Re: [PATCH linux-next v5 10/13] Documentation: hwmon: Add documents for PECI hwmon client drivers

From: Guenter Roeck
Date: Fri Jun 01 2018 - 14:54:18 EST

On Fri, Jun 01, 2018 at 11:22:44AM -0700, Jae Hyun Yoo wrote:
> This commit adds hwmon documents for PECI cputemp and dimmtemp drivers.
>
> Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@xxxxxxxxxxxxxxx>
> Reviewed-by: Haiyue Wang <haiyue.wang@xxxxxxxxxxxxxxx>
> Reviewed-by: James Feist <james.feist@xxxxxxxxxxxxxxx>
> Reviewed-by: Vernon Mauery <vernon.mauery@xxxxxxxxxxxxxxx>
> Cc: Jason M Biils <jason.m.bills@xxxxxxxxxxxxxxx>
> Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

Acked-by: Guenter Roeck <linux@xxxxxxxxxxxx>

> ---
> Documentation/hwmon/peci-cputemp | 78 +++++++++++++++++++++++++++++++
> Documentation/hwmon/peci-dimmtemp | 50 ++++++++++++++++++++
> 2 files changed, 128 insertions(+)
> create mode 100644 Documentation/hwmon/peci-cputemp
> create mode 100644 Documentation/hwmon/peci-dimmtemp
>
> diff --git a/Documentation/hwmon/peci-cputemp b/Documentation/hwmon/peci-cputemp
> new file mode 100644
> index 000000000000..821a9258f2e6
> --- /dev/null
> +++ b/Documentation/hwmon/peci-cputemp
> @@ -0,0 +1,78 @@
> +Kernel driver peci-cputemp
> +==========================
> +
> +Supported chips:
> + One of Intel server CPUs listed below which is connected to a PECI bus.
> + * Intel Xeon E5/E7 v3 server processors
> + Intel Xeon E5-14xx v3 family
> + Intel Xeon E5-24xx v3 family
> + Intel Xeon E5-16xx v3 family
> + Intel Xeon E5-26xx v3 family
> + Intel Xeon E5-46xx v3 family
> + Intel Xeon E7-48xx v3 family
> + Intel Xeon E7-88xx v3 family
> + * Intel Xeon E5/E7 v4 server processors
> + Intel Xeon E5-16xx v4 family
> + Intel Xeon E5-26xx v4 family
> + Intel Xeon E5-46xx v4 family
> + Intel Xeon E7-48xx v4 family
> + Intel Xeon E7-88xx v4 family
> + * Intel Xeon Scalable server processors
> + Intel Xeon Bronze family
> + Intel Xeon Silver family
> + Intel Xeon Gold family
> + Intel Xeon Platinum family
> + Addresses scanned: PECI client address 0x30 - 0x37
> + Datasheet: Available from http://www.intel.com/design/literature.htm
> +
> +Author:
> + Jae Hyun Yoo <jae.hyun.yoo@xxxxxxxxxxxxxxx>
> +
> +Description
> +-----------
> +
> +This driver implements a generic PECI hwmon feature which provides Digital
> +Thermal Sensor (DTS) thermal readings of the CPU package and CPU cores that are
> +accessible using the PECI Client Command Suite via the processor PECI client.
> +
> +All temperature values are given in millidegree Celsius and will be measurable
> +only when the target CPU is powered on.
> +
> +sysfs attributes
> +----------------
> +
> +temp1_label "Die"
> +temp1_input Provides current die temperature of the CPU package.
> +temp1_max Provides thermal control temperature of the CPU package
> + which is also known as Tcontrol.
> +temp1_crit Provides shutdown temperature of the CPU package which
> + is also known as the maximum processor junction
> + temperature, Tjmax or Tprochot.
> +temp1_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of
> + the CPU package.
> +
> +temp2_label "Tcontrol"
> +temp2_input Provides current Tcontrol temperature of the CPU
> + package which is also known as Fan Temperature target.
> + Indicates the relative value from thermal monitor trip
> + temperature at which fans should be engaged.
> +temp2_crit Provides Tcontrol critical value of the CPU package
> + which is same to Tjmax.
> +
> +temp3_label "Tthrottle"
> +temp3_input Provides current Tthrottle temperature of the CPU
> + package. Used for throttling temperature. If this value
> + is allowed and lower than Tjmax - the throttle will
> + occur and reported at lower than Tjmax.
> +
> +temp4_label "Tjmax"
> +temp4_input Provides the maximum junction temperature, Tjmax of the
> + CPU package.
> +
> +temp[5-*]_label Provides string "Core X", where X is resolved core
> + number.
> +temp[5-*]_input Provides current temperature of each core.
> +temp[5-*]_max Provides thermal control temperature of the core.
> +temp[5-*]_crit Provides shutdown temperature of the core.
> +temp[5-*]_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of
> + the core.
> diff --git a/Documentation/hwmon/peci-dimmtemp b/Documentation/hwmon/peci-dimmtemp
> new file mode 100644
> index 000000000000..c54f2526188c
> --- /dev/null
> +++ b/Documentation/hwmon/peci-dimmtemp
> @@ -0,0 +1,50 @@
> +Kernel driver peci-dimmtemp
> +===========================
> +
> +Supported chips:
> + One of Intel server CPUs listed below which is connected to a PECI bus.
> + * Intel Xeon E5/E7 v3 server processors
> + Intel Xeon E5-14xx v3 family
> + Intel Xeon E5-24xx v3 family
> + Intel Xeon E5-16xx v3 family
> + Intel Xeon E5-26xx v3 family
> + Intel Xeon E5-46xx v3 family
> + Intel Xeon E7-48xx v3 family
> + Intel Xeon E7-88xx v3 family
> + * Intel Xeon E5/E7 v4 server processors
> + Intel Xeon E5-16xx v4 family
> + Intel Xeon E5-26xx v4 family
> + Intel Xeon E5-46xx v4 family
> + Intel Xeon E7-48xx v4 family
> + Intel Xeon E7-88xx v4 family
> + * Intel Xeon Scalable server processors
> + Intel Xeon Bronze family
> + Intel Xeon Silver family
> + Intel Xeon Gold family
> + Intel Xeon Platinum family
> + Addresses scanned: PECI client address 0x30 - 0x37
> + Datasheet: Available from http://www.intel.com/design/literature.htm
> +
> +Author:
> + Jae Hyun Yoo <jae.hyun.yoo@xxxxxxxxxxxxxxx>
> +
> +Description
> +-----------
> +
> +This driver implements a generic PECI hwmon feature which provides Digital
> +Thermal Sensor (DTS) thermal readings of DIMM components that are accessible
> +using the PECI Client Command Suite via the processor PECI client.
> +
> +All temperature values are given in millidegree Celsius and will be measurable
> +only when the target CPU is powered on.
> +
> +sysfs attributes
> +----------------
> +
> +temp[N]_label Provides string "DIMM CI", where C is DIMM channel and
> + I is DIMM index of the populated DIMM.
> +temp[N]_input Provides current temperature of the populated DIMM.
> +
> +Note:
> + DIMM temperature attributes will appear when the client CPU's BIOS
> + completes memory training and testing.
> --
> 2.17.0
>