Documentation: hwmon: Add documents for PECI hwmon client drivers

This commit adds hwmon documents for PECI cputemp and dimmtemp drivers.

OpenBMC-Staging-Count: 2
Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Reviewed-by: Haiyue Wang <haiyue.wang@linux.intel.com>
Reviewed-by: James Feist <james.feist@linux.intel.com>
Reviewed-by: Vernon Mauery <vernon.mauery@linux.intel.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Joel Stanley <joel@jms.id.au>

2 files changed, 128 insertions, 0 deletions

diff --git a/Documentation/hwmon/peci-cputemp b/Documentation/hwmon/peci-cputemp
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index 000000000000..821a9258f2e6
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+++ b/Documentation/hwmon/peci-cputemp
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+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@linux.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
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+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@linux.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.