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

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Date:   Fri, 1 Jun 2018 11:54:11 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Jae Hyun Yoo <jae.hyun.yoo@...ux.intel.com>
Cc:     Jean Delvare <jdelvare@...e.com>, Jonathan Corbet <corbet@....net>,
        linux-hwmon@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, openbmc@...ts.ozlabs.org,
        Jason M Biils <jason.m.bills@...ux.intel.com>,
        Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCH linux-next v5 10/13] Documentation: hwmon: Add documents
 for PECI hwmon client drivers

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@...ux.intel.com>
> Reviewed-by: Haiyue Wang <haiyue.wang@...ux.intel.com>
> Reviewed-by: James Feist <james.feist@...ux.intel.com>
> Reviewed-by: Vernon Mauery <vernon.mauery@...ux.intel.com>
> Cc: Jason M Biils <jason.m.bills@...ux.intel.com>
> Cc: Randy Dunlap <rdunlap@...radead.org>

Acked-by: Guenter Roeck <linux@...ck-us.net>

> ---
>  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@...ux.intel.com>
> +
> +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@...ux.intel.com>
> +
> +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
>