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>.

Debian                                             May 9, 2017                                       JEDEC_TS(4)