hwmon: Add driver for Texas Instruments TMP512/513 sensor chips.

   tmp108

   tmp401

   tmp421

   tmp513

   tps40422

   twl4030-madc-hwmon

   ucd9000

.. SPDX-License-Identifier: GPL-2.0

Kernel driver tmp513

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

Supported chips:

  * Texas Instruments TMP512

    Prefix: 'tmp512'

    Datasheet: http://www.ti.com/lit/ds/symlink/tmp512.pdf

  * Texas Instruments TMP513

    Prefix: 'tmp513'

    Datasheet: http://www.ti.com/lit/ds/symlink/tmp513.pdf

Authors:

	Eric Tremblay <etremblay@distech-controls.com>

Description

-----------

This driver implements support for Texas Instruments TMP512, and TMP513.

The TMP512 (dual-channel) and TMP513 (triple-channel) are system monitors

that include remote sensors, a local temperature sensor, and a high-side current

shunt monitor. These system monitors have the capability of measuring remote

temperatures, on-chip temperatures, and system voltage/power/current

consumption.

The temperatures are measured in degrees Celsius with a range of

-40 to + 125 degrees with a resolution of 0.0625 degree C.

For hysteresis value, only the first channel is writable. Writing to it

will affect all other values since each channels are sharing the same

hysteresis value. The hysteresis is in degrees Celsius with a range of

0 to 127.5 degrees with a resolution of 0.5 degree.

The driver exports the temperature values via the following sysfs files:

**temp[1-4]_input**

**temp[1-4]_crit**

**temp[1-4]_crit_alarm**

**temp[1-4]_crit_hyst**

The driver read the shunt voltage from the chip and convert it to current.

The readable range depends on the "ti,pga-gain" property (default to 8) and the

shunt resistor value. The value resolution will be equal to 10uV/Rshunt.

The driver exports the shunt currents values via the following sysFs files:

**curr1_input**

**curr1_lcrit**

**curr1_lcrit_alarm**

**curr1_crit**

**curr1_crit_alarm**

The bus voltage range is read from the chip with a resolution of 4mV. The chip

can be configurable in two different range (32V or 16V) using the

ti,bus-range-microvolt property in the devicetree.

The driver exports the bus voltage values via the following sysFs files:

**in0_input**

**in0_lcrit**

**in0_lcrit_alarm**

**in0_crit**

**in0_crit_alarm**

The bus power and bus currents range and resolution depends on the calibration

register value. Those values are calculate by the hardware using those

formulas:

Current = (ShuntVoltage * CalibrationRegister) / 4096

Power   = (Current * BusVoltage) / 5000

The driver exports the bus current and bus power values via the following

sysFs files:

**curr2_input**

**power1_input**

**power1_crit**

**power1_crit_alarm**

The calibration process follow the procedure of the datasheet (without overflow)

and depend on the shunt resistor value and the pga_gain value.

F:	Documentation/hwmon/tmp401.rst

F:	drivers/hwmon/tmp401.c

TMP513 HARDWARE MONITOR DRIVER

M:	Eric Tremblay <etremblay@distech-controls.com>

L:	linux-hwmon@vger.kernel.org

S:	Maintained

F:	Documentation/hwmon/tmp513.rst

F:	drivers/hwmon/tmp513.c

TMPFS (SHMEM FILESYSTEM)

M:	Hugh Dickins <hughd@google.com>

L:	linux-mm@kvack.org

	  This driver can also be built as a module. If so, the module

	  will be called tmp421.

config SENSORS_TMP513

	tristate "Texas Instruments TMP513 and compatibles"

	depends on I2C

	help

	  If you say yes here you get support for Texas Instruments TMP512,

	  and TMP513 temperature and power supply sensor chips.

	  This driver can also be built as a module. If so, the module

	  will be called tmp513.

config SENSORS_VEXPRESS

	tristate "Versatile Express"

	depends on VEXPRESS_CONFIG

obj-$(CONFIG_SENSORS_TMP108)	+= tmp108.o

obj-$(CONFIG_SENSORS_TMP401)	+= tmp401.o

obj-$(CONFIG_SENSORS_TMP421)	+= tmp421.o

obj-$(CONFIG_SENSORS_TMP513)	+= tmp513.o

obj-$(CONFIG_SENSORS_VEXPRESS)	+= vexpress-hwmon.o

obj-$(CONFIG_SENSORS_VIA_CPUTEMP)+= via-cputemp.o

obj-$(CONFIG_SENSORS_VIA686A)	+= via686a.o