On Sat, Apr 09, 2011 at 12:31:56PM -0400, Jean Delvare wrote: > Recent Xeon processor thermal sensors are supported by the coretemp > driver and not the adm1021 driver. Only one old generation of Xeon > processors (the first Netburst ones) are supported by the adm1021 > driver. > > Reported-by: Darren Hart <dvhart@xxxxxxxxxxxxxxx> > Signed-off-by: Jean Delvare <khali@xxxxxxxxxxxx> Nitpick below, otherwise Acked-by: Guenter Roeck <guenter.roeck@xxxxxxxxxxxx> > --- > Documentation/hwmon/adm1021 | 36 +++++++++++++++++++----------------- > drivers/hwmon/Kconfig | 3 +-- > 2 files changed, 20 insertions(+), 19 deletions(-) > > --- linux-2.6.39-rc2.orig/Documentation/hwmon/adm1021 2010-08-02 00:11:14.000000000 +0200 > +++ linux-2.6.39-rc2/Documentation/hwmon/adm1021 2011-04-08 10:11:13.000000000 +0200 > @@ -14,10 +14,6 @@ Supported chips: > Prefix: 'gl523sm' > Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e > Datasheet: > - * Intel Xeon Processor > - Prefix: - any other - may require 'force_adm1021' parameter > - Addresses scanned: none > - Datasheet: Publicly available at Intel website > * Maxim MAX1617 > Prefix: 'max1617' > Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e > @@ -91,21 +87,27 @@ will do no harm, but will return 'old' v > ADM1021-clones do faster measurements, but there is really no good reason > for that. > > -Xeon support > ------------- > > -Some Xeon processors have real max1617, adm1021, or compatible chips > -within them, with two temperature sensors. > +Netburst-based Xeon support > +--------------------------- > > -Other Xeons have chips with only one sensor. > +Some Xeon processors based on the Netburst (early Pentium 4, from 2001 to > +2003) microarchitecture had real MAX1617, ADM1021, or compatible chips > +within them, with two temperature sensors. Other Xeon processors of this > +era (with 400 MHz FSB) had chips with only one temperature sensor. > > -If you have a Xeon, and the adm1021 module loads, and both temperatures > -appear valid, then things are good. > +If you have such an old Xeon, and you get two valid temperatures when > +loading the adm1021 module, then things are good. > > -If the adm1021 module doesn't load, you should try this: > - modprobe adm1021 force_adm1021=BUS,ADDRESS > - ADDRESS can only be 0x18, 0x1a, 0x29, 0x2b, 0x4c, or 0x4e. > +If nothing happens when loading the adm1021 module, are you are certain are you are -> and you are > +that your specific Xeon processor model includes compatible sensors, you > +will have to explicitly instantiate the sensor chips from user-space. See > +method 4 in Documentation/i2c/instantiating-devices. Possible slave > +addresses are 0x18, 0x1a, 0x29, 0x2b, 0x4c, or 0x4e. It is likely that > +only temp2 will be correct and temp1 will have to be ignored. > > -If you have dual Xeons you may have appear to have two separate > -adm1021-compatible chips, or two single-temperature sensors, at distinct > -addresses. > +Previous generations of the Xeon processor (based on Pentium II/III) > +didn't have these sensors. Next generations of Xeon processors (533 MHz > +FSB and faster) lost them, until the Core-based generation which > +introduced integrated digital thermal sensors. These are supported by > +the coretemp driver. > --- linux-2.6.39-rc2.orig/drivers/hwmon/Kconfig 2011-04-07 18:51:51.000000000 +0200 > +++ linux-2.6.39-rc2/drivers/hwmon/Kconfig 2011-04-08 09:36:50.000000000 +0200 > @@ -110,8 +110,7 @@ config SENSORS_ADM1021 > help > If you say yes here you get support for Analog Devices ADM1021 > and ADM1023 sensor chips and clones: Maxim MAX1617 and MAX1617A, > - Genesys Logic GL523SM, National Semiconductor LM84, TI THMC10, > - and the XEON processor built-in sensor. > + Genesys Logic GL523SM, National Semiconductor LM84 and TI THMC10. > > This driver can also be built as a module. If so, the module > will be called adm1021. > > > -- > Jean Delvare > > _______________________________________________ > lm-sensors mailing list > lm-sensors@xxxxxxxxxxxxxx > http://lists.lm-sensors.org/mailman/listinfo/lm-sensors _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
