7]_min		Minimum output voltage
in[3-4|6-7]_max_alarm	Output voltage low alarm
in[3-4|6-7]_max		Maximum output voltage
in[3-4|6-7]_max_alarm	Output voltage high alarm
in[3-4|6-7]_crit	Critical maximum output voltage
in[3-4|6-7]_crit_alarm	Output voltage critical high alarm

power[1-2]_label	"pout[1-2]"
power[1-2]_input	Measured output power

temp1_input		Measured temperature
temp1_crit		Critical high temperature
temp1_crit_alarm	Chip temperature critical high alarm
temp1_max		Maximum temperature
temp1_max_alarm		Chip temperature high alarm
======================= ====================================