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hwmon: (k10temp) Update documentation and add temp2_input info

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It's been a while since the k10temp documentation has been updated.
There are new CPU families supported as well as Tdie temp was added.
This patch adds all missing families which I was able to find from git
history and provides more info about Tctl vs Tdie exported temps.

Signed-off-by: Lukas Zapletal <lzap+git@redhat.com>
Link: https://lore.kernel.org/r/20190923105931.27881-1-lzap+git@redhat.com
[groeck: Formatting]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Lukas Zapletal 2019-09-23 12:59:31 +02:00 committed by Guenter Roeck
parent 539ad001d1
commit 43fd0cf4c6
1 changed files with 17 additions and 1 deletions
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18
Documentation/hwmon/k10temp.rst
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@ -21,10 +21,17 @@ Supported chips:
* AMD Family 14h processors: "Brazos" (C/E/G/Z-Series) * AMD Family 14h processors: "Brazos" (C/E/G/Z-Series)
* AMD Family 15h processors: "Bulldozer" (FX-Series), "Trinity", "Kaveri", "Carrizo" * AMD Family 15h processors: "Bulldozer" (FX-Series), "Trinity", "Kaveri",
"Carrizo", "Stoney Ridge", "Bristol Ridge"
* AMD Family 16h processors: "Kabini", "Mullins" * AMD Family 16h processors: "Kabini", "Mullins"
* AMD Family 17h processors: "Zen", "Zen 2"
* AMD Family 18h processors: "Hygon Dhyana"
* AMD Family 19h processors: "Zen 3"
Prefix: 'k10temp' Prefix: 'k10temp'
Addresses scanned: PCI space Addresses scanned: PCI space
@ -110,3 +117,12 @@ The maximum value for Tctl is available in the file temp1_max.
If the BIOS has enabled hardware temperature control, the threshold at If the BIOS has enabled hardware temperature control, the threshold at
which the processor will throttle itself to avoid damage is available in which the processor will throttle itself to avoid damage is available in
temp1_crit and temp1_crit_hyst. temp1_crit and temp1_crit_hyst.
On some AMD CPUs, there is a difference between the die temperature (Tdie) and
the reported temperature (Tctl). Tdie is the real measured temperature, and
Tctl is used for fan control. While Tctl is always available as temp1_input,
the driver exports Tdie temperature as temp2_input for those CPUs which support
it.
Models from 17h family report relative temperature, the driver aims to
compensate and report the real temperature.