| Message ID | 20190923071052.25320-1-lzap+git@redhat.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | k10temp: update documentation | expand |
On Mon, Sep 23, 2019 at 09:10:52AM +0200, Lukas Zapletal wrote: > 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> > --- > Documentation/hwmon/k10temp.rst | 19 +++++++++++++++++-- > 1 file changed, 17 insertions(+), 2 deletions(-) > > diff --git a/Documentation/hwmon/k10temp.rst b/Documentation/hwmon/k10temp.rst > index 12a86ba17de9..bb2d0a02dc45 100644 > --- a/Documentation/hwmon/k10temp.rst > +++ b/Documentation/hwmon/k10temp.rst > @@ -1,7 +1,7 @@ > Kernel driver k10temp > ===================== > > -Supported chips: > +Although the driver is named k10temp, it supports wide range of AMD CPUs: > I did ask to drop the above, and I won't accept the patch as-is. Many hwmon (and other) drivers are named after one chip but support many, it would be quite pointless to state that in each driver's documentation, and I won't get it started. Guenter
diff --git a/Documentation/hwmon/k10temp.rst b/Documentation/hwmon/k10temp.rst index 12a86ba17de9..bb2d0a02dc45 100644 --- a/Documentation/hwmon/k10temp.rst +++ b/Documentation/hwmon/k10temp.rst @@ -1,7 +1,7 @@ Kernel driver k10temp ===================== -Supported chips: +Although the driver is named k10temp, it supports wide range of AMD CPUs: * AMD Family 10h processors: @@ -21,10 +21,16 @@ Supported chips: * 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 17h processors: "Zen", "Zen 2" + +* AMD Family 18h processors: "Hygon Dhyana" + +* AMD Family 19h processors: "Zen 3" + Prefix: 'k10temp' Addresses scanned: PCI space @@ -110,3 +116,12 @@ The maximum value for Tctl is available in the file temp1_max. If the BIOS has enabled hardware temperature control, the threshold at which the processor will throttle itself to avoid damage is available in 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.
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> --- Documentation/hwmon/k10temp.rst | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-)