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JEDEC_TS(4)	       FreeBSD Kernel Interfaces Manual		   JEDEC_TS(4)

NAME
     jedec_ts -- driver	for temperature	sensors	on memory modules

SYNOPSIS
	   device jedec_ts
	   device smbus

     Alternatively, to load the	driver as a module at boot time, place the
     following line in loader.conf(5):

	   jedec_ts_load="YES"

     In	/boot/device.hints:

	   hint.jedec_ts.0.at="smbus0"
	   hint.jedec_ts.0.addr="0x30"
	   hint.jedec_ts.1.at="smbus0"
	   hint.jedec_ts.1.addr="0x32"
	   hint.jedec_ts.2.at="smbus0"
	   hint.jedec_ts.2.addr="0x34"
	   hint.jedec_ts.3.at="smbus0"
	   hint.jedec_ts.3.addr="0x36"
	   hint.jedec_ts.4.at="smbus0"
	   hint.jedec_ts.4.addr="0x38"
	   hint.jedec_ts.5.at="smbus0"
	   hint.jedec_ts.5.addr="0x3A"
	   hint.jedec_ts.6.at="smbus0"
	   hint.jedec_ts.6.addr="0x3C"
	   hint.jedec_ts.7.at="smbus0"
	   hint.jedec_ts.7.addr="0x3E"

DESCRIPTION
     The jedec_ts driver provides access to sensor data	over the smbus(4).
     The driver	supports temperature sensors on	memory modules that conform to
     JEDEC Standard 21-C, TSE2002 Specification.

     The access	to jedec_ts data is made via the sysctl(8) interface:

     dev.jedec_ts.%d.temp  read-only value of the current temperature read by
			   the sensor.

     On	a system using device.hints(5),	these values are configurable for
     jedec_ts:

     hint.jedec_ts.%d.at    target smbus(4).

     hint.jedec_ts.%d.addr  jedec_ts SMBus address on the smbus(4).

     jedec_ts temperature sensors can be wired to eight	different addresses,
     allowing up to eight sensors on the same smbus(4).

     If	the sensors are	on an I2C bus behind an	iicbus(4) controller, then the
     iicsmb(4) bridge driver can be used to attach the smbus(4).

EXAMPLES
   Sensor read out for two memory modules:
     dev.jedec_ts.0.temp: 40.2500C
     dev.jedec_ts.1.temp: 40.7500C

SEE ALSO
     iicbus(4),	iicsmb(4), smbus(4), sysctl(8)

HISTORY
     The jedec_ts driver first appeared	in FreeBSD 11.1.

AUTHORS
     The jedec_ts driver and this manual page were written by Andriy Gapon
     <avg@FreeBSD.org>.

FreeBSD	11.1			  May 9, 2017			  FreeBSD 11.1

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | SEE ALSO | HISTORY | AUTHORS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=jedec_ts&manpath=FreeBSD+11.1-RELEASE+and+Ports>

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