diff mbox series

[v9,2/9] docs: hwmon: (smpro-hwmon) Add documentation

Message ID 20220929094321.770125-3-quan@os.amperecomputing.com
State New
Headers show
Series Add Ampere's Altra SMPro MFD and its child drivers | expand

Commit Message

Quan Nguyen Sept. 29, 2022, 9:43 a.m. UTC 
Add documentation for the Ampere(R)'s Altra(R) SMpro hwmon driver.

Signed-off-by: Thu Nguyen <thu@os.amperecomputing.com>
Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
---
Changes in v9:
  + Update SPDX license                                [Greg]

Changes from v3=>v8:
  + None

Changes in v2:
  + Removed "virtual" sensors [Guenter]
  + Fixed typo "mili" to "milli", "nanoWatt" to "microWatt" [Guenter]
  + Reported SOC_TDP as "Socket TDP" using max attributes [Guenter]
  + Clarified "highest" meaning in documentation [Guenter]
  + Reported MEM HOT Threshold for all DIMMs as temp*_crit [Guenter]
  + Removed Socket TDP sensor [Quan]
  + Included sensor type and channel in labels [Quan]

 Documentation/hwmon/index.rst       |   1 +
 Documentation/hwmon/smpro-hwmon.rst | 101 ++++++++++++++++++++++++++++
 2 files changed, 102 insertions(+)
 create mode 100644 Documentation/hwmon/smpro-hwmon.rst

Comments

Bagas Sanjaya Oct. 1, 2022, 12:56 p.m. UTC | #1 
On Thu, Sep 29, 2022 at 04:43:14PM +0700, Quan Nguyen wrote:
> diff --git a/Documentation/hwmon/smpro-hwmon.rst b/Documentation/hwmon/smpro-hwmon.rst
> new file mode 100644
> index 000000000000..3a9b14dacf89
> --- /dev/null
> +++ b/Documentation/hwmon/smpro-hwmon.rst
> @@ -0,0 +1,101 @@
> +.. SPDX-License-Identifier: GPL-2.0-only
> +
> +Kernel driver Ampere(R)'s Altra(R) SMpro hwmon
> +==============================================
> +
> +Supported chips:
> +
> +  * Ampere(R) Altra(R)
> +
> +    Prefix: 'smpro'
> +
> +    Reference: Altra SoC BMC Interface Specification
> +
> +Author: Thu Nguyen <thu@os.amperecomputing.com>
> +
> +Description
> +-----------
> +This driver supports hardware monitoring for Ampere(R) Altra(R) SoC's based on the
> +SMpro co-processor (SMpro).
> +The following sensor types are supported by the driver:
> +
> +  * temperature
> +  * voltage
> +  * current
> +  * power
> +
> +The SMpro interface provides the registers to query the various sensors and
> +their values which are then exported to userspace by this driver.
> +
> +Usage Notes
> +-----------
> +
> +SMpro hwmon driver creates at least two sysfs files for each sensor.
> +
> +* File ``<sensor_type><idx>_label`` reports the sensor label.
> +* File ``<sensor_type><idx>_input`` returns the sensor value.
> +
> +The sysfs files are allocated in the SMpro root fs folder.
> +There is one root folder for each SMpro instance.
> +
> +When the SoC is turned off, the driver will fail to read registers
> +and return -ENXIO.
> +
> +Sysfs entries
> +-------------
> +
> +The following sysfs files are supported:
> +
> +* Ampere(R) Altra(R):
> +
> +============    =============   ======  ===============================================
> +Name            Unit            Perm    Description
> +temp1_input     milli Celsius   RO      SoC temperature
> +temp2_input     milli Celsius   RO      Max temperature reported among SoC VRDs
> +temp2_crit      milli Celsius   RO      SoC VRD HOT Threshold temperature
> +temp3_input     milli Celsius   RO      Max temperature reported among DIMM VRDs
> +temp4_input     milli Celsius   RO      Max temperature reported among Core VRDs
> +temp5_input     milli Celsius   RO      Temperature of DIMM0 on CH0
> +temp5_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
> +temp6_input     milli Celsius   RO      Temperature of DIMM0 on CH1
> +temp6_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
> +temp7_input     milli Celsius   RO      Temperature of DIMM0 on CH2
> +temp7_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
> +temp8_input     milli Celsius   RO      Temperature of DIMM0 on CH3
> +temp8_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
> +temp9_input     milli Celsius   RO      Temperature of DIMM0 on CH4
> +temp9_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
> +temp10_input    milli Celsius   RO      Temperature of DIMM0 on CH5
> +temp10_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
> +temp11_input    milli Celsius   RO      Temperature of DIMM0 on CH6
> +temp11_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
> +temp12_input    milli Celsius   RO      Temperature of DIMM0 on CH7
> +temp12_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
> +temp13_input    milli Celsius   RO      Max temperature reported among RCA VRDs
> +in0_input       milli Volts     RO      Core voltage
> +in1_input       milli Volts     RO      SoC voltage
> +in2_input       milli Volts     RO      DIMM VRD1 voltage
> +in3_input       milli Volts     RO      DIMM VRD2 voltage
> +in4_input       milli Volts     RO      RCA VRD voltage
> +cur1_input      milli Amperes   RO      Core VRD current
> +cur2_input      milli Amperes   RO      SoC VRD current
> +cur3_input      milli Amperes   RO      DIMM VRD1 current
> +cur4_input      milli Amperes   RO      DIMM VRD2 current
> +cur5_input      milli Amperes   RO      RCA VRD current
> +power1_input    micro Watts     RO      Core VRD power
> +power2_input    micro Watts     RO      SoC VRD power
> +power3_input    micro Watts     RO      DIMM VRD1 power
> +power4_input    micro Watts     RO      DIMM VRD2 power
> +power5_input    micro Watts     RO      RCA VRD power
> +============    =============   ======  ===============================================
> +
> +Example::
> +
> +    # cat in0_input
> +    830
> +    # cat temp1_input
> +    37000
> +    # cat curr1_input
> +    9000
> +    # cat power5_input
> +    19500000
 
The documentation above can be improved (both grammar and formatting):

---- >8 ----

diff --git a/Documentation/hwmon/smpro-hwmon.rst b/Documentation/hwmon/smpro-hwmon.rst
index 3a9b14dacf8975..fb7b3665735bba 100644
--- a/Documentation/hwmon/smpro-hwmon.rst
+++ b/Documentation/hwmon/smpro-hwmon.rst
@@ -7,39 +7,39 @@ Supported chips:
 
   * Ampere(R) Altra(R)
 
-    Prefix: 'smpro'
+    Prefix: ``smpro``
 
-    Reference: Altra SoC BMC Interface Specification
+    Reference: `Altra SoC BMC Interface Specification`
 
 Author: Thu Nguyen <thu@os.amperecomputing.com>
 
 Description
 -----------
-This driver supports hardware monitoring for Ampere(R) Altra(R) SoC's based on the
-SMpro co-processor (SMpro).
-The following sensor types are supported by the driver:
+The smpro-hwmon driver supports hardware monitoring for Ampere(R) Altra(R)
+SoCs based on the SMpro co-processor (SMpro).  The following sensor metrics
+are supported by the driver:
 
   * temperature
   * voltage
   * current
   * power
 
-The SMpro interface provides the registers to query the various sensors and
+The interface provides the registers to query the various sensors and
 their values which are then exported to userspace by this driver.
 
 Usage Notes
 -----------
 
-SMpro hwmon driver creates at least two sysfs files for each sensor.
+The driver creates at least two sysfs files for each sensor.
 
-* File ``<sensor_type><idx>_label`` reports the sensor label.
-* File ``<sensor_type><idx>_input`` returns the sensor value.
+* ``<sensor_type><idx>_label`` reports the sensor label.
+* ``<sensor_type><idx>_input`` returns the sensor value.
 
-The sysfs files are allocated in the SMpro root fs folder.
-There is one root folder for each SMpro instance.
+The sysfs files are allocated in the SMpro rootfs folder, with one root
+directory for each instance.
 
-When the SoC is turned off, the driver will fail to read registers
-and return -ENXIO.
+When the SoC is turned off, the driver will fail to read registers and
+return ``-ENXIO``.
 
 Sysfs entries
 -------------
@@ -48,48 +48,49 @@ The following sysfs files are supported:
 
 * Ampere(R) Altra(R):
 
-============    =============   ======  ===============================================
-Name            Unit            Perm    Description
-temp1_input     milli Celsius   RO      SoC temperature
-temp2_input     milli Celsius   RO      Max temperature reported among SoC VRDs
-temp2_crit      milli Celsius   RO      SoC VRD HOT Threshold temperature
-temp3_input     milli Celsius   RO      Max temperature reported among DIMM VRDs
-temp4_input     milli Celsius   RO      Max temperature reported among Core VRDs
-temp5_input     milli Celsius   RO      Temperature of DIMM0 on CH0
-temp5_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
-temp6_input     milli Celsius   RO      Temperature of DIMM0 on CH1
-temp6_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
-temp7_input     milli Celsius   RO      Temperature of DIMM0 on CH2
-temp7_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
-temp8_input     milli Celsius   RO      Temperature of DIMM0 on CH3
-temp8_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
-temp9_input     milli Celsius   RO      Temperature of DIMM0 on CH4
-temp9_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
-temp10_input    milli Celsius   RO      Temperature of DIMM0 on CH5
-temp10_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
-temp11_input    milli Celsius   RO      Temperature of DIMM0 on CH6
-temp11_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
-temp12_input    milli Celsius   RO      Temperature of DIMM0 on CH7
-temp12_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
-temp13_input    milli Celsius   RO      Max temperature reported among RCA VRDs
-in0_input       milli Volts     RO      Core voltage
-in1_input       milli Volts     RO      SoC voltage
-in2_input       milli Volts     RO      DIMM VRD1 voltage
-in3_input       milli Volts     RO      DIMM VRD2 voltage
-in4_input       milli Volts     RO      RCA VRD voltage
-cur1_input      milli Amperes   RO      Core VRD current
-cur2_input      milli Amperes   RO      SoC VRD current
-cur3_input      milli Amperes   RO      DIMM VRD1 current
-cur4_input      milli Amperes   RO      DIMM VRD2 current
-cur5_input      milli Amperes   RO      RCA VRD current
-power1_input    micro Watts     RO      Core VRD power
-power2_input    micro Watts     RO      SoC VRD power
-power3_input    micro Watts     RO      DIMM VRD1 power
-power4_input    micro Watts     RO      DIMM VRD2 power
-power5_input    micro Watts     RO      RCA VRD power
-============    =============   ======  ===============================================
+  ============    =============  ======  ===============================================
+  Name            Unit           Perm    Description
+  ============    =============  ======  ===============================================
+  temp1_input     millicelsius   RO      SoC temperature
+  temp2_input     millicelsius   RO      Max temperature reported among SoC VRDs
+  temp2_crit      millicelsius   RO      SoC VRD HOT Threshold temperature
+  temp3_input     millicelsius   RO      Max temperature reported among DIMM VRDs
+  temp4_input     millicelsius   RO      Max temperature reported among Core VRDs
+  temp5_input     millicelsius   RO      Temperature of DIMM0 on CH0
+  temp5_crit      millicelsius   RO      MEM HOT Threshold for all DIMMs
+  temp6_input     millicelsius   RO      Temperature of DIMM0 on CH1
+  temp6_crit      millicelsius   RO      MEM HOT Threshold for all DIMMs
+  temp7_input     millicelsius   RO      Temperature of DIMM0 on CH2
+  temp7_crit      millicelsius   RO      MEM HOT Threshold for all DIMMs
+  temp8_input     millicelsius   RO      Temperature of DIMM0 on CH3
+  temp8_crit      millicelsius   RO      MEM HOT Threshold for all DIMMs
+  temp9_input     millicelsius   RO      Temperature of DIMM0 on CH4
+  temp9_crit      millicelsius   RO      MEM HOT Threshold for all DIMMs
+  temp10_input    millicelsius   RO      Temperature of DIMM0 on CH5
+  temp10_crit     millicelsius   RO      MEM HOT Threshold for all DIMMs
+  temp11_input    millicelsius   RO      Temperature of DIMM0 on CH6
+  temp11_crit     millicelsius   RO      MEM HOT Threshold for all DIMMs
+  temp12_input    millicelsius   RO      Temperature of DIMM0 on CH7
+  temp12_crit     millicelsius   RO      MEM HOT Threshold for all DIMMs
+  temp13_input    millicelsius   RO      Max temperature reported among RCA VRDs
+  in0_input       millivolts     RO      Core voltage
+  in1_input       millivolts     RO      SoC voltage
+  in2_input       millivolts     RO      DIMM VRD1 voltage
+  in3_input       millivolts     RO      DIMM VRD2 voltage
+  in4_input       millivolts     RO      RCA VRD voltage
+  cur1_input      milliamperes   RO      Core VRD current
+  cur2_input      milliamperes   RO      SoC VRD current
+  cur3_input      milliamperes   RO      DIMM VRD1 current
+  cur4_input      milliamperes   RO      DIMM VRD2 current
+  cur5_input      milliamperes   RO      RCA VRD current
+  power1_input    microwatts     RO      Core VRD power
+  power2_input    microwatts     RO      SoC VRD power
+  power3_input    microwatts     RO      DIMM VRD1 power
+  power4_input    microwatts     RO      DIMM VRD2 power
+  power5_input    microwatts     RO      RCA VRD power
+  ============    =============  ======  ===============================================
 
-Example::
+  Example::
 
     # cat in0_input
     830

Thanks.
Quan Nguyen Oct. 6, 2022, 7:47 a.m. UTC | #2 
On 01/10/2022 19:56, Bagas Sanjaya wrote:
> On Thu, Sep 29, 2022 at 04:43:14PM +0700, Quan Nguyen wrote:
>> diff --git a/Documentation/hwmon/smpro-hwmon.rst b/Documentation/hwmon/smpro-hwmon.rst
>> new file mode 100644
>> index 000000000000..3a9b14dacf89
>> --- /dev/null
>> +++ b/Documentation/hwmon/smpro-hwmon.rst
>> @@ -0,0 +1,101 @@
>> +.. SPDX-License-Identifier: GPL-2.0-only
>> +
>> +Kernel driver Ampere(R)'s Altra(R) SMpro hwmon
>> +==============================================
>> +
>> +Supported chips:
>> +
>> +  * Ampere(R) Altra(R)
>> +
>> +    Prefix: 'smpro'
>> +
>> +    Reference: Altra SoC BMC Interface Specification
>> +
>> +Author: Thu Nguyen <thu@os.amperecomputing.com>
>> +
>> +Description
>> +-----------
>> +This driver supports hardware monitoring for Ampere(R) Altra(R) SoC's based on the
>> +SMpro co-processor (SMpro).
>> +The following sensor types are supported by the driver:
>> +
>> +  * temperature
>> +  * voltage
>> +  * current
>> +  * power
>> +
>> +The SMpro interface provides the registers to query the various sensors and
>> +their values which are then exported to userspace by this driver.
>> +
>> +Usage Notes
>> +-----------
>> +
>> +SMpro hwmon driver creates at least two sysfs files for each sensor.
>> +
>> +* File ``<sensor_type><idx>_label`` reports the sensor label.
>> +* File ``<sensor_type><idx>_input`` returns the sensor value.
>> +
>> +The sysfs files are allocated in the SMpro root fs folder.
>> +There is one root folder for each SMpro instance.
>> +
>> +When the SoC is turned off, the driver will fail to read registers
>> +and return -ENXIO.
>> +
>> +Sysfs entries
>> +-------------
>> +
>> +The following sysfs files are supported:
>> +
>> +* Ampere(R) Altra(R):
>> +
>> +============    =============   ======  ===============================================
>> +Name            Unit            Perm    Description
>> +temp1_input     milli Celsius   RO      SoC temperature
>> +temp2_input     milli Celsius   RO      Max temperature reported among SoC VRDs
>> +temp2_crit      milli Celsius   RO      SoC VRD HOT Threshold temperature
>> +temp3_input     milli Celsius   RO      Max temperature reported among DIMM VRDs
>> +temp4_input     milli Celsius   RO      Max temperature reported among Core VRDs
>> +temp5_input     milli Celsius   RO      Temperature of DIMM0 on CH0
>> +temp5_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
>> +temp6_input     milli Celsius   RO      Temperature of DIMM0 on CH1
>> +temp6_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
>> +temp7_input     milli Celsius   RO      Temperature of DIMM0 on CH2
>> +temp7_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
>> +temp8_input     milli Celsius   RO      Temperature of DIMM0 on CH3
>> +temp8_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
>> +temp9_input     milli Celsius   RO      Temperature of DIMM0 on CH4
>> +temp9_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
>> +temp10_input    milli Celsius   RO      Temperature of DIMM0 on CH5
>> +temp10_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
>> +temp11_input    milli Celsius   RO      Temperature of DIMM0 on CH6
>> +temp11_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
>> +temp12_input    milli Celsius   RO      Temperature of DIMM0 on CH7
>> +temp12_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
>> +temp13_input    milli Celsius   RO      Max temperature reported among RCA VRDs
>> +in0_input       milli Volts     RO      Core voltage
>> +in1_input       milli Volts     RO      SoC voltage
>> +in2_input       milli Volts     RO      DIMM VRD1 voltage
>> +in3_input       milli Volts     RO      DIMM VRD2 voltage
>> +in4_input       milli Volts     RO      RCA VRD voltage
>> +cur1_input      milli Amperes   RO      Core VRD current
>> +cur2_input      milli Amperes   RO      SoC VRD current
>> +cur3_input      milli Amperes   RO      DIMM VRD1 current
>> +cur4_input      milli Amperes   RO      DIMM VRD2 current
>> +cur5_input      milli Amperes   RO      RCA VRD current
>> +power1_input    micro Watts     RO      Core VRD power
>> +power2_input    micro Watts     RO      SoC VRD power
>> +power3_input    micro Watts     RO      DIMM VRD1 power
>> +power4_input    micro Watts     RO      DIMM VRD2 power
>> +power5_input    micro Watts     RO      RCA VRD power
>> +============    =============   ======  ===============================================
>> +
>> +Example::
>> +
>> +    # cat in0_input
>> +    830
>> +    # cat temp1_input
>> +    37000
>> +    # cat curr1_input
>> +    9000
>> +    # cat power5_input
>> +    19500000
>   
> The documentation above can be improved (both grammar and formatting):
> 
> ---- >8 ----
> 
> diff --git a/Documentation/hwmon/smpro-hwmon.rst b/Documentation/hwmon/smpro-hwmon.rst
> index 3a9b14dacf8975..fb7b3665735bba 100644
> --- a/Documentation/hwmon/smpro-hwmon.rst
> +++ b/Documentation/hwmon/smpro-hwmon.rst
> @@ -7,39 +7,39 @@ Supported chips:
>   
>     * Ampere(R) Altra(R)
>   
> -    Prefix: 'smpro'
> +    Prefix: ``smpro``
>   
> -    Reference: Altra SoC BMC Interface Specification
> +    Reference: `Altra SoC BMC Interface Specification`
>   
>   Author: Thu Nguyen <thu@os.amperecomputing.com>
>   
>   Description
>   -----------
> -This driver supports hardware monitoring for Ampere(R) Altra(R) SoC's based on the
> -SMpro co-processor (SMpro).
> -The following sensor types are supported by the driver:
> +The smpro-hwmon driver supports hardware monitoring for Ampere(R) Altra(R)
> +SoCs based on the SMpro co-processor (SMpro).  The following sensor metrics
> +are supported by the driver:
>   
>     * temperature
>     * voltage
>     * current
>     * power
>   
> -The SMpro interface provides the registers to query the various sensors and
> +The interface provides the registers to query the various sensors and
>   their values which are then exported to userspace by this driver.
>   
>   Usage Notes
>   -----------
>   
> -SMpro hwmon driver creates at least two sysfs files for each sensor.
> +The driver creates at least two sysfs files for each sensor.
>   
> -* File ``<sensor_type><idx>_label`` reports the sensor label.
> -* File ``<sensor_type><idx>_input`` returns the sensor value.
> +* ``<sensor_type><idx>_label`` reports the sensor label.
> +* ``<sensor_type><idx>_input`` returns the sensor value.
>   
> -The sysfs files are allocated in the SMpro root fs folder.
> -There is one root folder for each SMpro instance.
> +The sysfs files are allocated in the SMpro rootfs folder, with one root
> +directory for each instance.
>   
> -When the SoC is turned off, the driver will fail to read registers
> -and return -ENXIO.
> +When the SoC is turned off, the driver will fail to read registers and
> +return ``-ENXIO``.
>   
>   Sysfs entries
>   -------------
> @@ -48,48 +48,49 @@ The following sysfs files are supported:
>   
>   * Ampere(R) Altra(R):
>   
> -============    =============   ======  ===============================================
> -Name            Unit            Perm    Description
> -temp1_input     milli Celsius   RO      SoC temperature
> -temp2_input     milli Celsius   RO      Max temperature reported among SoC VRDs
> -temp2_crit      milli Celsius   RO      SoC VRD HOT Threshold temperature
> -temp3_input     milli Celsius   RO      Max temperature reported among DIMM VRDs
> -temp4_input     milli Celsius   RO      Max temperature reported among Core VRDs
> -temp5_input     milli Celsius   RO      Temperature of DIMM0 on CH0
> -temp5_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
> -temp6_input     milli Celsius   RO      Temperature of DIMM0 on CH1
> -temp6_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
> -temp7_input     milli Celsius   RO      Temperature of DIMM0 on CH2
> -temp7_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
> -temp8_input     milli Celsius   RO      Temperature of DIMM0 on CH3
> -temp8_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
> -temp9_input     milli Celsius   RO      Temperature of DIMM0 on CH4
> -temp9_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
> -temp10_input    milli Celsius   RO      Temperature of DIMM0 on CH5
> -temp10_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
> -temp11_input    milli Celsius   RO      Temperature of DIMM0 on CH6
> -temp11_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
> -temp12_input    milli Celsius   RO      Temperature of DIMM0 on CH7
> -temp12_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
> -temp13_input    milli Celsius   RO      Max temperature reported among RCA VRDs
> -in0_input       milli Volts     RO      Core voltage
> -in1_input       milli Volts     RO      SoC voltage
> -in2_input       milli Volts     RO      DIMM VRD1 voltage
> -in3_input       milli Volts     RO      DIMM VRD2 voltage
> -in4_input       milli Volts     RO      RCA VRD voltage
> -cur1_input      milli Amperes   RO      Core VRD current
> -cur2_input      milli Amperes   RO      SoC VRD current
> -cur3_input      milli Amperes   RO      DIMM VRD1 current
> -cur4_input      milli Amperes   RO      DIMM VRD2 current
> -cur5_input      milli Amperes   RO      RCA VRD current
> -power1_input    micro Watts     RO      Core VRD power
> -power2_input    micro Watts     RO      SoC VRD power
> -power3_input    micro Watts     RO      DIMM VRD1 power
> -power4_input    micro Watts     RO      DIMM VRD2 power
> -power5_input    micro Watts     RO      RCA VRD power
> -============    =============   ======  ===============================================
> +  ============    =============  ======  ===============================================
> +  Name            Unit           Perm    Description
> +  ============    =============  ======  ===============================================
> +  temp1_input     millicelsius   RO      SoC temperature
> +  temp2_input     millicelsius   RO      Max temperature reported among SoC VRDs
> +  temp2_crit      millicelsius   RO      SoC VRD HOT Threshold temperature
> +  temp3_input     millicelsius   RO      Max temperature reported among DIMM VRDs
> +  temp4_input     millicelsius   RO      Max temperature reported among Core VRDs
> +  temp5_input     millicelsius   RO      Temperature of DIMM0 on CH0
> +  temp5_crit      millicelsius   RO      MEM HOT Threshold for all DIMMs
> +  temp6_input     millicelsius   RO      Temperature of DIMM0 on CH1
> +  temp6_crit      millicelsius   RO      MEM HOT Threshold for all DIMMs
> +  temp7_input     millicelsius   RO      Temperature of DIMM0 on CH2
> +  temp7_crit      millicelsius   RO      MEM HOT Threshold for all DIMMs
> +  temp8_input     millicelsius   RO      Temperature of DIMM0 on CH3
> +  temp8_crit      millicelsius   RO      MEM HOT Threshold for all DIMMs
> +  temp9_input     millicelsius   RO      Temperature of DIMM0 on CH4
> +  temp9_crit      millicelsius   RO      MEM HOT Threshold for all DIMMs
> +  temp10_input    millicelsius   RO      Temperature of DIMM0 on CH5
> +  temp10_crit     millicelsius   RO      MEM HOT Threshold for all DIMMs
> +  temp11_input    millicelsius   RO      Temperature of DIMM0 on CH6
> +  temp11_crit     millicelsius   RO      MEM HOT Threshold for all DIMMs
> +  temp12_input    millicelsius   RO      Temperature of DIMM0 on CH7
> +  temp12_crit     millicelsius   RO      MEM HOT Threshold for all DIMMs
> +  temp13_input    millicelsius   RO      Max temperature reported among RCA VRDs
> +  in0_input       millivolts     RO      Core voltage
> +  in1_input       millivolts     RO      SoC voltage
> +  in2_input       millivolts     RO      DIMM VRD1 voltage
> +  in3_input       millivolts     RO      DIMM VRD2 voltage
> +  in4_input       millivolts     RO      RCA VRD voltage
> +  cur1_input      milliamperes   RO      Core VRD current
> +  cur2_input      milliamperes   RO      SoC VRD current
> +  cur3_input      milliamperes   RO      DIMM VRD1 current
> +  cur4_input      milliamperes   RO      DIMM VRD2 current
> +  cur5_input      milliamperes   RO      RCA VRD current
> +  power1_input    microwatts     RO      Core VRD power
> +  power2_input    microwatts     RO      SoC VRD power
> +  power3_input    microwatts     RO      DIMM VRD1 power
> +  power4_input    microwatts     RO      DIMM VRD2 power
> +  power5_input    microwatts     RO      RCA VRD power
> +  ============    =============  ======  ===============================================
>   
> -Example::
> +  Example::
>   
>       # cat in0_input
>       830
> 

Thank you Bagas, will apply in next version.
- Quan
diff mbox series

Patch

diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index c1d11cf13eef..ddff3c5713d7 100644
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -187,6 +187,7 @@  Hardware Monitoring Kernel Drivers
    sis5595
    sl28cpld
    smm665
+   smpro-hwmon
    smsc47b397
    smsc47m192
    smsc47m1
diff --git a/Documentation/hwmon/smpro-hwmon.rst b/Documentation/hwmon/smpro-hwmon.rst
new file mode 100644
index 000000000000..3a9b14dacf89
--- /dev/null
+++ b/Documentation/hwmon/smpro-hwmon.rst
@@ -0,0 +1,101 @@ 
+.. SPDX-License-Identifier: GPL-2.0-only
+
+Kernel driver Ampere(R)'s Altra(R) SMpro hwmon
+==============================================
+
+Supported chips:
+
+  * Ampere(R) Altra(R)
+
+    Prefix: 'smpro'
+
+    Reference: Altra SoC BMC Interface Specification
+
+Author: Thu Nguyen <thu@os.amperecomputing.com>
+
+Description
+-----------
+This driver supports hardware monitoring for Ampere(R) Altra(R) SoC's based on the
+SMpro co-processor (SMpro).
+The following sensor types are supported by the driver:
+
+  * temperature
+  * voltage
+  * current
+  * power
+
+The SMpro interface provides the registers to query the various sensors and
+their values which are then exported to userspace by this driver.
+
+Usage Notes
+-----------
+
+SMpro hwmon driver creates at least two sysfs files for each sensor.
+
+* File ``<sensor_type><idx>_label`` reports the sensor label.
+* File ``<sensor_type><idx>_input`` returns the sensor value.
+
+The sysfs files are allocated in the SMpro root fs folder.
+There is one root folder for each SMpro instance.
+
+When the SoC is turned off, the driver will fail to read registers
+and return -ENXIO.
+
+Sysfs entries
+-------------
+
+The following sysfs files are supported:
+
+* Ampere(R) Altra(R):
+
+============    =============   ======  ===============================================
+Name            Unit            Perm    Description
+temp1_input     milli Celsius   RO      SoC temperature
+temp2_input     milli Celsius   RO      Max temperature reported among SoC VRDs
+temp2_crit      milli Celsius   RO      SoC VRD HOT Threshold temperature
+temp3_input     milli Celsius   RO      Max temperature reported among DIMM VRDs
+temp4_input     milli Celsius   RO      Max temperature reported among Core VRDs
+temp5_input     milli Celsius   RO      Temperature of DIMM0 on CH0
+temp5_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
+temp6_input     milli Celsius   RO      Temperature of DIMM0 on CH1
+temp6_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
+temp7_input     milli Celsius   RO      Temperature of DIMM0 on CH2
+temp7_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
+temp8_input     milli Celsius   RO      Temperature of DIMM0 on CH3
+temp8_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
+temp9_input     milli Celsius   RO      Temperature of DIMM0 on CH4
+temp9_crit      milli Celsius   RO      MEM HOT Threshold for all DIMMs
+temp10_input    milli Celsius   RO      Temperature of DIMM0 on CH5
+temp10_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
+temp11_input    milli Celsius   RO      Temperature of DIMM0 on CH6
+temp11_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
+temp12_input    milli Celsius   RO      Temperature of DIMM0 on CH7
+temp12_crit     milli Celsius   RO      MEM HOT Threshold for all DIMMs
+temp13_input    milli Celsius   RO      Max temperature reported among RCA VRDs
+in0_input       milli Volts     RO      Core voltage
+in1_input       milli Volts     RO      SoC voltage
+in2_input       milli Volts     RO      DIMM VRD1 voltage
+in3_input       milli Volts     RO      DIMM VRD2 voltage
+in4_input       milli Volts     RO      RCA VRD voltage
+cur1_input      milli Amperes   RO      Core VRD current
+cur2_input      milli Amperes   RO      SoC VRD current
+cur3_input      milli Amperes   RO      DIMM VRD1 current
+cur4_input      milli Amperes   RO      DIMM VRD2 current
+cur5_input      milli Amperes   RO      RCA VRD current
+power1_input    micro Watts     RO      Core VRD power
+power2_input    micro Watts     RO      SoC VRD power
+power3_input    micro Watts     RO      DIMM VRD1 power
+power4_input    micro Watts     RO      DIMM VRD2 power
+power5_input    micro Watts     RO      RCA VRD power
+============    =============   ======  ===============================================
+
+Example::
+
+    # cat in0_input
+    830
+    # cat temp1_input
+    37000
+    # cat curr1_input
+    9000
+    # cat power5_input
+    19500000