hwmon: (tmp401) Add documentation (cd4e96c5) · Commits · 戴 / test

Documentation/hwmon/sysfs-interface

+19 −0

Original line number	Diff line number	Diff line
		@@ -70,6 +70,7 @@ are interpreted as 0! For more on how written strings are interpreted see the
		[0-*] denotes any positive number starting from 0
		[1-*] denotes any positive number starting from 1
		RO read only value
		WO write only value
		RW read/write value

		Read/write values may be read-only for some chips, depending on the
		@@ -295,6 +296,24 @@ temp[1-*]_label Suggested temperature channel label.
		user-space.
		RO

		temp[1-*]_lowest
		Historical minimum temperature
		Unit: millidegree Celsius
		RO

		temp[1-*]_highest
		Historical maximum temperature
		Unit: millidegree Celsius
		RO

		temp[1-*]_reset_history
		Reset temp_lowest and temp_highest
		WO

		temp_reset_history
		Reset temp_lowest and temp_highest for all sensors
		WO

		Some chips measure temperature using external thermistors and an ADC, and
		report the temperature measurement as a voltage. Converting this voltage
		back to a temperature (or the other way around for limits) requires

0 → 100644

+42 −0

Original line number	Diff line number	Diff line
		Kernel driver tmp401
		====================

		Supported chips:
		* Texas Instruments TMP401
		Prefix: 'tmp401'
		Addresses scanned: I2C 0x4c
		Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp401.html
		* Texas Instruments TMP411
		Prefix: 'tmp411'
		Addresses scanned: I2C 0x4c
		Datasheet: http://focus.ti.com/docs/prod/folders/print/tmp411.html

		Authors:
		Hans de Goede <hdegoede@redhat.com>
		Andre Prendel <andre.prendel@gmx.de>

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

		This driver implements support for Texas Instruments TMP401 and
		TMP411 chips. These chips implements one remote and one local
		temperature sensor. Temperature is measured in degrees
		Celsius. Resolution of the remote sensor is 0.0625 degree. Local
		sensor resolution can be set to 0.5, 0.25, 0.125 or 0.0625 degree (not
		supported by the driver so far, so using the default resolution of 0.5
		degree).

		The driver provides the common sysfs-interface for temperatures (see
		/Documentation/hwmon/sysfs-interface under Temperatures).

		The TMP411 chip is compatible with TMP401. It provides some additional
		features.

		* Minimum and Maximum temperature measured since power-on, chip-reset

		Exported via sysfs attributes tempX_lowest and tempX_highest.

		* Reset of historical minimum/maximum temperature measurements

		Exported via sysfs attribute temp_reset_history. Writing 1 to this
		file triggers a reset.