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    Subject[PATCH v2 6/8] [PATCH 6/8] Documentation: hwmon: Add a document for PECI hwmon client driver
    Date
    This commit adds a hwmon document for a generic PECI hwmon client driver.

    Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
    ---
    Documentation/hwmon/peci-hwmon | 73 ++++++++++++++++++++++++++++++++++++++++++
    1 file changed, 73 insertions(+)
    create mode 100644 Documentation/hwmon/peci-hwmon

    diff --git a/Documentation/hwmon/peci-hwmon b/Documentation/hwmon/peci-hwmon
    new file mode 100644
    index 000000000000..93e587498536
    --- /dev/null
    +++ b/Documentation/hwmon/peci-hwmon
    @@ -0,0 +1,73 @@
    +Kernel driver peci-hwmon
    +===============================
    +
    +Supported chips:
    + Any recent Intel CPU which is connected through a PECI bus.
    + 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, CPU cores and 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
    +----------------
    +
    +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_input Provides current DTS thermal margin to Tcontrol of the
    + CPU package. Value 0 means it reaches to Tcontrol
    + temperature. Sub-zero value means the die temperature
    + goes across Tconrtol to Tjmax.
    +temp2_min Provides the minimum DTS thermal margin to Tcontrol of
    + the CPU package.
    +temp2_lcrit Provides the value when the CPU package temperature
    + reaches to Tjmax.
    +
    +temp3_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.
    +temp3_crit Provides Tcontrol critical value of the CPU package
    + which is same to Tjmax.
    +
    +temp4_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.
    +
    +temp5_input Provides the maximum junction temperature, Tjmax of the
    + CPU package.
    +
    +temp<n>_label Provides core temperature if this label indicates
    + 'Core #'.
    +temp[n]_input Provides current temperature of each core.
    +temp[n]_max Provides thermal control temperature of the core.
    +temp[n]_crit Provides shutdown temperature of the core.
    +temp[n]_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of
    + the core.
    +
    +temp<n>_label Provides DDR DIMM temperature if this label indicates
    + 'DIMM #'.
    +temp<n>_input Provides current temperature of the DDR DIMM.
    +
    +Note:
    + DIMM temperature group will be appeared when the client CPU's BIOS
    + completes memory training and testing.
    --
    2.16.1
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