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hwmon: (k10temp) Update driver documentation

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Document temperature, voltage, and current sensors available with
Family 17h and later CPUs.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
2020-01-27 10:35:44 -08:00
parent 60465245e6
commit 4d52b28ddf
1 changed files with 26 additions and 3 deletions
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29
Documentation/hwmon/k10temp.rst
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@@ -100,9 +100,10 @@ socket type, not the processor's actual capabilities. Therefore, if you
are using an AM3 processor on an AM2+ mainboard, you can safely use the are using an AM3 processor on an AM2+ mainboard, you can safely use the
"force=1" parameter. "force=1" parameter.
There is one temperature measurement value, available as temp1_input in For CPUs older than Family 17h, there is one temperature measurement value,
sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree. available as temp1_input in sysfs. It is measured in degrees Celsius with a
Please note that it is defined as a relative value; to quote the AMD manual:: resolution of 1/8th degree. Please note that it is defined as a relative
value; to quote the AMD manual::
Tctl is the processor temperature control value, used by the platform to Tctl is the processor temperature control value, used by the platform to
control cooling systems. Tctl is a non-physical temperature on an control cooling systems. Tctl is a non-physical temperature on an
@@ -126,3 +127,25 @@ it.
Models from 17h family report relative temperature, the driver aims to Models from 17h family report relative temperature, the driver aims to
compensate and report the real temperature. compensate and report the real temperature.
On Family 17h and Family 18h CPUs, additional temperature sensors may report
Core Complex Die (CCD) temperatures. Up to 8 such temperatures are reported
as temp{3..10}_input, labeled Tccd{1..8}. Actual support depends on the CPU
variant.
Various Family 17h and 18h CPUs report voltage and current telemetry
information. The following attributes may be reported.
Attribute Label Description
=============== ======= ================
in0_input Vcore Core voltage
in1_input Vsoc SoC voltage
curr1_input Icore Core current
curr2_input Isoc SoC current
=============== ======= ================
Current values are raw (unscaled) as reported by the CPU. Core current is
reported as multiples of 1A / LSB. SoC is reported as multiples of 0.25A
/ LSB. The real current is board specific. Reported currents should be seen
as rough guidance, and should be scaled using sensors3.conf as appropriate
for a given board.